./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-chromosome-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-chromosome-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 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:32:23,198 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:32:23,267 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:32:23,271 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:32:23,271 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:32:23,296 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:32:23,297 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:32:23,297 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:32:23,298 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:32:23,301 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:32:23,301 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:32:23,301 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:32:23,302 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:32:23,303 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:32:23,303 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:32:23,303 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:32:23,304 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:32:23,304 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:32:23,304 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:32:23,304 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:32:23,305 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:32:23,306 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:32:23,306 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:32:23,306 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:32:23,306 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:32:23,306 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:32:23,307 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:32:23,307 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:32:23,307 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:32:23,307 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:32:23,308 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:32:23,309 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:32:23,309 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:32:23,309 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:32:23,309 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:32:23,309 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:32:23,309 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:32:23,310 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:32:23,310 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:32:23,310 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:32:23,310 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:32:23,310 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:32:23,311 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:32:23,311 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa [2024-06-27 16:32:23,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:32:23,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:32:23,515 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:32:23,516 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:32:23,516 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:32:23,517 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2024-06-27 16:32:24,555 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:32:24,707 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:32:24,707 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2024-06-27 16:32:24,713 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fdebc588/7bc11cda5b1f4c54a90e2cd94b796585/FLAG5added2c7 [2024-06-27 16:32:24,722 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fdebc588/7bc11cda5b1f4c54a90e2cd94b796585 [2024-06-27 16:32:24,723 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:32:24,724 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:32:24,725 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:32:24,725 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:32:24,729 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:32:24,729 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:32:24" (1/1) ... [2024-06-27 16:32:24,730 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@752802a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:32:24, skipping insertion in model container [2024-06-27 16:32:24,730 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:32:24" (1/1) ... [2024-06-27 16:32:24,744 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:32:24,922 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-chromosome-symm.wvr.c[2721,2734] [2024-06-27 16:32:24,939 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:32:24,947 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:32:24,961 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-chromosome-symm.wvr.c[2721,2734] [2024-06-27 16:32:24,964 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:32:25,006 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:32:25,006 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:32:25 WrapperNode [2024-06-27 16:32:25,007 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:32:25,007 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:32:25,007 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:32:25,008 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:32:25,012 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:32:25" (1/1) ... [2024-06-27 16:32:25,018 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:32:25" (1/1) ... [2024-06-27 16:32:25,053 INFO L138 Inliner]: procedures = 24, calls = 27, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 191 [2024-06-27 16:32:25,054 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:32:25,055 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:32:25,056 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:32:25,056 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:32:25,064 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:32:25" (1/1) ... [2024-06-27 16:32:25,064 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:32:25" (1/1) ... [2024-06-27 16:32:25,076 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:32:25" (1/1) ... [2024-06-27 16:32:25,105 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-06-27 16:32:25,105 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:32:25" (1/1) ... [2024-06-27 16:32:25,105 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:32:25" (1/1) ... [2024-06-27 16:32:25,110 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:32:25" (1/1) ... [2024-06-27 16:32:25,112 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:32:25" (1/1) ... [2024-06-27 16:32:25,113 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:32:25" (1/1) ... [2024-06-27 16:32:25,114 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:32:25" (1/1) ... [2024-06-27 16:32:25,116 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:32:25,117 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:32:25,117 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:32:25,117 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:32:25,118 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:32:25" (1/1) ... [2024-06-27 16:32:25,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:32:25,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:25,150 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 16:32:25,181 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 16:32:25,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:32:25,210 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 16:32:25,210 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 16:32:25,211 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 16:32:25,211 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 16:32:25,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:32:25,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 16:32:25,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 16:32:25,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 16:32:25,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 16:32:25,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:32:25,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:32:25,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 16:32:25,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 16:32:25,214 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 16:32:25,293 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:32:25,295 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:32:25,526 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:32:25,526 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:32:25,708 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:32:25,708 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-06-27 16:32:25,709 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:32:25 BoogieIcfgContainer [2024-06-27 16:32:25,709 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:32:25,710 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:32:25,711 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:32:25,714 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:32:25,714 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:32:24" (1/3) ... [2024-06-27 16:32:25,714 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382caac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:32:25, skipping insertion in model container [2024-06-27 16:32:25,716 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:32:25" (2/3) ... [2024-06-27 16:32:25,716 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382caac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:32:25, skipping insertion in model container [2024-06-27 16:32:25,716 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:32:25" (3/3) ... [2024-06-27 16:32:25,719 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2024-06-27 16:32:25,725 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:32:25,732 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:32:25,733 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 16:32:25,733 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:32:25,777 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 16:32:25,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 22 transitions, 58 flow [2024-06-27 16:32:25,830 INFO L124 PetriNetUnfolderBase]: 4/20 cut-off events. [2024-06-27 16:32:25,830 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:32:25,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 4/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 11 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 12. Up to 2 conditions per place. [2024-06-27 16:32:25,833 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 22 transitions, 58 flow [2024-06-27 16:32:25,838 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 19 transitions, 50 flow [2024-06-27 16:32:25,845 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:32:25,850 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;@50bf96ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:32:25,850 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-06-27 16:32:25,862 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:32:25,862 INFO L124 PetriNetUnfolderBase]: 4/18 cut-off events. [2024-06-27 16:32:25,862 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:32:25,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:25,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:25,863 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 16:32:25,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:25,867 INFO L85 PathProgramCache]: Analyzing trace with hash 2024243091, now seen corresponding path program 1 times [2024-06-27 16:32:25,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:25,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046294297] [2024-06-27 16:32:25,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:25,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:26,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:26,242 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 16:32:26,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:26,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046294297] [2024-06-27 16:32:26,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046294297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:32:26,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:32:26,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:32:26,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574752265] [2024-06-27 16:32:26,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:32:26,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:32:26,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:26,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:32:26,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:32:26,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:32:26,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 16:32:26,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:26,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:32:26,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:26,355 INFO L124 PetriNetUnfolderBase]: 39/74 cut-off events. [2024-06-27 16:32:26,355 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-06-27 16:32:26,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 74 events. 39/74 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 120 event pairs, 22 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 120. Up to 72 conditions per place. [2024-06-27 16:32:26,359 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 16 selfloop transitions, 4 changer transitions 0/21 dead transitions. [2024-06-27 16:32:26,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 21 transitions, 94 flow [2024-06-27 16:32:26,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:32:26,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:32:26,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 31 transitions. [2024-06-27 16:32:26,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-27 16:32:26,371 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 50 flow. Second operand 3 states and 31 transitions. [2024-06-27 16:32:26,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 21 transitions, 94 flow [2024-06-27 16:32:26,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 21 transitions, 86 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 16:32:26,375 INFO L231 Difference]: Finished difference. Result has 21 places, 21 transitions, 64 flow [2024-06-27 16:32:26,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=21, PETRI_TRANSITIONS=21} [2024-06-27 16:32:26,380 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2024-06-27 16:32:26,380 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 21 transitions, 64 flow [2024-06-27 16:32:26,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 16:32:26,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:26,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:26,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:32:26,381 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 16:32:26,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:26,382 INFO L85 PathProgramCache]: Analyzing trace with hash -637121085, now seen corresponding path program 1 times [2024-06-27 16:32:26,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:26,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557639341] [2024-06-27 16:32:26,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:26,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:26,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:26,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:32:26,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:26,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557639341] [2024-06-27 16:32:26,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557639341] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:26,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351660725] [2024-06-27 16:32:26,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:26,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:26,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:26,569 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 16:32:26,570 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 16:32:26,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:26,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2024-06-27 16:32:26,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:32:26,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:26,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:32:26,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351660725] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:26,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:26,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-06-27 16:32:26,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365531048] [2024-06-27 16:32:26,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:26,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 16:32:26,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:26,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 16:32:26,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 16:32:26,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:32:26,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 21 transitions, 64 flow. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 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 16:32:26,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:26,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:32:26,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:26,832 INFO L124 PetriNetUnfolderBase]: 39/80 cut-off events. [2024-06-27 16:32:26,832 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:32:26,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 80 events. 39/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 121 event pairs, 22 based on Foata normal form. 3/67 useless extension candidates. Maximal degree in co-relation 152. Up to 72 conditions per place. [2024-06-27 16:32:26,834 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 16 selfloop transitions, 10 changer transitions 0/27 dead transitions. [2024-06-27 16:32:26,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 27 transitions, 140 flow [2024-06-27 16:32:26,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:32:26,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:32:26,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 50 transitions. [2024-06-27 16:32:26,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2024-06-27 16:32:26,838 INFO L175 Difference]: Start difference. First operand has 21 places, 21 transitions, 64 flow. Second operand 6 states and 50 transitions. [2024-06-27 16:32:26,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 27 transitions, 140 flow [2024-06-27 16:32:26,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 27 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 16:32:26,840 INFO L231 Difference]: Finished difference. Result has 28 places, 27 transitions, 126 flow [2024-06-27 16:32:26,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=126, PETRI_PLACES=28, PETRI_TRANSITIONS=27} [2024-06-27 16:32:26,843 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 6 predicate places. [2024-06-27 16:32:26,844 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 27 transitions, 126 flow [2024-06-27 16:32:26,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 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 16:32:26,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:26,845 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:26,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-27 16:32:27,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:27,058 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 16:32:27,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:27,059 INFO L85 PathProgramCache]: Analyzing trace with hash 320875781, now seen corresponding path program 2 times [2024-06-27 16:32:27,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:27,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510237473] [2024-06-27 16:32:27,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:27,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:27,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-06-27 16:32:27,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:27,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510237473] [2024-06-27 16:32:27,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510237473] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:27,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657549913] [2024-06-27 16:32:27,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:32:27,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:27,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:27,234 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 16:32:27,240 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 16:32:27,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-27 16:32:27,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:27,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:32:27,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:27,396 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-06-27 16:32:27,396 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 16:32:27,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657549913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:32:27,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 16:32:27,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2024-06-27 16:32:27,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046652151] [2024-06-27 16:32:27,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:32:27,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:32:27,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:27,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:32:27,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:32:27,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:32:27,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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 16:32:27,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:27,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:32:27,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:27,490 INFO L124 PetriNetUnfolderBase]: 61/124 cut-off events. [2024-06-27 16:32:27,491 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:32:27,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 124 events. 61/124 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 288 event pairs, 22 based on Foata normal form. 3/98 useless extension candidates. Maximal degree in co-relation 232. Up to 79 conditions per place. [2024-06-27 16:32:27,492 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 36 selfloop transitions, 4 changer transitions 2/43 dead transitions. [2024-06-27 16:32:27,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 43 transitions, 246 flow [2024-06-27 16:32:27,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:32:27,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:32:27,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 50 transitions. [2024-06-27 16:32:27,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 16:32:27,495 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 126 flow. Second operand 5 states and 50 transitions. [2024-06-27 16:32:27,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 43 transitions, 246 flow [2024-06-27 16:32:27,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 43 transitions, 230 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 16:32:27,499 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 132 flow [2024-06-27 16:32:27,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=27, 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=132, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2024-06-27 16:32:27,499 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 11 predicate places. [2024-06-27 16:32:27,500 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 132 flow [2024-06-27 16:32:27,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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 16:32:27,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:27,500 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:27,525 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 16:32:27,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-06-27 16:32:27,712 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 16:32:27,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:27,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1510976613, now seen corresponding path program 3 times [2024-06-27 16:32:27,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:27,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282471854] [2024-06-27 16:32:27,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:27,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:27,836 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-06-27 16:32:27,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:27,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282471854] [2024-06-27 16:32:27,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282471854] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:27,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955512101] [2024-06-27 16:32:27,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:32:27,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:27,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:27,841 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 16:32:27,842 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 16:32:27,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-27 16:32:27,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:27,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:32:27,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:27,945 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-06-27 16:32:27,945 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 16:32:27,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955512101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:32:27,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 16:32:27,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2024-06-27 16:32:27,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812820574] [2024-06-27 16:32:27,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:32:27,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:32:27,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:27,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:32:27,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:32:27,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:32:27,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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 16:32:27,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:27,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:32:27,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:28,002 INFO L124 PetriNetUnfolderBase]: 67/134 cut-off events. [2024-06-27 16:32:28,002 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2024-06-27 16:32:28,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 382 conditions, 134 events. 67/134 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 315 event pairs, 15 based on Foata normal form. 4/115 useless extension candidates. Maximal degree in co-relation 325. Up to 83 conditions per place. [2024-06-27 16:32:28,003 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 33 selfloop transitions, 5 changer transitions 1/40 dead transitions. [2024-06-27 16:32:28,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 40 transitions, 250 flow [2024-06-27 16:32:28,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:32:28,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:32:28,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 43 transitions. [2024-06-27 16:32:28,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39090909090909093 [2024-06-27 16:32:28,005 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 132 flow. Second operand 5 states and 43 transitions. [2024-06-27 16:32:28,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 40 transitions, 250 flow [2024-06-27 16:32:28,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 40 transitions, 237 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 16:32:28,007 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 155 flow [2024-06-27 16:32:28,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=155, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2024-06-27 16:32:28,008 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 15 predicate places. [2024-06-27 16:32:28,008 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 155 flow [2024-06-27 16:32:28,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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 16:32:28,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:28,008 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:28,036 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 16:32:28,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:28,237 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 16:32:28,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:28,238 INFO L85 PathProgramCache]: Analyzing trace with hash -2121491363, now seen corresponding path program 4 times [2024-06-27 16:32:28,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:28,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320433552] [2024-06-27 16:32:28,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:28,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:28,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:28,335 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-06-27 16:32:28,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:28,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320433552] [2024-06-27 16:32:28,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320433552] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:28,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232083884] [2024-06-27 16:32:28,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:32:28,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:28,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:28,337 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 16:32:28,366 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 16:32:28,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:32:28,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:28,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:32:28,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:28,495 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-06-27 16:32:28,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:28,529 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-06-27 16:32:28,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232083884] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:28,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:28,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-06-27 16:32:28,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850012938] [2024-06-27 16:32:28,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:28,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 16:32:28,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:28,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 16:32:28,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2024-06-27 16:32:28,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:32:28,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 155 flow. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 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 16:32:28,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:28,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:32:28,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:28,607 INFO L124 PetriNetUnfolderBase]: 67/136 cut-off events. [2024-06-27 16:32:28,607 INFO L125 PetriNetUnfolderBase]: For 133/133 co-relation queries the response was YES. [2024-06-27 16:32:28,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 415 conditions, 136 events. 67/136 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 312 event pairs, 39 based on Foata normal form. 1/114 useless extension candidates. Maximal degree in co-relation 348. Up to 125 conditions per place. [2024-06-27 16:32:28,609 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 20 selfloop transitions, 12 changer transitions 0/33 dead transitions. [2024-06-27 16:32:28,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 33 transitions, 231 flow [2024-06-27 16:32:28,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:32:28,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:32:28,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 51 transitions. [2024-06-27 16:32:28,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33116883116883117 [2024-06-27 16:32:28,610 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 155 flow. Second operand 7 states and 51 transitions. [2024-06-27 16:32:28,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 33 transitions, 231 flow [2024-06-27 16:32:28,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 33 transitions, 228 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 16:32:28,612 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 198 flow [2024-06-27 16:32:28,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=198, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2024-06-27 16:32:28,612 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 20 predicate places. [2024-06-27 16:32:28,613 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 198 flow [2024-06-27 16:32:28,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 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 16:32:28,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:28,613 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:28,636 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 16:32:28,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:28,825 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 16:32:28,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:28,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1683586879, now seen corresponding path program 5 times [2024-06-27 16:32:28,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:28,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172277002] [2024-06-27 16:32:28,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:28,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:28,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:28,987 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:28,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:28,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172277002] [2024-06-27 16:32:28,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172277002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:32:28,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:32:28,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 16:32:28,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974497933] [2024-06-27 16:32:28,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:32:28,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:32:28,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:28,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:32:28,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:32:28,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:32:28,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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 16:32:28,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:28,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:32:28,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:29,043 INFO L124 PetriNetUnfolderBase]: 81/160 cut-off events. [2024-06-27 16:32:29,043 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2024-06-27 16:32:29,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 160 events. 81/160 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 396 event pairs, 5 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 413. Up to 124 conditions per place. [2024-06-27 16:32:29,045 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 39 selfloop transitions, 6 changer transitions 0/46 dead transitions. [2024-06-27 16:32:29,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 332 flow [2024-06-27 16:32:29,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:32:29,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:32:29,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 45 transitions. [2024-06-27 16:32:29,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-27 16:32:29,046 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 198 flow. Second operand 5 states and 45 transitions. [2024-06-27 16:32:29,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 332 flow [2024-06-27 16:32:29,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 308 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 16:32:29,048 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 208 flow [2024-06-27 16:32:29,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=208, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2024-06-27 16:32:29,048 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 22 predicate places. [2024-06-27 16:32:29,049 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 208 flow [2024-06-27 16:32:29,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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 16:32:29,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:29,049 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:29,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 16:32:29,049 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 16:32:29,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:29,050 INFO L85 PathProgramCache]: Analyzing trace with hash 563321565, now seen corresponding path program 1 times [2024-06-27 16:32:29,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:29,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102188313] [2024-06-27 16:32:29,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:29,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:29,185 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:29,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:29,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102188313] [2024-06-27 16:32:29,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102188313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:32:29,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:32:29,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 16:32:29,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200692332] [2024-06-27 16:32:29,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:32:29,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:32:29,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:29,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:32:29,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:32:29,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:32:29,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:29,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:29,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:32:29,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:29,253 INFO L124 PetriNetUnfolderBase]: 69/136 cut-off events. [2024-06-27 16:32:29,253 INFO L125 PetriNetUnfolderBase]: For 215/215 co-relation queries the response was YES. [2024-06-27 16:32:29,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 136 events. 69/136 cut-off events. For 215/215 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 312 event pairs, 22 based on Foata normal form. 6/121 useless extension candidates. Maximal degree in co-relation 410. Up to 99 conditions per place. [2024-06-27 16:32:29,254 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 37 selfloop transitions, 7 changer transitions 2/47 dead transitions. [2024-06-27 16:32:29,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 47 transitions, 348 flow [2024-06-27 16:32:29,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:32:29,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:32:29,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 47 transitions. [2024-06-27 16:32:29,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42727272727272725 [2024-06-27 16:32:29,255 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 208 flow. Second operand 5 states and 47 transitions. [2024-06-27 16:32:29,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 47 transitions, 348 flow [2024-06-27 16:32:29,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 47 transitions, 338 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 16:32:29,257 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 227 flow [2024-06-27 16:32:29,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=227, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2024-06-27 16:32:29,258 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2024-06-27 16:32:29,258 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 227 flow [2024-06-27 16:32:29,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:29,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:29,258 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:29,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 16:32:29,258 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 16:32:29,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:29,259 INFO L85 PathProgramCache]: Analyzing trace with hash 134918016, now seen corresponding path program 1 times [2024-06-27 16:32:29,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:29,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626558195] [2024-06-27 16:32:29,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:29,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:29,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:29,405 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-06-27 16:32:29,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:29,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626558195] [2024-06-27 16:32:29,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626558195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:32:29,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:32:29,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 16:32:29,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273473643] [2024-06-27 16:32:29,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:32:29,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:32:29,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:29,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:32:29,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:32:29,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:32:29,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 227 flow. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:29,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:29,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:32:29,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:29,472 INFO L124 PetriNetUnfolderBase]: 85/168 cut-off events. [2024-06-27 16:32:29,472 INFO L125 PetriNetUnfolderBase]: For 359/359 co-relation queries the response was YES. [2024-06-27 16:32:29,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 617 conditions, 168 events. 85/168 cut-off events. For 359/359 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 420 event pairs, 27 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 544. Up to 117 conditions per place. [2024-06-27 16:32:29,474 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 43 selfloop transitions, 8 changer transitions 0/52 dead transitions. [2024-06-27 16:32:29,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 52 transitions, 400 flow [2024-06-27 16:32:29,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:32:29,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:32:29,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2024-06-27 16:32:29,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-27 16:32:29,475 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 227 flow. Second operand 5 states and 48 transitions. [2024-06-27 16:32:29,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 52 transitions, 400 flow [2024-06-27 16:32:29,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 52 transitions, 374 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 16:32:29,477 INFO L231 Difference]: Finished difference. Result has 48 places, 39 transitions, 258 flow [2024-06-27 16:32:29,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=258, PETRI_PLACES=48, PETRI_TRANSITIONS=39} [2024-06-27 16:32:29,478 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 26 predicate places. [2024-06-27 16:32:29,478 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 39 transitions, 258 flow [2024-06-27 16:32:29,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:29,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:29,478 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:29,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 16:32:29,479 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 16:32:29,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:29,479 INFO L85 PathProgramCache]: Analyzing trace with hash -659868296, now seen corresponding path program 2 times [2024-06-27 16:32:29,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:29,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141202004] [2024-06-27 16:32:29,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:29,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:29,613 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-06-27 16:32:29,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:29,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141202004] [2024-06-27 16:32:29,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141202004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:32:29,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:32:29,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 16:32:29,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572675263] [2024-06-27 16:32:29,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:32:29,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:32:29,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:29,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:32:29,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:32:29,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:32:29,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 39 transitions, 258 flow. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:29,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:29,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:32:29,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:29,681 INFO L124 PetriNetUnfolderBase]: 80/153 cut-off events. [2024-06-27 16:32:29,682 INFO L125 PetriNetUnfolderBase]: For 400/400 co-relation queries the response was YES. [2024-06-27 16:32:29,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 153 events. 80/153 cut-off events. For 400/400 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 354 event pairs, 27 based on Foata normal form. 2/143 useless extension candidates. Maximal degree in co-relation 527. Up to 117 conditions per place. [2024-06-27 16:32:29,683 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 37 selfloop transitions, 7 changer transitions 2/47 dead transitions. [2024-06-27 16:32:29,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 47 transitions, 380 flow [2024-06-27 16:32:29,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:32:29,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:32:29,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 42 transitions. [2024-06-27 16:32:29,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-06-27 16:32:29,684 INFO L175 Difference]: Start difference. First operand has 48 places, 39 transitions, 258 flow. Second operand 5 states and 42 transitions. [2024-06-27 16:32:29,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 47 transitions, 380 flow [2024-06-27 16:32:29,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 47 transitions, 375 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 16:32:29,686 INFO L231 Difference]: Finished difference. Result has 53 places, 39 transitions, 277 flow [2024-06-27 16:32:29,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=277, PETRI_PLACES=53, PETRI_TRANSITIONS=39} [2024-06-27 16:32:29,687 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 31 predicate places. [2024-06-27 16:32:29,687 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 39 transitions, 277 flow [2024-06-27 16:32:29,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:32:29,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:29,687 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:29,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 16:32:29,687 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 16:32:29,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:29,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1888690876, now seen corresponding path program 1 times [2024-06-27 16:32:29,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:29,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439804668] [2024-06-27 16:32:29,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:29,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:29,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:30,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:30,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439804668] [2024-06-27 16:32:30,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439804668] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:30,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327607639] [2024-06-27 16:32:30,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:30,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:30,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:30,326 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 16:32:30,343 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 16:32:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:30,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 16:32:30,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:30,531 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:32:30,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-06-27 16:32:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:30,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:30,897 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-06-27 16:32:30,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 79 [2024-06-27 16:32:30,923 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:30,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327607639] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:30,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:30,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-06-27 16:32:30,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790575186] [2024-06-27 16:32:30,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:30,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 16:32:30,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:30,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 16:32:30,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2024-06-27 16:32:30,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:32:30,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 39 transitions, 277 flow. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 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 16:32:30,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:30,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:32:30,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:31,442 INFO L124 PetriNetUnfolderBase]: 140/266 cut-off events. [2024-06-27 16:32:31,442 INFO L125 PetriNetUnfolderBase]: For 776/776 co-relation queries the response was YES. [2024-06-27 16:32:31,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1057 conditions, 266 events. 140/266 cut-off events. For 776/776 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 846 event pairs, 12 based on Foata normal form. 5/241 useless extension candidates. Maximal degree in co-relation 980. Up to 99 conditions per place. [2024-06-27 16:32:31,443 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 57 selfloop transitions, 21 changer transitions 13/92 dead transitions. [2024-06-27 16:32:31,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 92 transitions, 731 flow [2024-06-27 16:32:31,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 16:32:31,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 16:32:31,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 118 transitions. [2024-06-27 16:32:31,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3575757575757576 [2024-06-27 16:32:31,445 INFO L175 Difference]: Start difference. First operand has 53 places, 39 transitions, 277 flow. Second operand 15 states and 118 transitions. [2024-06-27 16:32:31,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 92 transitions, 731 flow [2024-06-27 16:32:31,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 92 transitions, 674 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 16:32:31,448 INFO L231 Difference]: Finished difference. Result has 69 places, 50 transitions, 408 flow [2024-06-27 16:32:31,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=408, PETRI_PLACES=69, PETRI_TRANSITIONS=50} [2024-06-27 16:32:31,448 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 47 predicate places. [2024-06-27 16:32:31,449 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 50 transitions, 408 flow [2024-06-27 16:32:31,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 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 16:32:31,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:31,449 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:31,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-06-27 16:32:31,677 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,SelfDestructingSolverStorable9 [2024-06-27 16:32:31,677 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 16:32:31,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:31,678 INFO L85 PathProgramCache]: Analyzing trace with hash 200974240, now seen corresponding path program 2 times [2024-06-27 16:32:31,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:31,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833469651] [2024-06-27 16:32:31,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:31,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:31,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:32,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:32,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833469651] [2024-06-27 16:32:32,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833469651] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:32,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443138078] [2024-06-27 16:32:32,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:32:32,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:32,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:32,268 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 16:32:32,294 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 16:32:32,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:32:32,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:32,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:32:32,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:32,470 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:32:32,470 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 27 treesize of output 19 [2024-06-27 16:32:32,495 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:32,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:32,759 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-06-27 16:32:32,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-06-27 16:32:32,832 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:32,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443138078] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:32,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:32,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2024-06-27 16:32:32,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894163281] [2024-06-27 16:32:32,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:32,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 16:32:32,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:32,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 16:32:32,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-06-27 16:32:32,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:32:32,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 50 transitions, 408 flow. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 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 16:32:32,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:32,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:32:32,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:33,249 INFO L124 PetriNetUnfolderBase]: 152/283 cut-off events. [2024-06-27 16:32:33,249 INFO L125 PetriNetUnfolderBase]: For 1038/1038 co-relation queries the response was YES. [2024-06-27 16:32:33,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1289 conditions, 283 events. 152/283 cut-off events. For 1038/1038 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 900 event pairs, 17 based on Foata normal form. 1/272 useless extension candidates. Maximal degree in co-relation 1205. Up to 208 conditions per place. [2024-06-27 16:32:33,251 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 51 selfloop transitions, 23 changer transitions 3/78 dead transitions. [2024-06-27 16:32:33,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 78 transitions, 708 flow [2024-06-27 16:32:33,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:32:33,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:32:33,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 91 transitions. [2024-06-27 16:32:33,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-06-27 16:32:33,252 INFO L175 Difference]: Start difference. First operand has 69 places, 50 transitions, 408 flow. Second operand 13 states and 91 transitions. [2024-06-27 16:32:33,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 78 transitions, 708 flow [2024-06-27 16:32:33,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 78 transitions, 625 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 16:32:33,256 INFO L231 Difference]: Finished difference. Result has 77 places, 60 transitions, 481 flow [2024-06-27 16:32:33,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=481, PETRI_PLACES=77, PETRI_TRANSITIONS=60} [2024-06-27 16:32:33,257 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 55 predicate places. [2024-06-27 16:32:33,257 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 60 transitions, 481 flow [2024-06-27 16:32:33,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 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 16:32:33,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:33,257 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:33,268 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 16:32:33,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:33,468 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 16:32:33,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:33,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1060443416, now seen corresponding path program 3 times [2024-06-27 16:32:33,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:33,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602499380] [2024-06-27 16:32:33,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:33,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:33,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:33,959 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:33,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:33,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602499380] [2024-06-27 16:32:33,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602499380] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:33,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949204456] [2024-06-27 16:32:33,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:32:33,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:33,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:33,962 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 16:32:33,988 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 16:32:34,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:32:34,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:34,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:32:34,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:34,108 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:32:34,108 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 27 treesize of output 19 [2024-06-27 16:32:34,144 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:34,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:34,401 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-06-27 16:32:34,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-06-27 16:32:34,475 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:34,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949204456] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:34,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:34,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2024-06-27 16:32:34,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965452423] [2024-06-27 16:32:34,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:34,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 16:32:34,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:34,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 16:32:34,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2024-06-27 16:32:34,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:32:34,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 60 transitions, 481 flow. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 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 16:32:34,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:34,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:32:34,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:34,788 INFO L124 PetriNetUnfolderBase]: 154/291 cut-off events. [2024-06-27 16:32:34,788 INFO L125 PetriNetUnfolderBase]: For 1099/1099 co-relation queries the response was YES. [2024-06-27 16:32:34,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1324 conditions, 291 events. 154/291 cut-off events. For 1099/1099 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 960 event pairs, 20 based on Foata normal form. 1/280 useless extension candidates. Maximal degree in co-relation 1255. Up to 205 conditions per place. [2024-06-27 16:32:34,790 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 51 selfloop transitions, 24 changer transitions 2/78 dead transitions. [2024-06-27 16:32:34,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 78 transitions, 722 flow [2024-06-27 16:32:34,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 16:32:34,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 16:32:34,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 85 transitions. [2024-06-27 16:32:34,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32196969696969696 [2024-06-27 16:32:34,791 INFO L175 Difference]: Start difference. First operand has 77 places, 60 transitions, 481 flow. Second operand 12 states and 85 transitions. [2024-06-27 16:32:34,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 78 transitions, 722 flow [2024-06-27 16:32:34,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 78 transitions, 650 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 16:32:34,795 INFO L231 Difference]: Finished difference. Result has 84 places, 63 transitions, 500 flow [2024-06-27 16:32:34,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=500, PETRI_PLACES=84, PETRI_TRANSITIONS=63} [2024-06-27 16:32:34,796 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 62 predicate places. [2024-06-27 16:32:34,796 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 63 transitions, 500 flow [2024-06-27 16:32:34,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 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 16:32:34,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:34,797 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:34,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-06-27 16:32:35,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:35,019 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 16:32:35,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:35,020 INFO L85 PathProgramCache]: Analyzing trace with hash 988624800, now seen corresponding path program 4 times [2024-06-27 16:32:35,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:35,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759831701] [2024-06-27 16:32:35,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:35,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:35,612 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:35,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:35,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759831701] [2024-06-27 16:32:35,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759831701] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:35,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052584184] [2024-06-27 16:32:35,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:32:35,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:35,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:35,614 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 16:32:35,641 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 16:32:35,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:32:35,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:35,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 16:32:35,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:35,780 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:32:35,781 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 27 treesize of output 23 [2024-06-27 16:32:35,811 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:35,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:36,123 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-06-27 16:32:36,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-06-27 16:32:36,212 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:36,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052584184] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:36,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:36,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-06-27 16:32:36,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724760056] [2024-06-27 16:32:36,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:36,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 16:32:36,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:36,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 16:32:36,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2024-06-27 16:32:36,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:32:36,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 63 transitions, 500 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 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 16:32:36,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:36,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:32:36,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:36,634 INFO L124 PetriNetUnfolderBase]: 165/313 cut-off events. [2024-06-27 16:32:36,634 INFO L125 PetriNetUnfolderBase]: For 1191/1191 co-relation queries the response was YES. [2024-06-27 16:32:36,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1455 conditions, 313 events. 165/313 cut-off events. For 1191/1191 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1082 event pairs, 22 based on Foata normal form. 4/305 useless extension candidates. Maximal degree in co-relation 1374. Up to 229 conditions per place. [2024-06-27 16:32:36,636 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 57 selfloop transitions, 22 changer transitions 8/88 dead transitions. [2024-06-27 16:32:36,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 88 transitions, 819 flow [2024-06-27 16:32:36,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:32:36,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:32:36,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 92 transitions. [2024-06-27 16:32:36,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32167832167832167 [2024-06-27 16:32:36,638 INFO L175 Difference]: Start difference. First operand has 84 places, 63 transitions, 500 flow. Second operand 13 states and 92 transitions. [2024-06-27 16:32:36,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 88 transitions, 819 flow [2024-06-27 16:32:36,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 88 transitions, 780 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 16:32:36,648 INFO L231 Difference]: Finished difference. Result has 91 places, 68 transitions, 575 flow [2024-06-27 16:32:36,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=575, PETRI_PLACES=91, PETRI_TRANSITIONS=68} [2024-06-27 16:32:36,649 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 69 predicate places. [2024-06-27 16:32:36,649 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 68 transitions, 575 flow [2024-06-27 16:32:36,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 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 16:32:36,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:36,650 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:36,672 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 16:32:36,860 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,SelfDestructingSolverStorable12 [2024-06-27 16:32:36,861 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 16:32:36,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:36,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1588593436, now seen corresponding path program 5 times [2024-06-27 16:32:36,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:36,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430423740] [2024-06-27 16:32:36,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:36,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:37,378 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:37,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:37,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430423740] [2024-06-27 16:32:37,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430423740] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:37,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996725426] [2024-06-27 16:32:37,379 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:32:37,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:37,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:37,380 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 16:32:37,408 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 16:32:37,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:32:37,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:37,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 16:32:37,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:37,614 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:32:37,615 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 27 treesize of output 23 [2024-06-27 16:32:37,652 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:37,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:37,946 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-06-27 16:32:37,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-06-27 16:32:38,020 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:38,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996725426] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:38,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:38,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 24 [2024-06-27 16:32:38,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833225398] [2024-06-27 16:32:38,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:38,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 16:32:38,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:38,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 16:32:38,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2024-06-27 16:32:38,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:32:38,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 68 transitions, 575 flow. Second operand has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 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 16:32:38,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:38,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:32:38,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:38,414 INFO L124 PetriNetUnfolderBase]: 164/309 cut-off events. [2024-06-27 16:32:38,414 INFO L125 PetriNetUnfolderBase]: For 1570/1570 co-relation queries the response was YES. [2024-06-27 16:32:38,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1544 conditions, 309 events. 164/309 cut-off events. For 1570/1570 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1052 event pairs, 24 based on Foata normal form. 1/298 useless extension candidates. Maximal degree in co-relation 1457. Up to 228 conditions per place. [2024-06-27 16:32:38,416 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 58 selfloop transitions, 25 changer transitions 3/87 dead transitions. [2024-06-27 16:32:38,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 87 transitions, 857 flow [2024-06-27 16:32:38,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:32:38,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:32:38,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 89 transitions. [2024-06-27 16:32:38,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3111888111888112 [2024-06-27 16:32:38,417 INFO L175 Difference]: Start difference. First operand has 91 places, 68 transitions, 575 flow. Second operand 13 states and 89 transitions. [2024-06-27 16:32:38,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 87 transitions, 857 flow [2024-06-27 16:32:38,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 87 transitions, 796 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-27 16:32:38,423 INFO L231 Difference]: Finished difference. Result has 94 places, 71 transitions, 619 flow [2024-06-27 16:32:38,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=619, PETRI_PLACES=94, PETRI_TRANSITIONS=71} [2024-06-27 16:32:38,424 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 72 predicate places. [2024-06-27 16:32:38,424 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 71 transitions, 619 flow [2024-06-27 16:32:38,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 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 16:32:38,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:38,424 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:38,436 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 16:32:38,635 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,SelfDestructingSolverStorable13 [2024-06-27 16:32:38,636 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 16:32:38,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:38,636 INFO L85 PathProgramCache]: Analyzing trace with hash 2026960210, now seen corresponding path program 6 times [2024-06-27 16:32:38,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:38,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049918976] [2024-06-27 16:32:38,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:38,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:38,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:39,096 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:39,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:39,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049918976] [2024-06-27 16:32:39,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049918976] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:39,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239003719] [2024-06-27 16:32:39,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:32:39,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:39,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:39,113 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 16:32:39,128 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 16:32:39,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:32:39,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:39,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:32:39,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:39,321 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:32:39,322 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 27 treesize of output 19 [2024-06-27 16:32:39,348 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:39,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:39,613 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-06-27 16:32:39,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 79 [2024-06-27 16:32:39,647 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:39,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239003719] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:39,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:39,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2024-06-27 16:32:39,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397931070] [2024-06-27 16:32:39,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:39,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 16:32:39,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:39,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 16:32:39,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2024-06-27 16:32:39,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:32:39,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 71 transitions, 619 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 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 16:32:39,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:39,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:32:39,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:40,214 INFO L124 PetriNetUnfolderBase]: 224/418 cut-off events. [2024-06-27 16:32:40,215 INFO L125 PetriNetUnfolderBase]: For 2831/2831 co-relation queries the response was YES. [2024-06-27 16:32:40,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2235 conditions, 418 events. 224/418 cut-off events. For 2831/2831 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1606 event pairs, 26 based on Foata normal form. 1/403 useless extension candidates. Maximal degree in co-relation 2146. Up to 161 conditions per place. [2024-06-27 16:32:40,217 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 76 selfloop transitions, 38 changer transitions 6/121 dead transitions. [2024-06-27 16:32:40,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 121 transitions, 1247 flow [2024-06-27 16:32:40,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 16:32:40,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 16:32:40,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 104 transitions. [2024-06-27 16:32:40,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33766233766233766 [2024-06-27 16:32:40,219 INFO L175 Difference]: Start difference. First operand has 94 places, 71 transitions, 619 flow. Second operand 14 states and 104 transitions. [2024-06-27 16:32:40,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 121 transitions, 1247 flow [2024-06-27 16:32:40,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 121 transitions, 1156 flow, removed 15 selfloop flow, removed 11 redundant places. [2024-06-27 16:32:40,226 INFO L231 Difference]: Finished difference. Result has 100 places, 83 transitions, 804 flow [2024-06-27 16:32:40,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=804, PETRI_PLACES=100, PETRI_TRANSITIONS=83} [2024-06-27 16:32:40,227 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 78 predicate places. [2024-06-27 16:32:40,227 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 83 transitions, 804 flow [2024-06-27 16:32:40,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 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 16:32:40,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:40,228 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:40,245 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 16:32:40,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-06-27 16:32:40,446 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 16:32:40,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:40,446 INFO L85 PathProgramCache]: Analyzing trace with hash 24937234, now seen corresponding path program 7 times [2024-06-27 16:32:40,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:40,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743887142] [2024-06-27 16:32:40,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:40,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:40,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:40,981 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:40,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:40,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743887142] [2024-06-27 16:32:40,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743887142] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:40,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691845699] [2024-06-27 16:32:40,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:32:40,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:40,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:40,991 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 16:32:41,020 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 16:32:41,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:41,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 16:32:41,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:41,182 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:32:41,182 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 27 treesize of output 23 [2024-06-27 16:32:41,207 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:41,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:41,482 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-06-27 16:32:41,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-06-27 16:32:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:41,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691845699] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:41,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:41,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-06-27 16:32:41,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531951666] [2024-06-27 16:32:41,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:41,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 16:32:41,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:41,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 16:32:41,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2024-06-27 16:32:41,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:32:41,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 83 transitions, 804 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 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 16:32:41,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:41,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:32:41,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:41,860 INFO L124 PetriNetUnfolderBase]: 235/440 cut-off events. [2024-06-27 16:32:41,860 INFO L125 PetriNetUnfolderBase]: For 3488/3488 co-relation queries the response was YES. [2024-06-27 16:32:41,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2503 conditions, 440 events. 235/440 cut-off events. For 3488/3488 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1704 event pairs, 69 based on Foata normal form. 4/428 useless extension candidates. Maximal degree in co-relation 2410. Up to 353 conditions per place. [2024-06-27 16:32:41,873 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 75 selfloop transitions, 24 changer transitions 8/108 dead transitions. [2024-06-27 16:32:41,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 108 transitions, 1181 flow [2024-06-27 16:32:41,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:32:41,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:32:41,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 91 transitions. [2024-06-27 16:32:41,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-06-27 16:32:41,887 INFO L175 Difference]: Start difference. First operand has 100 places, 83 transitions, 804 flow. Second operand 13 states and 91 transitions. [2024-06-27 16:32:41,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 108 transitions, 1181 flow [2024-06-27 16:32:41,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 108 transitions, 998 flow, removed 61 selfloop flow, removed 9 redundant places. [2024-06-27 16:32:41,897 INFO L231 Difference]: Finished difference. Result has 107 places, 90 transitions, 786 flow [2024-06-27 16:32:41,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=786, PETRI_PLACES=107, PETRI_TRANSITIONS=90} [2024-06-27 16:32:41,897 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 85 predicate places. [2024-06-27 16:32:41,898 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 90 transitions, 786 flow [2024-06-27 16:32:41,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 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 16:32:41,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:41,898 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:41,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-06-27 16:32:42,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-06-27 16:32:42,112 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 16:32:42,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:42,112 INFO L85 PathProgramCache]: Analyzing trace with hash -933415756, now seen corresponding path program 8 times [2024-06-27 16:32:42,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:42,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932486717] [2024-06-27 16:32:42,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:42,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:42,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:42,592 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:42,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:42,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932486717] [2024-06-27 16:32:42,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932486717] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:42,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196555584] [2024-06-27 16:32:42,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:32:42,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:42,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:42,594 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 16:32:42,596 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 16:32:42,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:32:42,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:42,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:32:42,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:42,790 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:32:42,790 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 27 treesize of output 19 [2024-06-27 16:32:42,823 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:42,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:43,095 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-06-27 16:32:43,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-06-27 16:32:43,164 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:43,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196555584] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:43,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:43,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2024-06-27 16:32:43,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810374474] [2024-06-27 16:32:43,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:43,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 16:32:43,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:43,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 16:32:43,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-06-27 16:32:43,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:32:43,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 90 transitions, 786 flow. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 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 16:32:43,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:43,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:32:43,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:43,496 INFO L124 PetriNetUnfolderBase]: 237/441 cut-off events. [2024-06-27 16:32:43,497 INFO L125 PetriNetUnfolderBase]: For 2479/2479 co-relation queries the response was YES. [2024-06-27 16:32:43,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2236 conditions, 441 events. 237/441 cut-off events. For 2479/2479 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1707 event pairs, 63 based on Foata normal form. 1/426 useless extension candidates. Maximal degree in co-relation 2142. Up to 354 conditions per place. [2024-06-27 16:32:43,501 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 82 selfloop transitions, 28 changer transitions 3/114 dead transitions. [2024-06-27 16:32:43,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 114 transitions, 1198 flow [2024-06-27 16:32:43,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:32:43,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:32:43,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 90 transitions. [2024-06-27 16:32:43,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3146853146853147 [2024-06-27 16:32:43,502 INFO L175 Difference]: Start difference. First operand has 107 places, 90 transitions, 786 flow. Second operand 13 states and 90 transitions. [2024-06-27 16:32:43,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 114 transitions, 1198 flow [2024-06-27 16:32:43,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 114 transitions, 1143 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 16:32:43,517 INFO L231 Difference]: Finished difference. Result has 112 places, 98 transitions, 917 flow [2024-06-27 16:32:43,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=735, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=917, PETRI_PLACES=112, PETRI_TRANSITIONS=98} [2024-06-27 16:32:43,517 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 90 predicate places. [2024-06-27 16:32:43,517 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 98 transitions, 917 flow [2024-06-27 16:32:43,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 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 16:32:43,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:43,518 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:43,531 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 16:32:43,731 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,SelfDestructingSolverStorable16 [2024-06-27 16:32:43,732 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 16:32:43,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:43,732 INFO L85 PathProgramCache]: Analyzing trace with hash -73946580, now seen corresponding path program 9 times [2024-06-27 16:32:43,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:43,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866021210] [2024-06-27 16:32:43,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:43,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:43,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:44,218 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:44,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:44,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866021210] [2024-06-27 16:32:44,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866021210] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:44,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064571064] [2024-06-27 16:32:44,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:32:44,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:44,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:44,220 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 16:32:44,250 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 16:32:44,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:32:44,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:44,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:32:44,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:44,408 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:32:44,408 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 27 treesize of output 19 [2024-06-27 16:32:44,462 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:44,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:44,719 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-06-27 16:32:44,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-06-27 16:32:44,791 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:44,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064571064] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:44,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:44,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2024-06-27 16:32:44,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488981094] [2024-06-27 16:32:44,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:44,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 16:32:44,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:44,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 16:32:44,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2024-06-27 16:32:44,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:32:44,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 98 transitions, 917 flow. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 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 16:32:44,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:44,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:32:44,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:45,207 INFO L124 PetriNetUnfolderBase]: 236/444 cut-off events. [2024-06-27 16:32:45,208 INFO L125 PetriNetUnfolderBase]: For 2461/2461 co-relation queries the response was YES. [2024-06-27 16:32:45,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2279 conditions, 444 events. 236/444 cut-off events. For 2461/2461 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1738 event pairs, 64 based on Foata normal form. 1/429 useless extension candidates. Maximal degree in co-relation 2185. Up to 346 conditions per place. [2024-06-27 16:32:45,211 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 82 selfloop transitions, 29 changer transitions 2/114 dead transitions. [2024-06-27 16:32:45,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 114 transitions, 1237 flow [2024-06-27 16:32:45,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 16:32:45,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 16:32:45,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 84 transitions. [2024-06-27 16:32:45,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-06-27 16:32:45,212 INFO L175 Difference]: Start difference. First operand has 112 places, 98 transitions, 917 flow. Second operand 12 states and 84 transitions. [2024-06-27 16:32:45,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 114 transitions, 1237 flow [2024-06-27 16:32:45,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 114 transitions, 1121 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-27 16:32:45,222 INFO L231 Difference]: Finished difference. Result has 117 places, 101 transitions, 931 flow [2024-06-27 16:32:45,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=931, PETRI_PLACES=117, PETRI_TRANSITIONS=101} [2024-06-27 16:32:45,222 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 95 predicate places. [2024-06-27 16:32:45,222 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 101 transitions, 931 flow [2024-06-27 16:32:45,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 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 16:32:45,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:45,223 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:45,250 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 16:32:45,434 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,SelfDestructingSolverStorable17 [2024-06-27 16:32:45,434 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 16:32:45,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:45,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1655100754, now seen corresponding path program 10 times [2024-06-27 16:32:45,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:45,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200265064] [2024-06-27 16:32:45,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:45,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:45,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:45,931 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:45,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:45,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200265064] [2024-06-27 16:32:45,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200265064] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:45,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722218223] [2024-06-27 16:32:45,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:32:45,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:45,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:45,933 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 16:32:45,956 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 16:32:46,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:32:46,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:46,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 16:32:46,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:46,100 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:32:46,100 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 27 treesize of output 23 [2024-06-27 16:32:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:46,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:46,413 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-06-27 16:32:46,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-06-27 16:32:46,480 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:46,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722218223] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:46,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:46,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-06-27 16:32:46,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227416012] [2024-06-27 16:32:46,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:46,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 16:32:46,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:46,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 16:32:46,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2024-06-27 16:32:46,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:32:46,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 101 transitions, 931 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 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 16:32:46,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:46,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:32:46,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:46,852 INFO L124 PetriNetUnfolderBase]: 231/437 cut-off events. [2024-06-27 16:32:46,852 INFO L125 PetriNetUnfolderBase]: For 2468/2468 co-relation queries the response was YES. [2024-06-27 16:32:46,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2220 conditions, 437 events. 231/437 cut-off events. For 2468/2468 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1716 event pairs, 65 based on Foata normal form. 6/427 useless extension candidates. Maximal degree in co-relation 2125. Up to 354 conditions per place. [2024-06-27 16:32:46,856 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 85 selfloop transitions, 23 changer transitions 7/116 dead transitions. [2024-06-27 16:32:46,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 116 transitions, 1225 flow [2024-06-27 16:32:46,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 16:32:46,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 16:32:46,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 85 transitions. [2024-06-27 16:32:46,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32196969696969696 [2024-06-27 16:32:46,857 INFO L175 Difference]: Start difference. First operand has 117 places, 101 transitions, 931 flow. Second operand 12 states and 85 transitions. [2024-06-27 16:32:46,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 116 transitions, 1225 flow [2024-06-27 16:32:46,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 116 transitions, 1142 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-27 16:32:46,866 INFO L231 Difference]: Finished difference. Result has 121 places, 100 transitions, 894 flow [2024-06-27 16:32:46,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=848, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=894, PETRI_PLACES=121, PETRI_TRANSITIONS=100} [2024-06-27 16:32:46,867 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 99 predicate places. [2024-06-27 16:32:46,867 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 100 transitions, 894 flow [2024-06-27 16:32:46,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 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 16:32:46,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:46,867 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:46,878 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 16:32:47,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:47,078 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 16:32:47,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:47,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1541303714, now seen corresponding path program 11 times [2024-06-27 16:32:47,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:47,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790455819] [2024-06-27 16:32:47,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:47,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:47,554 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:47,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:47,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790455819] [2024-06-27 16:32:47,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790455819] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:47,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801579634] [2024-06-27 16:32:47,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:32:47,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:47,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:47,556 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 16:32:47,557 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 16:32:47,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:32:47,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:47,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 16:32:47,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:47,889 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:32:47,889 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 46 treesize of output 34 [2024-06-27 16:32:47,928 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:47,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:48,063 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-06-27 16:32:48,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-06-27 16:32:48,100 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:48,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801579634] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:48,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:48,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 20 [2024-06-27 16:32:48,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541452971] [2024-06-27 16:32:48,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:48,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 16:32:48,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:48,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 16:32:48,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2024-06-27 16:32:48,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:32:48,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 100 transitions, 894 flow. Second operand has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 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 16:32:48,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:48,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:32:48,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:48,367 INFO L124 PetriNetUnfolderBase]: 235/445 cut-off events. [2024-06-27 16:32:48,367 INFO L125 PetriNetUnfolderBase]: For 2365/2365 co-relation queries the response was YES. [2024-06-27 16:32:48,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2223 conditions, 445 events. 235/445 cut-off events. For 2365/2365 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1751 event pairs, 55 based on Foata normal form. 4/433 useless extension candidates. Maximal degree in co-relation 2126. Up to 166 conditions per place. [2024-06-27 16:32:48,370 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 83 selfloop transitions, 40 changer transitions 1/125 dead transitions. [2024-06-27 16:32:48,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 125 transitions, 1289 flow [2024-06-27 16:32:48,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:32:48,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:32:48,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 81 transitions. [2024-06-27 16:32:48,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-27 16:32:48,372 INFO L175 Difference]: Start difference. First operand has 121 places, 100 transitions, 894 flow. Second operand 9 states and 81 transitions. [2024-06-27 16:32:48,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 125 transitions, 1289 flow [2024-06-27 16:32:48,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 125 transitions, 1229 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-27 16:32:48,381 INFO L231 Difference]: Finished difference. Result has 118 places, 101 transitions, 942 flow [2024-06-27 16:32:48,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=942, PETRI_PLACES=118, PETRI_TRANSITIONS=101} [2024-06-27 16:32:48,382 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 96 predicate places. [2024-06-27 16:32:48,382 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 101 transitions, 942 flow [2024-06-27 16:32:48,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 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 16:32:48,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:48,382 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:48,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-06-27 16:32:48,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:48,588 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 16:32:48,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:48,589 INFO L85 PathProgramCache]: Analyzing trace with hash 191405013, now seen corresponding path program 12 times [2024-06-27 16:32:48,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:48,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719594344] [2024-06-27 16:32:48,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:48,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:48,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:48,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719594344] [2024-06-27 16:32:48,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719594344] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:48,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909752230] [2024-06-27 16:32:48,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:32:48,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:48,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:48,945 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 16:32:48,981 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 16:32:49,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:32:49,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:49,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 16:32:49,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:49,145 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 16:32:49,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-06-27 16:32:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:49,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:49,247 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-06-27 16:32:49,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-06-27 16:32:49,262 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:49,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909752230] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:49,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:49,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2024-06-27 16:32:49,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497515287] [2024-06-27 16:32:49,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:49,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 16:32:49,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:49,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 16:32:49,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-06-27 16:32:49,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:32:49,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 101 transitions, 942 flow. Second operand has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 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 16:32:49,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:49,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:32:49,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:49,488 INFO L124 PetriNetUnfolderBase]: 249/469 cut-off events. [2024-06-27 16:32:49,488 INFO L125 PetriNetUnfolderBase]: For 2602/2602 co-relation queries the response was YES. [2024-06-27 16:32:49,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2399 conditions, 469 events. 249/469 cut-off events. For 2602/2602 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 1887 event pairs, 33 based on Foata normal form. 5/454 useless extension candidates. Maximal degree in co-relation 2303. Up to 210 conditions per place. [2024-06-27 16:32:49,492 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 90 selfloop transitions, 40 changer transitions 0/131 dead transitions. [2024-06-27 16:32:49,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 131 transitions, 1386 flow [2024-06-27 16:32:49,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 16:32:49,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 16:32:49,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 84 transitions. [2024-06-27 16:32:49,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-06-27 16:32:49,494 INFO L175 Difference]: Start difference. First operand has 118 places, 101 transitions, 942 flow. Second operand 10 states and 84 transitions. [2024-06-27 16:32:49,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 131 transitions, 1386 flow [2024-06-27 16:32:49,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 131 transitions, 1321 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 16:32:49,536 INFO L231 Difference]: Finished difference. Result has 123 places, 103 transitions, 999 flow [2024-06-27 16:32:49,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=999, PETRI_PLACES=123, PETRI_TRANSITIONS=103} [2024-06-27 16:32:49,537 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 101 predicate places. [2024-06-27 16:32:49,537 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 103 transitions, 999 flow [2024-06-27 16:32:49,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 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 16:32:49,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:49,537 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:49,550 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 16:32:49,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:49,748 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 16:32:49,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:49,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1611925751, now seen corresponding path program 13 times [2024-06-27 16:32:49,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:49,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854295197] [2024-06-27 16:32:49,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:49,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:50,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:50,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854295197] [2024-06-27 16:32:50,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854295197] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:50,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762382001] [2024-06-27 16:32:50,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:32:50,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:50,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:50,340 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 16:32:50,341 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 16:32:50,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:50,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 16:32:50,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:50,519 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:32:50,519 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 65 treesize of output 45 [2024-06-27 16:32:50,551 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:50,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:50,664 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-06-27 16:32:50,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-06-27 16:32:50,674 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:50,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762382001] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:50,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:50,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-06-27 16:32:50,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235848544] [2024-06-27 16:32:50,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:50,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 16:32:50,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:50,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 16:32:50,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-06-27 16:32:50,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:32:50,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 103 transitions, 999 flow. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 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 16:32:50,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:50,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:32:50,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:51,080 INFO L124 PetriNetUnfolderBase]: 266/504 cut-off events. [2024-06-27 16:32:51,080 INFO L125 PetriNetUnfolderBase]: For 3105/3105 co-relation queries the response was YES. [2024-06-27 16:32:51,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2649 conditions, 504 events. 266/504 cut-off events. For 3105/3105 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2111 event pairs, 29 based on Foata normal form. 2/482 useless extension candidates. Maximal degree in co-relation 2550. Up to 189 conditions per place. [2024-06-27 16:32:51,086 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 93 selfloop transitions, 47 changer transitions 5/146 dead transitions. [2024-06-27 16:32:51,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 146 transitions, 1548 flow [2024-06-27 16:32:51,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 16:32:51,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 16:32:51,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 116 transitions. [2024-06-27 16:32:51,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37662337662337664 [2024-06-27 16:32:51,100 INFO L175 Difference]: Start difference. First operand has 123 places, 103 transitions, 999 flow. Second operand 14 states and 116 transitions. [2024-06-27 16:32:51,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 146 transitions, 1548 flow [2024-06-27 16:32:51,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 146 transitions, 1412 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-27 16:32:51,115 INFO L231 Difference]: Finished difference. Result has 131 places, 106 transitions, 1034 flow [2024-06-27 16:32:51,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=863, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1034, PETRI_PLACES=131, PETRI_TRANSITIONS=106} [2024-06-27 16:32:51,116 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 109 predicate places. [2024-06-27 16:32:51,116 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 106 transitions, 1034 flow [2024-06-27 16:32:51,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 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 16:32:51,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:51,124 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:51,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-06-27 16:32:51,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:51,336 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 16:32:51,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:51,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1724688555, now seen corresponding path program 14 times [2024-06-27 16:32:51,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:51,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552010364] [2024-06-27 16:32:51,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:51,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:51,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:51,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:51,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552010364] [2024-06-27 16:32:51,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552010364] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:51,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512212681] [2024-06-27 16:32:51,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:32:51,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:51,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:51,814 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 16:32:51,852 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 16:32:51,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:32:51,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:51,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 16:32:51,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:52,089 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 16:32:52,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-06-27 16:32:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:52,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:52,215 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-06-27 16:32:52,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-06-27 16:32:52,231 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:52,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512212681] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:52,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:52,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-06-27 16:32:52,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151124332] [2024-06-27 16:32:52,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:52,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 16:32:52,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:52,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 16:32:52,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-06-27 16:32:52,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:32:52,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 106 transitions, 1034 flow. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 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 16:32:52,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:52,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:32:52,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:52,569 INFO L124 PetriNetUnfolderBase]: 282/529 cut-off events. [2024-06-27 16:32:52,569 INFO L125 PetriNetUnfolderBase]: For 3448/3448 co-relation queries the response was YES. [2024-06-27 16:32:52,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2799 conditions, 529 events. 282/529 cut-off events. For 3448/3448 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2219 event pairs, 39 based on Foata normal form. 5/534 useless extension candidates. Maximal degree in co-relation 2699. Up to 196 conditions per place. [2024-06-27 16:32:52,573 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 94 selfloop transitions, 46 changer transitions 0/141 dead transitions. [2024-06-27 16:32:52,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 141 transitions, 1530 flow [2024-06-27 16:32:52,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 16:32:52,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 16:32:52,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 98 transitions. [2024-06-27 16:32:52,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3712121212121212 [2024-06-27 16:32:52,593 INFO L175 Difference]: Start difference. First operand has 131 places, 106 transitions, 1034 flow. Second operand 12 states and 98 transitions. [2024-06-27 16:32:52,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 141 transitions, 1530 flow [2024-06-27 16:32:52,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 141 transitions, 1383 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-27 16:32:52,605 INFO L231 Difference]: Finished difference. Result has 134 places, 110 transitions, 1053 flow [2024-06-27 16:32:52,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=910, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1053, PETRI_PLACES=134, PETRI_TRANSITIONS=110} [2024-06-27 16:32:52,605 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 112 predicate places. [2024-06-27 16:32:52,605 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 110 transitions, 1053 flow [2024-06-27 16:32:52,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 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 16:32:52,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:52,606 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:52,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-06-27 16:32:52,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:52,822 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 16:32:52,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:52,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1902220609, now seen corresponding path program 15 times [2024-06-27 16:32:52,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:52,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415887165] [2024-06-27 16:32:52,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:52,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:52,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:53,227 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:53,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:53,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415887165] [2024-06-27 16:32:53,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415887165] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:53,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871865062] [2024-06-27 16:32:53,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:32:53,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:53,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:53,229 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 16:32:53,232 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 16:32:53,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:32:53,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:53,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 16:32:53,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:53,464 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:32:53,465 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 46 treesize of output 30 [2024-06-27 16:32:53,497 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:53,498 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:53,612 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-06-27 16:32:53,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-06-27 16:32:53,632 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:53,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871865062] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:53,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:53,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-06-27 16:32:53,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725239487] [2024-06-27 16:32:53,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:53,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 16:32:53,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:53,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 16:32:53,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2024-06-27 16:32:53,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:32:53,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 110 transitions, 1053 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 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 16:32:53,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:53,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:32:53,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:54,042 INFO L124 PetriNetUnfolderBase]: 298/552 cut-off events. [2024-06-27 16:32:54,042 INFO L125 PetriNetUnfolderBase]: For 2761/2761 co-relation queries the response was YES. [2024-06-27 16:32:54,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2842 conditions, 552 events. 298/552 cut-off events. For 2761/2761 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2329 event pairs, 32 based on Foata normal form. 5/557 useless extension candidates. Maximal degree in co-relation 2740. Up to 189 conditions per place. [2024-06-27 16:32:54,047 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 92 selfloop transitions, 53 changer transitions 0/146 dead transitions. [2024-06-27 16:32:54,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 146 transitions, 1534 flow [2024-06-27 16:32:54,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:32:54,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:32:54,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 106 transitions. [2024-06-27 16:32:54,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3706293706293706 [2024-06-27 16:32:54,049 INFO L175 Difference]: Start difference. First operand has 134 places, 110 transitions, 1053 flow. Second operand 13 states and 106 transitions. [2024-06-27 16:32:54,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 146 transitions, 1534 flow [2024-06-27 16:32:54,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 146 transitions, 1428 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-27 16:32:54,058 INFO L231 Difference]: Finished difference. Result has 136 places, 113 transitions, 1097 flow [2024-06-27 16:32:54,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=949, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1097, PETRI_PLACES=136, PETRI_TRANSITIONS=113} [2024-06-27 16:32:54,059 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 114 predicate places. [2024-06-27 16:32:54,059 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 113 transitions, 1097 flow [2024-06-27 16:32:54,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 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 16:32:54,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:54,060 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:54,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-06-27 16:32:54,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:54,271 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 16:32:54,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:54,271 INFO L85 PathProgramCache]: Analyzing trace with hash -957458626, now seen corresponding path program 16 times [2024-06-27 16:32:54,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:54,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656081606] [2024-06-27 16:32:54,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:54,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:54,686 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:54,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:54,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656081606] [2024-06-27 16:32:54,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656081606] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:54,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754991790] [2024-06-27 16:32:54,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:32:54,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:54,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:54,700 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 16:32:54,726 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 16:32:54,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:32:54,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:54,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 16:32:54,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:54,903 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:32:54,903 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 65 treesize of output 45 [2024-06-27 16:32:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:54,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:55,058 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-06-27 16:32:55,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-06-27 16:32:55,079 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:55,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754991790] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:55,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:55,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-06-27 16:32:55,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049643530] [2024-06-27 16:32:55,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:55,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 16:32:55,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:55,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 16:32:55,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-06-27 16:32:55,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:32:55,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 113 transitions, 1097 flow. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 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 16:32:55,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:55,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:32:55,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:55,538 INFO L124 PetriNetUnfolderBase]: 291/536 cut-off events. [2024-06-27 16:32:55,538 INFO L125 PetriNetUnfolderBase]: For 2813/2813 co-relation queries the response was YES. [2024-06-27 16:32:55,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2809 conditions, 536 events. 291/536 cut-off events. For 2813/2813 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2242 event pairs, 78 based on Foata normal form. 3/539 useless extension candidates. Maximal degree in co-relation 2707. Up to 280 conditions per place. [2024-06-27 16:32:55,542 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 89 selfloop transitions, 39 changer transitions 3/132 dead transitions. [2024-06-27 16:32:55,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 132 transitions, 1428 flow [2024-06-27 16:32:55,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 16:32:55,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 16:32:55,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 80 transitions. [2024-06-27 16:32:55,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-27 16:32:55,543 INFO L175 Difference]: Start difference. First operand has 136 places, 113 transitions, 1097 flow. Second operand 10 states and 80 transitions. [2024-06-27 16:32:55,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 132 transitions, 1428 flow [2024-06-27 16:32:55,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 132 transitions, 1322 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-27 16:32:55,552 INFO L231 Difference]: Finished difference. Result has 134 places, 111 transitions, 1053 flow [2024-06-27 16:32:55,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=981, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1053, PETRI_PLACES=134, PETRI_TRANSITIONS=111} [2024-06-27 16:32:55,553 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 112 predicate places. [2024-06-27 16:32:55,553 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 111 transitions, 1053 flow [2024-06-27 16:32:55,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 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 16:32:55,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:55,553 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:55,564 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 16:32:55,764 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,SelfDestructingSolverStorable24 [2024-06-27 16:32:55,764 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 16:32:55,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:55,765 INFO L85 PathProgramCache]: Analyzing trace with hash -646646543, now seen corresponding path program 17 times [2024-06-27 16:32:55,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:55,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744910812] [2024-06-27 16:32:55,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:55,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:55,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:56,107 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:56,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:56,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744910812] [2024-06-27 16:32:56,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744910812] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:56,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284732419] [2024-06-27 16:32:56,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:32:56,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:56,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:56,109 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 16:32:56,124 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 16:32:56,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:32:56,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:56,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 16:32:56,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:56,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:56,478 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:32:56,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-06-27 16:32:56,522 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:56,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284732419] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:56,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:56,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-06-27 16:32:56,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845552519] [2024-06-27 16:32:56,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:56,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 16:32:56,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:56,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 16:32:56,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2024-06-27 16:32:56,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:32:56,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 111 transitions, 1053 flow. Second operand has 21 states, 21 states have (on average 5.333333333333333) internal successors, (112), 21 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 16:32:56,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:56,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:32:56,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:56,785 INFO L124 PetriNetUnfolderBase]: 297/544 cut-off events. [2024-06-27 16:32:56,785 INFO L125 PetriNetUnfolderBase]: For 2969/2969 co-relation queries the response was YES. [2024-06-27 16:32:56,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2808 conditions, 544 events. 297/544 cut-off events. For 2969/2969 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2260 event pairs, 106 based on Foata normal form. 5/549 useless extension candidates. Maximal degree in co-relation 2707. Up to 448 conditions per place. [2024-06-27 16:32:56,790 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 101 selfloop transitions, 25 changer transitions 0/127 dead transitions. [2024-06-27 16:32:56,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 127 transitions, 1382 flow [2024-06-27 16:32:56,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:32:56,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:32:56,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 69 transitions. [2024-06-27 16:32:56,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3484848484848485 [2024-06-27 16:32:56,791 INFO L175 Difference]: Start difference. First operand has 134 places, 111 transitions, 1053 flow. Second operand 9 states and 69 transitions. [2024-06-27 16:32:56,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 127 transitions, 1382 flow [2024-06-27 16:32:56,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 127 transitions, 1300 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 16:32:56,800 INFO L231 Difference]: Finished difference. Result has 132 places, 112 transitions, 1047 flow [2024-06-27 16:32:56,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=973, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1047, PETRI_PLACES=132, PETRI_TRANSITIONS=112} [2024-06-27 16:32:56,801 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 110 predicate places. [2024-06-27 16:32:56,801 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 112 transitions, 1047 flow [2024-06-27 16:32:56,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.333333333333333) internal successors, (112), 21 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 16:32:56,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:56,801 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:56,813 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 16:32:57,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-06-27 16:32:57,013 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 16:32:57,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:57,014 INFO L85 PathProgramCache]: Analyzing trace with hash -56293576, now seen corresponding path program 18 times [2024-06-27 16:32:57,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:57,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635262192] [2024-06-27 16:32:57,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:57,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:57,376 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:57,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:57,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635262192] [2024-06-27 16:32:57,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635262192] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:57,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459127757] [2024-06-27 16:32:57,377 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:32:57,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:57,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:57,378 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 16:32:57,396 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 16:32:57,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 16:32:57,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:32:57,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 16:32:57,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:57,610 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:32:57,610 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 46 treesize of output 30 [2024-06-27 16:32:57,640 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:57,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:57,717 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:32:57,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-06-27 16:32:57,752 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:57,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459127757] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:57,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:57,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-06-27 16:32:57,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689696472] [2024-06-27 16:32:57,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:57,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 16:32:57,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:57,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 16:32:57,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2024-06-27 16:32:57,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:32:57,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 112 transitions, 1047 flow. Second operand has 17 states, 17 states have (on average 5.235294117647059) internal successors, (89), 17 states have internal predecessors, (89), 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 16:32:57,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:57,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:32:57,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:58,004 INFO L124 PetriNetUnfolderBase]: 307/567 cut-off events. [2024-06-27 16:32:58,005 INFO L125 PetriNetUnfolderBase]: For 3202/3202 co-relation queries the response was YES. [2024-06-27 16:32:58,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2887 conditions, 567 events. 307/567 cut-off events. For 3202/3202 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2412 event pairs, 108 based on Foata normal form. 4/571 useless extension candidates. Maximal degree in co-relation 2786. Up to 450 conditions per place. [2024-06-27 16:32:58,009 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 99 selfloop transitions, 28 changer transitions 1/129 dead transitions. [2024-06-27 16:32:58,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 129 transitions, 1386 flow [2024-06-27 16:32:58,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:32:58,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:32:58,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 73 transitions. [2024-06-27 16:32:58,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3686868686868687 [2024-06-27 16:32:58,015 INFO L175 Difference]: Start difference. First operand has 132 places, 112 transitions, 1047 flow. Second operand 9 states and 73 transitions. [2024-06-27 16:32:58,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 129 transitions, 1386 flow [2024-06-27 16:32:58,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 129 transitions, 1295 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-27 16:32:58,025 INFO L231 Difference]: Finished difference. Result has 131 places, 113 transitions, 1039 flow [2024-06-27 16:32:58,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1039, PETRI_PLACES=131, PETRI_TRANSITIONS=113} [2024-06-27 16:32:58,026 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 109 predicate places. [2024-06-27 16:32:58,026 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 113 transitions, 1039 flow [2024-06-27 16:32:58,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.235294117647059) internal successors, (89), 17 states have internal predecessors, (89), 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 16:32:58,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:58,026 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:58,037 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 16:32:58,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-06-27 16:32:58,237 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 16:32:58,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:58,238 INFO L85 PathProgramCache]: Analyzing trace with hash 481562002, now seen corresponding path program 19 times [2024-06-27 16:32:58,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:58,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214491784] [2024-06-27 16:32:58,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:58,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:58,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:58,650 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:58,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:32:58,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214491784] [2024-06-27 16:32:58,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214491784] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:32:58,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163597536] [2024-06-27 16:32:58,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:32:58,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:58,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:32:58,654 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 16:32:58,656 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 16:32:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:32:58,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 21 conjunts are in the unsatisfiable core [2024-06-27 16:32:58,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:32:58,859 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:32:58,860 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 46 treesize of output 34 [2024-06-27 16:32:58,894 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:58,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:32:58,992 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:32:58,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-06-27 16:32:59,021 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:32:59,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163597536] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:32:59,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:32:59,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-06-27 16:32:59,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444124348] [2024-06-27 16:32:59,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:32:59,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 16:32:59,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:32:59,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 16:32:59,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-06-27 16:32:59,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:32:59,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 113 transitions, 1039 flow. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 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 16:32:59,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:32:59,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:32:59,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:32:59,448 INFO L124 PetriNetUnfolderBase]: 331/617 cut-off events. [2024-06-27 16:32:59,448 INFO L125 PetriNetUnfolderBase]: For 3459/3459 co-relation queries the response was YES. [2024-06-27 16:32:59,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3083 conditions, 617 events. 331/617 cut-off events. For 3459/3459 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2727 event pairs, 110 based on Foata normal form. 4/621 useless extension candidates. Maximal degree in co-relation 2984. Up to 467 conditions per place. [2024-06-27 16:32:59,452 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 113 selfloop transitions, 33 changer transitions 2/149 dead transitions. [2024-06-27 16:32:59,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 149 transitions, 1539 flow [2024-06-27 16:32:59,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 16:32:59,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 16:32:59,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 110 transitions. [2024-06-27 16:32:59,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-27 16:32:59,453 INFO L175 Difference]: Start difference. First operand has 131 places, 113 transitions, 1039 flow. Second operand 14 states and 110 transitions. [2024-06-27 16:32:59,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 149 transitions, 1539 flow [2024-06-27 16:32:59,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 149 transitions, 1472 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 16:32:59,463 INFO L231 Difference]: Finished difference. Result has 140 places, 118 transitions, 1133 flow [2024-06-27 16:32:59,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1133, PETRI_PLACES=140, PETRI_TRANSITIONS=118} [2024-06-27 16:32:59,468 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 118 predicate places. [2024-06-27 16:32:59,468 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 118 transitions, 1133 flow [2024-06-27 16:32:59,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 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 16:32:59,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:32:59,469 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:32:59,479 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 16:32:59,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:32:59,676 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 16:32:59,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:32:59,677 INFO L85 PathProgramCache]: Analyzing trace with hash 348102869, now seen corresponding path program 20 times [2024-06-27 16:32:59,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:32:59,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280091502] [2024-06-27 16:32:59,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:32:59,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:32:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:00,077 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:00,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:00,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280091502] [2024-06-27 16:33:00,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280091502] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:00,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126328825] [2024-06-27 16:33:00,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:33:00,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:00,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:00,079 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 16:33:00,080 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 16:33:00,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:33:00,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:00,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 16:33:00,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:00,305 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:33:00,306 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 65 treesize of output 41 [2024-06-27 16:33:00,328 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:00,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:00,407 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:33:00,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-06-27 16:33:00,473 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:00,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126328825] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:00,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:00,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-06-27 16:33:00,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612255206] [2024-06-27 16:33:00,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:00,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 16:33:00,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:00,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 16:33:00,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-06-27 16:33:00,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:00,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 118 transitions, 1133 flow. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 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 16:33:00,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:00,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:00,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:00,731 INFO L124 PetriNetUnfolderBase]: 340/639 cut-off events. [2024-06-27 16:33:00,731 INFO L125 PetriNetUnfolderBase]: For 4243/4243 co-relation queries the response was YES. [2024-06-27 16:33:00,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3297 conditions, 639 events. 340/639 cut-off events. For 4243/4243 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2865 event pairs, 125 based on Foata normal form. 5/644 useless extension candidates. Maximal degree in co-relation 3195. Up to 515 conditions per place. [2024-06-27 16:33:00,736 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 105 selfloop transitions, 28 changer transitions 1/135 dead transitions. [2024-06-27 16:33:00,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 135 transitions, 1490 flow [2024-06-27 16:33:00,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:33:00,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:33:00,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 74 transitions. [2024-06-27 16:33:00,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37373737373737376 [2024-06-27 16:33:00,754 INFO L175 Difference]: Start difference. First operand has 140 places, 118 transitions, 1133 flow. Second operand 9 states and 74 transitions. [2024-06-27 16:33:00,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 135 transitions, 1490 flow [2024-06-27 16:33:00,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 135 transitions, 1380 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-27 16:33:00,767 INFO L231 Difference]: Finished difference. Result has 140 places, 119 transitions, 1107 flow [2024-06-27 16:33:00,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1023, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1107, PETRI_PLACES=140, PETRI_TRANSITIONS=119} [2024-06-27 16:33:00,769 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 118 predicate places. [2024-06-27 16:33:00,769 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 119 transitions, 1107 flow [2024-06-27 16:33:00,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 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 16:33:00,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:00,770 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:00,783 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 16:33:00,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-06-27 16:33:00,980 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 16:33:00,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:00,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1749142699, now seen corresponding path program 21 times [2024-06-27 16:33:00,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:00,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056555205] [2024-06-27 16:33:00,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:00,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:01,358 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:01,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:01,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056555205] [2024-06-27 16:33:01,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056555205] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:01,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745206096] [2024-06-27 16:33:01,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:33:01,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:01,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:01,360 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 16:33:01,361 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 16:33:01,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:33:01,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:01,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 16:33:01,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:01,587 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:33:01,587 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 46 treesize of output 30 [2024-06-27 16:33:01,620 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:01,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:01,736 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:33:01,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-06-27 16:33:01,787 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:01,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745206096] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:01,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:01,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-06-27 16:33:01,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213065188] [2024-06-27 16:33:01,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:01,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 16:33:01,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:01,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 16:33:01,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-06-27 16:33:01,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:01,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 119 transitions, 1107 flow. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 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 16:33:01,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:01,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:01,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:02,128 INFO L124 PetriNetUnfolderBase]: 356/673 cut-off events. [2024-06-27 16:33:02,128 INFO L125 PetriNetUnfolderBase]: For 4122/4122 co-relation queries the response was YES. [2024-06-27 16:33:02,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3379 conditions, 673 events. 356/673 cut-off events. For 4122/4122 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3111 event pairs, 121 based on Foata normal form. 5/678 useless extension candidates. Maximal degree in co-relation 3276. Up to 527 conditions per place. [2024-06-27 16:33:02,133 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 115 selfloop transitions, 33 changer transitions 3/152 dead transitions. [2024-06-27 16:33:02,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 152 transitions, 1567 flow [2024-06-27 16:33:02,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:33:02,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:33:02,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 103 transitions. [2024-06-27 16:33:02,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36013986013986016 [2024-06-27 16:33:02,134 INFO L175 Difference]: Start difference. First operand has 140 places, 119 transitions, 1107 flow. Second operand 13 states and 103 transitions. [2024-06-27 16:33:02,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 152 transitions, 1567 flow [2024-06-27 16:33:02,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 152 transitions, 1497 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 16:33:02,146 INFO L231 Difference]: Finished difference. Result has 147 places, 122 transitions, 1150 flow [2024-06-27 16:33:02,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1150, PETRI_PLACES=147, PETRI_TRANSITIONS=122} [2024-06-27 16:33:02,147 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 125 predicate places. [2024-06-27 16:33:02,147 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 122 transitions, 1150 flow [2024-06-27 16:33:02,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 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 16:33:02,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:02,147 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:02,158 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 16:33:02,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:02,358 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 16:33:02,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:02,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1676819895, now seen corresponding path program 22 times [2024-06-27 16:33:02,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:02,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429792405] [2024-06-27 16:33:02,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:02,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:02,788 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:02,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:02,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429792405] [2024-06-27 16:33:02,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429792405] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:02,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359529856] [2024-06-27 16:33:02,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:33:02,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:02,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:02,813 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 16:33:02,829 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 16:33:02,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:33:02,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:02,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 16:33:02,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:03,055 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:03,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:03,144 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:33:03,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-06-27 16:33:03,191 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:03,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359529856] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:03,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:03,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-06-27 16:33:03,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656676651] [2024-06-27 16:33:03,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:03,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 16:33:03,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:03,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 16:33:03,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-06-27 16:33:03,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:03,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 122 transitions, 1150 flow. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 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 16:33:03,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:03,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:03,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:03,461 INFO L124 PetriNetUnfolderBase]: 354/671 cut-off events. [2024-06-27 16:33:03,462 INFO L125 PetriNetUnfolderBase]: For 3924/3924 co-relation queries the response was YES. [2024-06-27 16:33:03,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3417 conditions, 671 events. 354/671 cut-off events. For 3924/3924 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3102 event pairs, 141 based on Foata normal form. 2/673 useless extension candidates. Maximal degree in co-relation 3312. Up to 586 conditions per place. [2024-06-27 16:33:03,466 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 104 selfloop transitions, 21 changer transitions 7/133 dead transitions. [2024-06-27 16:33:03,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 133 transitions, 1447 flow [2024-06-27 16:33:03,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:33:03,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:33:03,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 66 transitions. [2024-06-27 16:33:03,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-27 16:33:03,467 INFO L175 Difference]: Start difference. First operand has 147 places, 122 transitions, 1150 flow. Second operand 9 states and 66 transitions. [2024-06-27 16:33:03,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 133 transitions, 1447 flow [2024-06-27 16:33:03,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 133 transitions, 1367 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-27 16:33:03,480 INFO L231 Difference]: Finished difference. Result has 146 places, 119 transitions, 1085 flow [2024-06-27 16:33:03,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1058, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1085, PETRI_PLACES=146, PETRI_TRANSITIONS=119} [2024-06-27 16:33:03,481 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 124 predicate places. [2024-06-27 16:33:03,481 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 119 transitions, 1085 flow [2024-06-27 16:33:03,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 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 16:33:03,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:03,482 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:03,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-06-27 16:33:03,692 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,SelfDestructingSolverStorable30 [2024-06-27 16:33:03,692 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 16:33:03,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:03,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1769472311, now seen corresponding path program 23 times [2024-06-27 16:33:03,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:03,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025185567] [2024-06-27 16:33:03,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:03,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:03,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:04,076 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:04,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:04,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025185567] [2024-06-27 16:33:04,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025185567] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:04,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064303601] [2024-06-27 16:33:04,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:33:04,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:04,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:04,078 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 16:33:04,102 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 16:33:04,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:33:04,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:04,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 36 conjunts are in the unsatisfiable core [2024-06-27 16:33:04,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:04,406 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:33:04,406 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 65 treesize of output 45 [2024-06-27 16:33:04,439 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:04,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:04,577 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:33:04,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-06-27 16:33:04,630 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:04,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064303601] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:04,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:04,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2024-06-27 16:33:04,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194427569] [2024-06-27 16:33:04,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:04,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 16:33:04,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:04,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 16:33:04,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2024-06-27 16:33:04,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:04,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 119 transitions, 1085 flow. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 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 16:33:04,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:04,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:04,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:05,135 INFO L124 PetriNetUnfolderBase]: 340/632 cut-off events. [2024-06-27 16:33:05,135 INFO L125 PetriNetUnfolderBase]: For 3588/3588 co-relation queries the response was YES. [2024-06-27 16:33:05,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3187 conditions, 632 events. 340/632 cut-off events. For 3588/3588 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2810 event pairs, 115 based on Foata normal form. 5/637 useless extension candidates. Maximal degree in co-relation 3084. Up to 494 conditions per place. [2024-06-27 16:33:05,140 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 104 selfloop transitions, 29 changer transitions 7/141 dead transitions. [2024-06-27 16:33:05,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 141 transitions, 1453 flow [2024-06-27 16:33:05,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 16:33:05,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 16:33:05,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 93 transitions. [2024-06-27 16:33:05,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3522727272727273 [2024-06-27 16:33:05,141 INFO L175 Difference]: Start difference. First operand has 146 places, 119 transitions, 1085 flow. Second operand 12 states and 93 transitions. [2024-06-27 16:33:05,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 141 transitions, 1453 flow [2024-06-27 16:33:05,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 141 transitions, 1407 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 16:33:05,154 INFO L231 Difference]: Finished difference. Result has 145 places, 115 transitions, 1064 flow [2024-06-27 16:33:05,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1021, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1064, PETRI_PLACES=145, PETRI_TRANSITIONS=115} [2024-06-27 16:33:05,154 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 123 predicate places. [2024-06-27 16:33:05,154 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 115 transitions, 1064 flow [2024-06-27 16:33:05,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 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 16:33:05,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:05,155 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:05,166 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 16:33:05,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:05,366 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 16:33:05,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:05,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1337665969, now seen corresponding path program 24 times [2024-06-27 16:33:05,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:05,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946245404] [2024-06-27 16:33:05,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:05,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:05,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:05,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946245404] [2024-06-27 16:33:05,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946245404] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:05,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246490345] [2024-06-27 16:33:05,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:33:05,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:05,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:05,747 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 16:33:05,748 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 16:33:05,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:33:05,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:05,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 16:33:05,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:06,016 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:33:06,016 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 65 treesize of output 41 [2024-06-27 16:33:06,052 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:06,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:06,155 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:33:06,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-06-27 16:33:06,238 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:06,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246490345] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:06,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:06,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-06-27 16:33:06,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143431656] [2024-06-27 16:33:06,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:06,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 16:33:06,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:06,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 16:33:06,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2024-06-27 16:33:06,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:06,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 115 transitions, 1064 flow. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 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 16:33:06,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:06,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:06,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:06,582 INFO L124 PetriNetUnfolderBase]: 330/605 cut-off events. [2024-06-27 16:33:06,582 INFO L125 PetriNetUnfolderBase]: For 3534/3534 co-relation queries the response was YES. [2024-06-27 16:33:06,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3101 conditions, 605 events. 330/605 cut-off events. For 3534/3534 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2597 event pairs, 114 based on Foata normal form. 2/607 useless extension candidates. Maximal degree in co-relation 3013. Up to 507 conditions per place. [2024-06-27 16:33:06,586 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 100 selfloop transitions, 25 changer transitions 5/131 dead transitions. [2024-06-27 16:33:06,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 131 transitions, 1380 flow [2024-06-27 16:33:06,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 16:33:06,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 16:33:06,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 77 transitions. [2024-06-27 16:33:06,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35 [2024-06-27 16:33:06,603 INFO L175 Difference]: Start difference. First operand has 145 places, 115 transitions, 1064 flow. Second operand 10 states and 77 transitions. [2024-06-27 16:33:06,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 131 transitions, 1380 flow [2024-06-27 16:33:06,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 131 transitions, 1317 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-27 16:33:06,616 INFO L231 Difference]: Finished difference. Result has 140 places, 113 transitions, 1033 flow [2024-06-27 16:33:06,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=990, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1033, PETRI_PLACES=140, PETRI_TRANSITIONS=113} [2024-06-27 16:33:06,616 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 118 predicate places. [2024-06-27 16:33:06,617 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 113 transitions, 1033 flow [2024-06-27 16:33:06,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 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 16:33:06,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:06,617 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:06,628 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 16:33:06,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:06,828 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 16:33:06,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:06,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1289705198, now seen corresponding path program 25 times [2024-06-27 16:33:06,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:06,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938022015] [2024-06-27 16:33:06,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:06,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:06,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:07,167 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:07,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:07,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938022015] [2024-06-27 16:33:07,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938022015] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:07,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538715137] [2024-06-27 16:33:07,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:33:07,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:07,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:07,185 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 16:33:07,200 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 16:33:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:07,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 21 conjunts are in the unsatisfiable core [2024-06-27 16:33:07,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:07,411 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:33:07,412 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 46 treesize of output 34 [2024-06-27 16:33:07,443 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:07,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:07,537 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:33:07,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-06-27 16:33:07,598 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:07,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538715137] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:07,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:07,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-06-27 16:33:07,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071313656] [2024-06-27 16:33:07,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:07,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 16:33:07,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:07,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 16:33:07,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2024-06-27 16:33:07,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:07,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 113 transitions, 1033 flow. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 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 16:33:07,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:07,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:07,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:07,906 INFO L124 PetriNetUnfolderBase]: 315/575 cut-off events. [2024-06-27 16:33:07,906 INFO L125 PetriNetUnfolderBase]: For 3377/3377 co-relation queries the response was YES. [2024-06-27 16:33:07,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2952 conditions, 575 events. 315/575 cut-off events. For 3377/3377 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2425 event pairs, 104 based on Foata normal form. 6/581 useless extension candidates. Maximal degree in co-relation 2863. Up to 467 conditions per place. [2024-06-27 16:33:07,910 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 102 selfloop transitions, 26 changer transitions 3/132 dead transitions. [2024-06-27 16:33:07,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 132 transitions, 1366 flow [2024-06-27 16:33:07,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 16:33:07,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 16:33:07,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 89 transitions. [2024-06-27 16:33:07,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3371212121212121 [2024-06-27 16:33:07,911 INFO L175 Difference]: Start difference. First operand has 140 places, 113 transitions, 1033 flow. Second operand 12 states and 89 transitions. [2024-06-27 16:33:07,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 132 transitions, 1366 flow [2024-06-27 16:33:07,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 132 transitions, 1310 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 16:33:07,922 INFO L231 Difference]: Finished difference. Result has 139 places, 110 transitions, 1007 flow [2024-06-27 16:33:07,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=962, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1007, PETRI_PLACES=139, PETRI_TRANSITIONS=110} [2024-06-27 16:33:07,924 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 117 predicate places. [2024-06-27 16:33:07,924 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 110 transitions, 1007 flow [2024-06-27 16:33:07,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 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 16:33:07,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:07,924 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:07,946 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 16:33:08,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:08,136 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 16:33:08,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:08,136 INFO L85 PathProgramCache]: Analyzing trace with hash -588555722, now seen corresponding path program 26 times [2024-06-27 16:33:08,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:08,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701754286] [2024-06-27 16:33:08,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:08,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:08,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:08,503 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:08,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:08,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701754286] [2024-06-27 16:33:08,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701754286] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:08,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940554040] [2024-06-27 16:33:08,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:33:08,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:08,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:08,505 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 16:33:08,560 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 16:33:08,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:33:08,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:08,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 16:33:08,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:08,779 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 16:33:08,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-06-27 16:33:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:08,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:08,875 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:33:08,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-06-27 16:33:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:08,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940554040] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:08,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:08,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2024-06-27 16:33:08,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019649308] [2024-06-27 16:33:08,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:08,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 16:33:08,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:08,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 16:33:08,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-06-27 16:33:08,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:08,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 110 transitions, 1007 flow. Second operand has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 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 16:33:08,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:08,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:08,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:09,133 INFO L124 PetriNetUnfolderBase]: 315/567 cut-off events. [2024-06-27 16:33:09,133 INFO L125 PetriNetUnfolderBase]: For 3454/3454 co-relation queries the response was YES. [2024-06-27 16:33:09,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2935 conditions, 567 events. 315/567 cut-off events. For 3454/3454 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2355 event pairs, 107 based on Foata normal form. 4/571 useless extension candidates. Maximal degree in co-relation 2833. Up to 482 conditions per place. [2024-06-27 16:33:09,137 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 99 selfloop transitions, 23 changer transitions 0/123 dead transitions. [2024-06-27 16:33:09,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 123 transitions, 1309 flow [2024-06-27 16:33:09,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:33:09,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:33:09,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 67 transitions. [2024-06-27 16:33:09,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3383838383838384 [2024-06-27 16:33:09,138 INFO L175 Difference]: Start difference. First operand has 139 places, 110 transitions, 1007 flow. Second operand 9 states and 67 transitions. [2024-06-27 16:33:09,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 123 transitions, 1309 flow [2024-06-27 16:33:09,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 123 transitions, 1249 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-27 16:33:09,148 INFO L231 Difference]: Finished difference. Result has 134 places, 110 transitions, 1003 flow [2024-06-27 16:33:09,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=945, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1003, PETRI_PLACES=134, PETRI_TRANSITIONS=110} [2024-06-27 16:33:09,149 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 112 predicate places. [2024-06-27 16:33:09,149 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 110 transitions, 1003 flow [2024-06-27 16:33:09,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 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 16:33:09,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:09,149 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:09,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-06-27 16:33:09,359 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,SelfDestructingSolverStorable34 [2024-06-27 16:33:09,360 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 16:33:09,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:09,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1530241592, now seen corresponding path program 27 times [2024-06-27 16:33:09,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:09,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152970974] [2024-06-27 16:33:09,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:09,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:09,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:09,771 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:09,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:09,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152970974] [2024-06-27 16:33:09,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152970974] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:09,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714730581] [2024-06-27 16:33:09,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:33:09,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:09,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:09,772 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 16:33:09,774 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 16:33:09,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:33:09,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:09,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 41 conjunts are in the unsatisfiable core [2024-06-27 16:33:09,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:10,123 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 16:33:10,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-06-27 16:33:10,172 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:10,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:10,429 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-06-27 16:33:10,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-06-27 16:33:10,449 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:10,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714730581] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:10,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:10,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-06-27 16:33:10,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259112627] [2024-06-27 16:33:10,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:10,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 16:33:10,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:10,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 16:33:10,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2024-06-27 16:33:10,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:10,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 110 transitions, 1003 flow. Second operand has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 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 16:33:10,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:10,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:10,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:10,969 INFO L124 PetriNetUnfolderBase]: 350/638 cut-off events. [2024-06-27 16:33:10,970 INFO L125 PetriNetUnfolderBase]: For 4559/4559 co-relation queries the response was YES. [2024-06-27 16:33:10,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3369 conditions, 638 events. 350/638 cut-off events. For 4559/4559 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2804 event pairs, 10 based on Foata normal form. 10/648 useless extension candidates. Maximal degree in co-relation 3267. Up to 226 conditions per place. [2024-06-27 16:33:10,974 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 92 selfloop transitions, 65 changer transitions 3/161 dead transitions. [2024-06-27 16:33:10,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 161 transitions, 1735 flow [2024-06-27 16:33:10,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 16:33:10,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 16:33:10,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 130 transitions. [2024-06-27 16:33:10,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34759358288770054 [2024-06-27 16:33:10,975 INFO L175 Difference]: Start difference. First operand has 134 places, 110 transitions, 1003 flow. Second operand 17 states and 130 transitions. [2024-06-27 16:33:10,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 161 transitions, 1735 flow [2024-06-27 16:33:10,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 161 transitions, 1686 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 16:33:10,987 INFO L231 Difference]: Finished difference. Result has 149 places, 123 transitions, 1326 flow [2024-06-27 16:33:10,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=960, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1326, PETRI_PLACES=149, PETRI_TRANSITIONS=123} [2024-06-27 16:33:10,988 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 127 predicate places. [2024-06-27 16:33:10,988 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 123 transitions, 1326 flow [2024-06-27 16:33:10,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 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 16:33:10,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:10,988 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:11,000 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 16:33:11,200 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,SelfDestructingSolverStorable35 [2024-06-27 16:33:11,200 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 16:33:11,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:11,200 INFO L85 PathProgramCache]: Analyzing trace with hash 601246533, now seen corresponding path program 28 times [2024-06-27 16:33:11,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:11,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966269281] [2024-06-27 16:33:11,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:11,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:11,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:11,647 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:11,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:11,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966269281] [2024-06-27 16:33:11,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966269281] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:11,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119664105] [2024-06-27 16:33:11,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:33:11,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:11,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:11,668 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 16:33:11,684 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 16:33:11,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:33:11,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:11,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 16:33:11,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:11,912 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:33:11,912 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 65 treesize of output 45 [2024-06-27 16:33:11,946 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:11,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:12,069 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-06-27 16:33:12,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-06-27 16:33:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:12,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119664105] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:12,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:12,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-06-27 16:33:12,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275406505] [2024-06-27 16:33:12,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:12,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 16:33:12,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:12,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 16:33:12,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2024-06-27 16:33:12,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:12,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 123 transitions, 1326 flow. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 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 16:33:12,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:12,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:12,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:12,523 INFO L124 PetriNetUnfolderBase]: 359/660 cut-off events. [2024-06-27 16:33:12,524 INFO L125 PetriNetUnfolderBase]: For 6499/6499 co-relation queries the response was YES. [2024-06-27 16:33:12,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3895 conditions, 660 events. 359/660 cut-off events. For 6499/6499 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 2928 event pairs, 70 based on Foata normal form. 5/665 useless extension candidates. Maximal degree in co-relation 3786. Up to 322 conditions per place. [2024-06-27 16:33:12,528 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 96 selfloop transitions, 47 changer transitions 1/145 dead transitions. [2024-06-27 16:33:12,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 145 transitions, 1765 flow [2024-06-27 16:33:12,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:33:12,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:33:12,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 79 transitions. [2024-06-27 16:33:12,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398989898989899 [2024-06-27 16:33:12,541 INFO L175 Difference]: Start difference. First operand has 149 places, 123 transitions, 1326 flow. Second operand 9 states and 79 transitions. [2024-06-27 16:33:12,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 145 transitions, 1765 flow [2024-06-27 16:33:12,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 145 transitions, 1526 flow, removed 60 selfloop flow, removed 12 redundant places. [2024-06-27 16:33:12,556 INFO L231 Difference]: Finished difference. Result has 146 places, 124 transitions, 1213 flow [2024-06-27 16:33:12,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1088, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1213, PETRI_PLACES=146, PETRI_TRANSITIONS=124} [2024-06-27 16:33:12,557 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 124 predicate places. [2024-06-27 16:33:12,557 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 124 transitions, 1213 flow [2024-06-27 16:33:12,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 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 16:33:12,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:12,557 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:12,569 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 16:33:12,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:12,769 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 16:33:12,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:12,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1123615104, now seen corresponding path program 29 times [2024-06-27 16:33:12,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:12,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50734430] [2024-06-27 16:33:12,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:12,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:13,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:13,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50734430] [2024-06-27 16:33:13,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50734430] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:13,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954347691] [2024-06-27 16:33:13,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:33:13,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:13,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:13,143 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 16:33:13,145 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 16:33:13,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:33:13,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:13,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:33:13,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:13,459 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:33:13,460 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 65 treesize of output 45 [2024-06-27 16:33:13,485 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:13,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:13,577 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:33:13,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-06-27 16:33:13,645 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:13,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954347691] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:13,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:13,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-06-27 16:33:13,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175598495] [2024-06-27 16:33:13,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:13,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 16:33:13,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:13,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 16:33:13,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2024-06-27 16:33:13,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:13,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 124 transitions, 1213 flow. Second operand has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 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 16:33:13,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:13,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:13,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:13,933 INFO L124 PetriNetUnfolderBase]: 365/670 cut-off events. [2024-06-27 16:33:13,933 INFO L125 PetriNetUnfolderBase]: For 5733/5733 co-relation queries the response was YES. [2024-06-27 16:33:13,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3763 conditions, 670 events. 365/670 cut-off events. For 5733/5733 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 2986 event pairs, 130 based on Foata normal form. 4/674 useless extension candidates. Maximal degree in co-relation 3658. Up to 576 conditions per place. [2024-06-27 16:33:13,937 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 111 selfloop transitions, 23 changer transitions 0/135 dead transitions. [2024-06-27 16:33:13,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 135 transitions, 1550 flow [2024-06-27 16:33:13,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:33:13,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:33:13,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 65 transitions. [2024-06-27 16:33:13,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3282828282828283 [2024-06-27 16:33:13,938 INFO L175 Difference]: Start difference. First operand has 146 places, 124 transitions, 1213 flow. Second operand 9 states and 65 transitions. [2024-06-27 16:33:13,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 135 transitions, 1550 flow [2024-06-27 16:33:13,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 135 transitions, 1471 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 16:33:13,953 INFO L231 Difference]: Finished difference. Result has 149 places, 125 transitions, 1206 flow [2024-06-27 16:33:13,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1206, PETRI_PLACES=149, PETRI_TRANSITIONS=125} [2024-06-27 16:33:13,953 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 127 predicate places. [2024-06-27 16:33:13,953 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 125 transitions, 1206 flow [2024-06-27 16:33:13,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 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 16:33:13,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:13,954 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:13,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-06-27 16:33:14,160 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,SelfDestructingSolverStorable37 [2024-06-27 16:33:14,160 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 16:33:14,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:14,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1712242296, now seen corresponding path program 30 times [2024-06-27 16:33:14,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:14,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219762421] [2024-06-27 16:33:14,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:14,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:14,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:14,622 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:14,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:14,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219762421] [2024-06-27 16:33:14,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219762421] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:14,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177544349] [2024-06-27 16:33:14,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:33:14,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:14,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:14,624 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 16:33:14,625 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 16:33:14,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 16:33:14,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:14,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 16:33:14,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:14,903 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:33:14,903 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 46 treesize of output 30 [2024-06-27 16:33:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:14,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:15,026 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-06-27 16:33:15,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-06-27 16:33:15,039 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:15,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177544349] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:15,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:15,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-06-27 16:33:15,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780471935] [2024-06-27 16:33:15,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:15,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 16:33:15,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:15,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 16:33:15,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-06-27 16:33:15,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:15,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 125 transitions, 1206 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:33:15,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:15,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:15,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:15,328 INFO L124 PetriNetUnfolderBase]: 373/691 cut-off events. [2024-06-27 16:33:15,329 INFO L125 PetriNetUnfolderBase]: For 5725/5725 co-relation queries the response was YES. [2024-06-27 16:33:15,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3843 conditions, 691 events. 373/691 cut-off events. For 5725/5725 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3136 event pairs, 26 based on Foata normal form. 6/697 useless extension candidates. Maximal degree in co-relation 3737. Up to 236 conditions per place. [2024-06-27 16:33:15,333 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 96 selfloop transitions, 57 changer transitions 6/160 dead transitions. [2024-06-27 16:33:15,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 160 transitions, 1801 flow [2024-06-27 16:33:15,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 16:33:15,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 16:33:15,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 110 transitions. [2024-06-27 16:33:15,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-27 16:33:15,337 INFO L175 Difference]: Start difference. First operand has 149 places, 125 transitions, 1206 flow. Second operand 14 states and 110 transitions. [2024-06-27 16:33:15,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 160 transitions, 1801 flow [2024-06-27 16:33:15,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 160 transitions, 1741 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 16:33:15,352 INFO L231 Difference]: Finished difference. Result has 158 places, 127 transitions, 1338 flow [2024-06-27 16:33:15,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1338, PETRI_PLACES=158, PETRI_TRANSITIONS=127} [2024-06-27 16:33:15,353 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 136 predicate places. [2024-06-27 16:33:15,353 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 127 transitions, 1338 flow [2024-06-27 16:33:15,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:33:15,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:15,354 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:15,367 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 16:33:15,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-06-27 16:33:15,560 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 16:33:15,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:15,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1624769889, now seen corresponding path program 31 times [2024-06-27 16:33:15,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:15,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965939892] [2024-06-27 16:33:15,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:15,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:15,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:15,911 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:15,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:15,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965939892] [2024-06-27 16:33:15,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965939892] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:15,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398568424] [2024-06-27 16:33:15,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:33:15,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:15,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:15,929 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 16:33:15,944 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 16:33:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:16,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 21 conjunts are in the unsatisfiable core [2024-06-27 16:33:16,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:16,173 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:16,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:16,263 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-06-27 16:33:16,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-06-27 16:33:16,282 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:16,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398568424] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:16,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:16,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-06-27 16:33:16,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25471686] [2024-06-27 16:33:16,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:16,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 16:33:16,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:16,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 16:33:16,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-06-27 16:33:16,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:16,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 127 transitions, 1338 flow. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 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 16:33:16,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:16,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:16,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:16,592 INFO L124 PetriNetUnfolderBase]: 367/678 cut-off events. [2024-06-27 16:33:16,592 INFO L125 PetriNetUnfolderBase]: For 5967/5967 co-relation queries the response was YES. [2024-06-27 16:33:16,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3911 conditions, 678 events. 367/678 cut-off events. For 5967/5967 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3065 event pairs, 74 based on Foata normal form. 2/680 useless extension candidates. Maximal degree in co-relation 3801. Up to 352 conditions per place. [2024-06-27 16:33:16,596 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 94 selfloop transitions, 45 changer transitions 5/145 dead transitions. [2024-06-27 16:33:16,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 145 transitions, 1727 flow [2024-06-27 16:33:16,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:33:16,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:33:16,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 69 transitions. [2024-06-27 16:33:16,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3484848484848485 [2024-06-27 16:33:16,617 INFO L175 Difference]: Start difference. First operand has 158 places, 127 transitions, 1338 flow. Second operand 9 states and 69 transitions. [2024-06-27 16:33:16,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 145 transitions, 1727 flow [2024-06-27 16:33:16,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 145 transitions, 1597 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-27 16:33:16,639 INFO L231 Difference]: Finished difference. Result has 158 places, 126 transitions, 1291 flow [2024-06-27 16:33:16,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1291, PETRI_PLACES=158, PETRI_TRANSITIONS=126} [2024-06-27 16:33:16,641 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 136 predicate places. [2024-06-27 16:33:16,641 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 126 transitions, 1291 flow [2024-06-27 16:33:16,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 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 16:33:16,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:16,642 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:16,669 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 16:33:16,854 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,SelfDestructingSolverStorable39 [2024-06-27 16:33:16,855 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 16:33:16,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:16,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1263995268, now seen corresponding path program 32 times [2024-06-27 16:33:16,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:16,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413161205] [2024-06-27 16:33:16,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:16,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:16,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:17,162 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:17,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:17,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413161205] [2024-06-27 16:33:17,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413161205] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:17,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148760885] [2024-06-27 16:33:17,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:33:17,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:17,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:17,166 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 16:33:17,167 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 16:33:17,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:33:17,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:17,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 16:33:17,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:17,426 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 16:33:17,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-06-27 16:33:17,429 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:17,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:17,525 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:33:17,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-06-27 16:33:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:17,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148760885] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:17,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:17,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2024-06-27 16:33:17,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884546782] [2024-06-27 16:33:17,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:17,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 16:33:17,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:17,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 16:33:17,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-06-27 16:33:17,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:17,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 126 transitions, 1291 flow. Second operand has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 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 16:33:17,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:17,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:17,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:17,770 INFO L124 PetriNetUnfolderBase]: 371/682 cut-off events. [2024-06-27 16:33:17,770 INFO L125 PetriNetUnfolderBase]: For 5722/5722 co-relation queries the response was YES. [2024-06-27 16:33:17,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3950 conditions, 682 events. 371/682 cut-off events. For 5722/5722 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3064 event pairs, 127 based on Foata normal form. 4/686 useless extension candidates. Maximal degree in co-relation 3843. Up to 574 conditions per place. [2024-06-27 16:33:17,774 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 114 selfloop transitions, 24 changer transitions 0/139 dead transitions. [2024-06-27 16:33:17,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 139 transitions, 1664 flow [2024-06-27 16:33:17,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:33:17,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:33:17,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 67 transitions. [2024-06-27 16:33:17,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3383838383838384 [2024-06-27 16:33:17,775 INFO L175 Difference]: Start difference. First operand has 158 places, 126 transitions, 1291 flow. Second operand 9 states and 67 transitions. [2024-06-27 16:33:17,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 139 transitions, 1664 flow [2024-06-27 16:33:17,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 139 transitions, 1567 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 16:33:17,791 INFO L231 Difference]: Finished difference. Result has 157 places, 127 transitions, 1272 flow [2024-06-27 16:33:17,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1196, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1272, PETRI_PLACES=157, PETRI_TRANSITIONS=127} [2024-06-27 16:33:17,791 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 135 predicate places. [2024-06-27 16:33:17,792 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 127 transitions, 1272 flow [2024-06-27 16:33:17,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 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 16:33:17,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:17,792 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:17,803 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 16:33:17,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:17,996 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 16:33:17,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:17,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1110492390, now seen corresponding path program 33 times [2024-06-27 16:33:17,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:17,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734617093] [2024-06-27 16:33:17,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:17,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:18,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:18,498 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:18,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:18,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734617093] [2024-06-27 16:33:18,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734617093] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:18,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234289999] [2024-06-27 16:33:18,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:33:18,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:18,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:18,500 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 16:33:18,501 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 16:33:18,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:33:18,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:18,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 16:33:18,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:18,766 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:33:18,766 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 65 treesize of output 41 [2024-06-27 16:33:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:18,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:18,902 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:33:18,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-06-27 16:33:18,935 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:18,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234289999] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:18,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:18,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-06-27 16:33:18,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390755777] [2024-06-27 16:33:18,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:18,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 16:33:18,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:18,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 16:33:18,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-06-27 16:33:18,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:18,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 127 transitions, 1272 flow. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 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 16:33:18,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:18,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:18,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:19,330 INFO L124 PetriNetUnfolderBase]: 373/688 cut-off events. [2024-06-27 16:33:19,331 INFO L125 PetriNetUnfolderBase]: For 5304/5304 co-relation queries the response was YES. [2024-06-27 16:33:19,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3892 conditions, 688 events. 373/688 cut-off events. For 5304/5304 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3119 event pairs, 111 based on Foata normal form. 4/692 useless extension candidates. Maximal degree in co-relation 3783. Up to 525 conditions per place. [2024-06-27 16:33:19,350 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 117 selfloop transitions, 33 changer transitions 3/154 dead transitions. [2024-06-27 16:33:19,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 154 transitions, 1755 flow [2024-06-27 16:33:19,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 16:33:19,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 16:33:19,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 99 transitions. [2024-06-27 16:33:19,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34615384615384615 [2024-06-27 16:33:19,351 INFO L175 Difference]: Start difference. First operand has 157 places, 127 transitions, 1272 flow. Second operand 13 states and 99 transitions. [2024-06-27 16:33:19,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 154 transitions, 1755 flow [2024-06-27 16:33:19,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 154 transitions, 1656 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 16:33:19,382 INFO L231 Difference]: Finished difference. Result has 163 places, 128 transitions, 1251 flow [2024-06-27 16:33:19,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1192, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1251, PETRI_PLACES=163, PETRI_TRANSITIONS=128} [2024-06-27 16:33:19,383 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 141 predicate places. [2024-06-27 16:33:19,384 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 128 transitions, 1251 flow [2024-06-27 16:33:19,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 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 16:33:19,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:19,400 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:19,433 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 16:33:19,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:19,601 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 16:33:19,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:19,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1053315083, now seen corresponding path program 34 times [2024-06-27 16:33:19,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:19,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923877484] [2024-06-27 16:33:19,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:19,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:19,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:19,997 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:19,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:19,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923877484] [2024-06-27 16:33:19,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923877484] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:19,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205839911] [2024-06-27 16:33:19,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:33:19,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:19,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:19,999 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 16:33:20,000 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 16:33:20,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:33:20,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:20,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 16:33:20,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:20,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:20,393 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-06-27 16:33:20,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-06-27 16:33:20,410 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:20,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205839911] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:20,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:20,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-06-27 16:33:20,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587097583] [2024-06-27 16:33:20,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:20,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 16:33:20,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:20,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 16:33:20,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-06-27 16:33:20,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:20,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 128 transitions, 1251 flow. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 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 16:33:20,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:20,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:20,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:20,761 INFO L124 PetriNetUnfolderBase]: 368/678 cut-off events. [2024-06-27 16:33:20,762 INFO L125 PetriNetUnfolderBase]: For 4099/4099 co-relation queries the response was YES. [2024-06-27 16:33:20,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3774 conditions, 678 events. 368/678 cut-off events. For 4099/4099 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3050 event pairs, 77 based on Foata normal form. 2/680 useless extension candidates. Maximal degree in co-relation 3664. Up to 360 conditions per place. [2024-06-27 16:33:20,767 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 93 selfloop transitions, 42 changer transitions 4/140 dead transitions. [2024-06-27 16:33:20,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 140 transitions, 1575 flow [2024-06-27 16:33:20,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:33:20,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:33:20,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 68 transitions. [2024-06-27 16:33:20,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3434343434343434 [2024-06-27 16:33:20,784 INFO L175 Difference]: Start difference. First operand has 163 places, 128 transitions, 1251 flow. Second operand 9 states and 68 transitions. [2024-06-27 16:33:20,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 140 transitions, 1575 flow [2024-06-27 16:33:20,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 140 transitions, 1447 flow, removed 15 selfloop flow, removed 19 redundant places. [2024-06-27 16:33:20,800 INFO L231 Difference]: Finished difference. Result has 152 places, 125 transitions, 1181 flow [2024-06-27 16:33:20,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1181, PETRI_PLACES=152, PETRI_TRANSITIONS=125} [2024-06-27 16:33:20,801 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 130 predicate places. [2024-06-27 16:33:20,801 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 125 transitions, 1181 flow [2024-06-27 16:33:20,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 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 16:33:20,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:20,802 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:20,816 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 16:33:21,014 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,SelfDestructingSolverStorable42 [2024-06-27 16:33:21,014 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 16:33:21,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:21,015 INFO L85 PathProgramCache]: Analyzing trace with hash -952561480, now seen corresponding path program 35 times [2024-06-27 16:33:21,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:21,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982968260] [2024-06-27 16:33:21,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:21,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:21,355 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:21,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:21,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982968260] [2024-06-27 16:33:21,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982968260] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:21,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924869411] [2024-06-27 16:33:21,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:33:21,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:21,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:21,357 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 16:33:21,358 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 16:33:21,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:33:21,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:21,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:33:21,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:21,689 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:33:21,689 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 65 treesize of output 45 [2024-06-27 16:33:21,721 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:21,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:21,829 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-06-27 16:33:21,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-06-27 16:33:21,845 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:21,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924869411] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:21,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:21,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-06-27 16:33:21,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57090827] [2024-06-27 16:33:21,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:21,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 16:33:21,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:21,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 16:33:21,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2024-06-27 16:33:21,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:21,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 125 transitions, 1181 flow. Second operand has 21 states, 21 states have (on average 5.333333333333333) internal successors, (112), 21 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 16:33:21,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:21,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:21,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:22,324 INFO L124 PetriNetUnfolderBase]: 378/692 cut-off events. [2024-06-27 16:33:22,325 INFO L125 PetriNetUnfolderBase]: For 4214/4214 co-relation queries the response was YES. [2024-06-27 16:33:22,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3780 conditions, 692 events. 378/692 cut-off events. For 4214/4214 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3114 event pairs, 20 based on Foata normal form. 4/696 useless extension candidates. Maximal degree in co-relation 3680. Up to 260 conditions per place. [2024-06-27 16:33:22,329 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 98 selfloop transitions, 58 changer transitions 0/157 dead transitions. [2024-06-27 16:33:22,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 157 transitions, 1684 flow [2024-06-27 16:33:22,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 16:33:22,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 16:33:22,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 107 transitions. [2024-06-27 16:33:22,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3474025974025974 [2024-06-27 16:33:22,349 INFO L175 Difference]: Start difference. First operand has 152 places, 125 transitions, 1181 flow. Second operand 14 states and 107 transitions. [2024-06-27 16:33:22,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 157 transitions, 1684 flow [2024-06-27 16:33:22,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 157 transitions, 1600 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 16:33:22,362 INFO L231 Difference]: Finished difference. Result has 157 places, 128 transitions, 1260 flow [2024-06-27 16:33:22,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1097, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1260, PETRI_PLACES=157, PETRI_TRANSITIONS=128} [2024-06-27 16:33:22,363 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 135 predicate places. [2024-06-27 16:33:22,363 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 128 transitions, 1260 flow [2024-06-27 16:33:22,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.333333333333333) internal successors, (112), 21 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 16:33:22,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:22,363 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:22,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-06-27 16:33:22,576 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,SelfDestructingSolverStorable43 [2024-06-27 16:33:22,576 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 16:33:22,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:22,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1468901763, now seen corresponding path program 36 times [2024-06-27 16:33:22,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:22,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001385693] [2024-06-27 16:33:22,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:22,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:22,943 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:22,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:22,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001385693] [2024-06-27 16:33:22,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001385693] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:22,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896347809] [2024-06-27 16:33:22,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:33:22,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:22,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:22,945 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 16:33:22,946 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 16:33:23,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 16:33:23,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:23,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 16:33:23,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:23,234 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:33:23,235 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 46 treesize of output 30 [2024-06-27 16:33:23,268 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:23,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:23,374 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:33:23,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-06-27 16:33:23,432 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:23,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896347809] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:23,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:23,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-06-27 16:33:23,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133823821] [2024-06-27 16:33:23,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:23,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 16:33:23,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:23,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 16:33:23,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2024-06-27 16:33:23,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:23,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 128 transitions, 1260 flow. Second operand has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 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 16:33:23,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:23,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:23,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:23,707 INFO L124 PetriNetUnfolderBase]: 387/714 cut-off events. [2024-06-27 16:33:23,707 INFO L125 PetriNetUnfolderBase]: For 5389/5389 co-relation queries the response was YES. [2024-06-27 16:33:23,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4031 conditions, 714 events. 387/714 cut-off events. For 5389/5389 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3270 event pairs, 130 based on Foata normal form. 5/719 useless extension candidates. Maximal degree in co-relation 3929. Up to 575 conditions per place. [2024-06-27 16:33:23,714 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 114 selfloop transitions, 28 changer transitions 1/144 dead transitions. [2024-06-27 16:33:23,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 144 transitions, 1638 flow [2024-06-27 16:33:23,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:33:23,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:33:23,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 73 transitions. [2024-06-27 16:33:23,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3686868686868687 [2024-06-27 16:33:23,715 INFO L175 Difference]: Start difference. First operand has 157 places, 128 transitions, 1260 flow. Second operand 9 states and 73 transitions. [2024-06-27 16:33:23,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 144 transitions, 1638 flow [2024-06-27 16:33:23,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 144 transitions, 1509 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-27 16:33:23,728 INFO L231 Difference]: Finished difference. Result has 155 places, 129 transitions, 1224 flow [2024-06-27 16:33:23,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1133, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1224, PETRI_PLACES=155, PETRI_TRANSITIONS=129} [2024-06-27 16:33:23,729 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 133 predicate places. [2024-06-27 16:33:23,729 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 129 transitions, 1224 flow [2024-06-27 16:33:23,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 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 16:33:23,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:23,729 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:23,743 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 16:33:23,941 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,SelfDestructingSolverStorable44 [2024-06-27 16:33:23,941 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 16:33:23,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:23,942 INFO L85 PathProgramCache]: Analyzing trace with hash -2057078813, now seen corresponding path program 37 times [2024-06-27 16:33:23,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:23,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992552897] [2024-06-27 16:33:23,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:23,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:23,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:24,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:24,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992552897] [2024-06-27 16:33:24,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992552897] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:24,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532938798] [2024-06-27 16:33:24,257 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:33:24,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:24,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:24,258 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 16:33:24,272 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 16:33:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:24,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 21 conjunts are in the unsatisfiable core [2024-06-27 16:33:24,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:24,524 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-06-27 16:33:24,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-06-27 16:33:24,528 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:24,529 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:24,614 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:33:24,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-06-27 16:33:24,636 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:24,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532938798] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:24,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:24,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-06-27 16:33:24,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466132221] [2024-06-27 16:33:24,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:24,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 16:33:24,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:24,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 16:33:24,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-06-27 16:33:24,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:24,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 129 transitions, 1224 flow. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 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 16:33:24,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:24,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:24,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:24,856 INFO L124 PetriNetUnfolderBase]: 394/726 cut-off events. [2024-06-27 16:33:24,856 INFO L125 PetriNetUnfolderBase]: For 5385/5385 co-relation queries the response was YES. [2024-06-27 16:33:24,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4011 conditions, 726 events. 394/726 cut-off events. For 5385/5385 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3336 event pairs, 143 based on Foata normal form. 5/731 useless extension candidates. Maximal degree in co-relation 3909. Up to 629 conditions per place. [2024-06-27 16:33:24,861 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 122 selfloop transitions, 21 changer transitions 0/144 dead transitions. [2024-06-27 16:33:24,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 144 transitions, 1606 flow [2024-06-27 16:33:24,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:33:24,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:33:24,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 68 transitions. [2024-06-27 16:33:24,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3434343434343434 [2024-06-27 16:33:24,862 INFO L175 Difference]: Start difference. First operand has 155 places, 129 transitions, 1224 flow. Second operand 9 states and 68 transitions. [2024-06-27 16:33:24,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 144 transitions, 1606 flow [2024-06-27 16:33:24,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 144 transitions, 1530 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 16:33:24,877 INFO L231 Difference]: Finished difference. Result has 157 places, 130 transitions, 1225 flow [2024-06-27 16:33:24,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1148, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1225, PETRI_PLACES=157, PETRI_TRANSITIONS=130} [2024-06-27 16:33:24,878 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 135 predicate places. [2024-06-27 16:33:24,878 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 130 transitions, 1225 flow [2024-06-27 16:33:24,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 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 16:33:24,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:24,878 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:24,890 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 16:33:25,090 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,SelfDestructingSolverStorable45 [2024-06-27 16:33:25,090 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 16:33:25,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:25,090 INFO L85 PathProgramCache]: Analyzing trace with hash -179574403, now seen corresponding path program 38 times [2024-06-27 16:33:25,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:25,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073592277] [2024-06-27 16:33:25,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:25,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:25,485 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:25,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:25,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073592277] [2024-06-27 16:33:25,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073592277] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:25,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649032734] [2024-06-27 16:33:25,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:33:25,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:25,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:25,487 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 16:33:25,488 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 16:33:25,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:33:25,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:25,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 16:33:25,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:25,769 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:33:25,770 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 65 treesize of output 41 [2024-06-27 16:33:25,796 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:25,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:25,923 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-06-27 16:33:25,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-06-27 16:33:25,955 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:25,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649032734] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:25,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:25,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-06-27 16:33:25,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562035131] [2024-06-27 16:33:25,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:25,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 16:33:25,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:25,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 16:33:25,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-06-27 16:33:25,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:25,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 130 transitions, 1225 flow. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 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 16:33:25,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:25,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:25,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:26,429 INFO L124 PetriNetUnfolderBase]: 390/714 cut-off events. [2024-06-27 16:33:26,429 INFO L125 PetriNetUnfolderBase]: For 4583/4583 co-relation queries the response was YES. [2024-06-27 16:33:26,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3888 conditions, 714 events. 390/714 cut-off events. For 4583/4583 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3268 event pairs, 85 based on Foata normal form. 2/716 useless extension candidates. Maximal degree in co-relation 3785. Up to 390 conditions per place. [2024-06-27 16:33:26,433 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 98 selfloop transitions, 45 changer transitions 2/146 dead transitions. [2024-06-27 16:33:26,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 146 transitions, 1583 flow [2024-06-27 16:33:26,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 16:33:26,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 16:33:26,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 77 transitions. [2024-06-27 16:33:26,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35 [2024-06-27 16:33:26,434 INFO L175 Difference]: Start difference. First operand has 157 places, 130 transitions, 1225 flow. Second operand 10 states and 77 transitions. [2024-06-27 16:33:26,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 146 transitions, 1583 flow [2024-06-27 16:33:26,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 146 transitions, 1497 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-27 16:33:26,448 INFO L231 Difference]: Finished difference. Result has 157 places, 128 transitions, 1212 flow [2024-06-27 16:33:26,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1129, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1212, PETRI_PLACES=157, PETRI_TRANSITIONS=128} [2024-06-27 16:33:26,449 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 135 predicate places. [2024-06-27 16:33:26,449 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 128 transitions, 1212 flow [2024-06-27 16:33:26,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 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 16:33:26,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:26,449 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:26,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-06-27 16:33:26,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:26,662 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 16:33:26,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:26,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1092855677, now seen corresponding path program 39 times [2024-06-27 16:33:26,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:26,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478695457] [2024-06-27 16:33:26,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:26,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:26,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:27,006 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:27,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:27,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478695457] [2024-06-27 16:33:27,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478695457] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:27,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035068016] [2024-06-27 16:33:27,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:33:27,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:27,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:27,008 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:33:27,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-06-27 16:33:27,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:33:27,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:27,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 16:33:27,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:27,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:27,374 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:33:27,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-06-27 16:33:27,441 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:27,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035068016] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:27,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:27,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-06-27 16:33:27,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277843272] [2024-06-27 16:33:27,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:27,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 16:33:27,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:27,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 16:33:27,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-06-27 16:33:27,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:27,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 128 transitions, 1212 flow. Second operand has 17 states, 17 states have (on average 5.235294117647059) internal successors, (89), 17 states have internal predecessors, (89), 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 16:33:27,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:27,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:27,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:27,715 INFO L124 PetriNetUnfolderBase]: 387/709 cut-off events. [2024-06-27 16:33:27,716 INFO L125 PetriNetUnfolderBase]: For 4354/4354 co-relation queries the response was YES. [2024-06-27 16:33:27,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3877 conditions, 709 events. 387/709 cut-off events. For 4354/4354 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3230 event pairs, 138 based on Foata normal form. 2/711 useless extension candidates. Maximal degree in co-relation 3775. Up to 611 conditions per place. [2024-06-27 16:33:27,720 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 109 selfloop transitions, 21 changer transitions 7/138 dead transitions. [2024-06-27 16:33:27,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 138 transitions, 1518 flow [2024-06-27 16:33:27,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:33:27,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:33:27,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 65 transitions. [2024-06-27 16:33:27,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3282828282828283 [2024-06-27 16:33:27,721 INFO L175 Difference]: Start difference. First operand has 157 places, 128 transitions, 1212 flow. Second operand 9 states and 65 transitions. [2024-06-27 16:33:27,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 138 transitions, 1518 flow [2024-06-27 16:33:27,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 138 transitions, 1428 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 16:33:27,733 INFO L231 Difference]: Finished difference. Result has 155 places, 125 transitions, 1131 flow [2024-06-27 16:33:27,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1131, PETRI_PLACES=155, PETRI_TRANSITIONS=125} [2024-06-27 16:33:27,733 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 133 predicate places. [2024-06-27 16:33:27,734 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 125 transitions, 1131 flow [2024-06-27 16:33:27,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.235294117647059) internal successors, (89), 17 states have internal predecessors, (89), 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 16:33:27,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:27,734 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:27,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-06-27 16:33:27,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-06-27 16:33:27,945 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 16:33:27,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:27,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1966596357, now seen corresponding path program 40 times [2024-06-27 16:33:27,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:27,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587398059] [2024-06-27 16:33:27,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:27,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:28,307 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:28,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:28,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587398059] [2024-06-27 16:33:28,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587398059] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:28,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815543474] [2024-06-27 16:33:28,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:33:28,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:28,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:28,309 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:33:28,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-06-27 16:33:28,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:33:28,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:28,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 16:33:28,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:28,591 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:33:28,591 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 65 treesize of output 45 [2024-06-27 16:33:28,619 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:28,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:28,721 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:33:28,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-06-27 16:33:28,773 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:28,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815543474] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:28,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:28,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-06-27 16:33:28,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794221503] [2024-06-27 16:33:28,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:28,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 16:33:28,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:28,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 16:33:28,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2024-06-27 16:33:28,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:28,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 125 transitions, 1131 flow. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 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 16:33:28,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:28,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:28,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:29,156 INFO L124 PetriNetUnfolderBase]: 380/686 cut-off events. [2024-06-27 16:33:29,157 INFO L125 PetriNetUnfolderBase]: For 4039/4039 co-relation queries the response was YES. [2024-06-27 16:33:29,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3684 conditions, 686 events. 380/686 cut-off events. For 4039/4039 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3033 event pairs, 126 based on Foata normal form. 2/688 useless extension candidates. Maximal degree in co-relation 3612. Up to 573 conditions per place. [2024-06-27 16:33:29,160 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 109 selfloop transitions, 25 changer transitions 5/140 dead transitions. [2024-06-27 16:33:29,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 140 transitions, 1464 flow [2024-06-27 16:33:29,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 16:33:29,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 16:33:29,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 76 transitions. [2024-06-27 16:33:29,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34545454545454546 [2024-06-27 16:33:29,161 INFO L175 Difference]: Start difference. First operand has 155 places, 125 transitions, 1131 flow. Second operand 10 states and 76 transitions. [2024-06-27 16:33:29,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 140 transitions, 1464 flow [2024-06-27 16:33:29,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 140 transitions, 1420 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 16:33:29,172 INFO L231 Difference]: Finished difference. Result has 153 places, 123 transitions, 1117 flow [2024-06-27 16:33:29,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1117, PETRI_PLACES=153, PETRI_TRANSITIONS=123} [2024-06-27 16:33:29,172 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 131 predicate places. [2024-06-27 16:33:29,172 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 123 transitions, 1117 flow [2024-06-27 16:33:29,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 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 16:33:29,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:29,173 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:29,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-06-27 16:33:29,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-06-27 16:33:29,384 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 16:33:29,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:29,384 INFO L85 PathProgramCache]: Analyzing trace with hash -562267998, now seen corresponding path program 41 times [2024-06-27 16:33:29,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:29,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521327761] [2024-06-27 16:33:29,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:29,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:29,684 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:29,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:29,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521327761] [2024-06-27 16:33:29,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521327761] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:29,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875185033] [2024-06-27 16:33:29,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:33:29,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:29,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:29,686 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:33:29,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-06-27 16:33:29,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:33:29,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:30,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 16:33:30,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:30,100 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-06-27 16:33:30,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-06-27 16:33:30,103 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:30,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:30,204 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-06-27 16:33:30,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-06-27 16:33:30,221 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:30,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875185033] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:30,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:30,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 20 [2024-06-27 16:33:30,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291262092] [2024-06-27 16:33:30,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:30,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 16:33:30,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:30,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 16:33:30,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2024-06-27 16:33:30,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:30,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 123 transitions, 1117 flow. Second operand has 20 states, 20 states have (on average 5.4) internal successors, (108), 20 states have internal predecessors, (108), 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 16:33:30,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:30,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:30,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:30,542 INFO L124 PetriNetUnfolderBase]: 394/701 cut-off events. [2024-06-27 16:33:30,547 INFO L125 PetriNetUnfolderBase]: For 4025/4025 co-relation queries the response was YES. [2024-06-27 16:33:30,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3814 conditions, 701 events. 394/701 cut-off events. For 4025/4025 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3080 event pairs, 19 based on Foata normal form. 4/705 useless extension candidates. Maximal degree in co-relation 3744. Up to 331 conditions per place. [2024-06-27 16:33:30,551 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 96 selfloop transitions, 50 changer transitions 0/147 dead transitions. [2024-06-27 16:33:30,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 147 transitions, 1565 flow [2024-06-27 16:33:30,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 16:33:30,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 16:33:30,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 78 transitions. [2024-06-27 16:33:30,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35454545454545455 [2024-06-27 16:33:30,552 INFO L175 Difference]: Start difference. First operand has 153 places, 123 transitions, 1117 flow. Second operand 10 states and 78 transitions. [2024-06-27 16:33:30,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 147 transitions, 1565 flow [2024-06-27 16:33:30,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 147 transitions, 1490 flow, removed 5 selfloop flow, removed 13 redundant places. [2024-06-27 16:33:30,567 INFO L231 Difference]: Finished difference. Result has 148 places, 126 transitions, 1190 flow [2024-06-27 16:33:30,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1036, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1190, PETRI_PLACES=148, PETRI_TRANSITIONS=126} [2024-06-27 16:33:30,587 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 126 predicate places. [2024-06-27 16:33:30,587 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 126 transitions, 1190 flow [2024-06-27 16:33:30,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.4) internal successors, (108), 20 states have internal predecessors, (108), 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 16:33:30,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:30,587 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:30,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-06-27 16:33:30,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-06-27 16:33:30,788 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 16:33:30,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:30,788 INFO L85 PathProgramCache]: Analyzing trace with hash 591958039, now seen corresponding path program 42 times [2024-06-27 16:33:30,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:30,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021414354] [2024-06-27 16:33:30,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:30,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:30,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:31,147 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:31,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:31,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021414354] [2024-06-27 16:33:31,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021414354] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:31,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981217185] [2024-06-27 16:33:31,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:33:31,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:31,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:31,149 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:33:31,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-06-27 16:33:31,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 16:33:31,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:31,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 16:33:31,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:31,440 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:33:31,440 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 65 treesize of output 41 [2024-06-27 16:33:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:31,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:31,574 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:33:31,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-06-27 16:33:31,623 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:31,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981217185] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:31,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:31,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-06-27 16:33:31,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983315304] [2024-06-27 16:33:31,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:31,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 16:33:31,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:31,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 16:33:31,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-06-27 16:33:31,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:31,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 126 transitions, 1190 flow. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 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 16:33:31,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:31,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:31,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:31,852 INFO L124 PetriNetUnfolderBase]: 392/688 cut-off events. [2024-06-27 16:33:31,852 INFO L125 PetriNetUnfolderBase]: For 4254/4254 co-relation queries the response was YES. [2024-06-27 16:33:31,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3802 conditions, 688 events. 392/688 cut-off events. For 4254/4254 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3000 event pairs, 125 based on Foata normal form. 5/693 useless extension candidates. Maximal degree in co-relation 3702. Up to 577 conditions per place. [2024-06-27 16:33:31,857 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 118 selfloop transitions, 26 changer transitions 1/146 dead transitions. [2024-06-27 16:33:31,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 146 transitions, 1604 flow [2024-06-27 16:33:31,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 16:33:31,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 16:33:31,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 82 transitions. [2024-06-27 16:33:31,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33884297520661155 [2024-06-27 16:33:31,858 INFO L175 Difference]: Start difference. First operand has 148 places, 126 transitions, 1190 flow. Second operand 11 states and 82 transitions. [2024-06-27 16:33:31,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 146 transitions, 1604 flow [2024-06-27 16:33:31,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 146 transitions, 1499 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 16:33:31,869 INFO L231 Difference]: Finished difference. Result has 153 places, 127 transitions, 1167 flow [2024-06-27 16:33:31,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1091, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1167, PETRI_PLACES=153, PETRI_TRANSITIONS=127} [2024-06-27 16:33:31,870 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 131 predicate places. [2024-06-27 16:33:31,870 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 127 transitions, 1167 flow [2024-06-27 16:33:31,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 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 16:33:31,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:31,870 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:31,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2024-06-27 16:33:32,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:32,082 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:33:32,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:32,082 INFO L85 PathProgramCache]: Analyzing trace with hash -436554240, now seen corresponding path program 43 times [2024-06-27 16:33:32,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:32,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932206021] [2024-06-27 16:33:32,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:32,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:32,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:32,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932206021] [2024-06-27 16:33:32,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932206021] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:32,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011374891] [2024-06-27 16:33:32,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:33:32,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:32,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:32,417 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:33:32,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-06-27 16:33:32,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:32,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 21 conjunts are in the unsatisfiable core [2024-06-27 16:33:32,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:32,676 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:33:32,676 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 46 treesize of output 34 [2024-06-27 16:33:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:32,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:32,825 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:33:32,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-06-27 16:33:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:32,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011374891] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:32,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:32,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-06-27 16:33:32,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291586042] [2024-06-27 16:33:32,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:32,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 16:33:32,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:32,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 16:33:32,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-06-27 16:33:32,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:32,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 127 transitions, 1167 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:33:32,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:32,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:32,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:33,156 INFO L124 PetriNetUnfolderBase]: 384/669 cut-off events. [2024-06-27 16:33:33,156 INFO L125 PetriNetUnfolderBase]: For 3204/3204 co-relation queries the response was YES. [2024-06-27 16:33:33,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3620 conditions, 669 events. 384/669 cut-off events. For 3204/3204 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2892 event pairs, 114 based on Foata normal form. 3/672 useless extension candidates. Maximal degree in co-relation 3574. Up to 548 conditions per place. [2024-06-27 16:33:33,160 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 110 selfloop transitions, 27 changer transitions 3/141 dead transitions. [2024-06-27 16:33:33,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 141 transitions, 1519 flow [2024-06-27 16:33:33,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 16:33:33,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 16:33:33,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 78 transitions. [2024-06-27 16:33:33,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32231404958677684 [2024-06-27 16:33:33,161 INFO L175 Difference]: Start difference. First operand has 153 places, 127 transitions, 1167 flow. Second operand 11 states and 78 transitions. [2024-06-27 16:33:33,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 141 transitions, 1519 flow [2024-06-27 16:33:33,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 141 transitions, 1401 flow, removed 14 selfloop flow, removed 12 redundant places. [2024-06-27 16:33:33,171 INFO L231 Difference]: Finished difference. Result has 147 places, 125 transitions, 1089 flow [2024-06-27 16:33:33,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1041, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1089, PETRI_PLACES=147, PETRI_TRANSITIONS=125} [2024-06-27 16:33:33,172 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 125 predicate places. [2024-06-27 16:33:33,172 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 125 transitions, 1089 flow [2024-06-27 16:33:33,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:33:33,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:33,172 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:33,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-06-27 16:33:33,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:33,384 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:33:33,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:33,384 INFO L85 PathProgramCache]: Analyzing trace with hash -653163177, now seen corresponding path program 44 times [2024-06-27 16:33:33,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:33,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52642349] [2024-06-27 16:33:33,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:33,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:34,000 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:33:34,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:34,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52642349] [2024-06-27 16:33:34,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52642349] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:34,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139107611] [2024-06-27 16:33:34,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:33:34,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:34,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:34,001 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:33:34,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-06-27 16:33:34,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:33:34,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:34,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 41 conjunts are in the unsatisfiable core [2024-06-27 16:33:34,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:34,329 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:33:34,330 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 27 treesize of output 19 [2024-06-27 16:33:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:33:34,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:34,693 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-06-27 16:33:34,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 134 treesize of output 83 [2024-06-27 16:33:34,749 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:34,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139107611] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:34,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:34,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 10] total 31 [2024-06-27 16:33:34,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273175837] [2024-06-27 16:33:34,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:34,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-27 16:33:34,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:34,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-27 16:33:34,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2024-06-27 16:33:34,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:34,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 125 transitions, 1089 flow. Second operand has 31 states, 31 states have (on average 4.741935483870968) internal successors, (147), 31 states have internal predecessors, (147), 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 16:33:34,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:34,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:34,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:35,592 INFO L124 PetriNetUnfolderBase]: 520/905 cut-off events. [2024-06-27 16:33:35,593 INFO L125 PetriNetUnfolderBase]: For 3306/3306 co-relation queries the response was YES. [2024-06-27 16:33:35,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4650 conditions, 905 events. 520/905 cut-off events. For 3306/3306 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 4249 event pairs, 37 based on Foata normal form. 1/906 useless extension candidates. Maximal degree in co-relation 4607. Up to 352 conditions per place. [2024-06-27 16:33:35,598 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 107 selfloop transitions, 73 changer transitions 3/184 dead transitions. [2024-06-27 16:33:35,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 184 transitions, 1845 flow [2024-06-27 16:33:35,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-27 16:33:35,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-27 16:33:35,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 141 transitions. [2024-06-27 16:33:35,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32045454545454544 [2024-06-27 16:33:35,599 INFO L175 Difference]: Start difference. First operand has 147 places, 125 transitions, 1089 flow. Second operand 20 states and 141 transitions. [2024-06-27 16:33:35,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 184 transitions, 1845 flow [2024-06-27 16:33:35,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 184 transitions, 1741 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-27 16:33:35,610 INFO L231 Difference]: Finished difference. Result has 158 places, 138 transitions, 1342 flow [2024-06-27 16:33:35,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=995, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1342, PETRI_PLACES=158, PETRI_TRANSITIONS=138} [2024-06-27 16:33:35,611 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 136 predicate places. [2024-06-27 16:33:35,611 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 138 transitions, 1342 flow [2024-06-27 16:33:35,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.741935483870968) internal successors, (147), 31 states have internal predecessors, (147), 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 16:33:35,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:35,611 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:35,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2024-06-27 16:33:35,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:35,816 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:33:35,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:35,817 INFO L85 PathProgramCache]: Analyzing trace with hash 201268159, now seen corresponding path program 45 times [2024-06-27 16:33:35,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:35,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422335262] [2024-06-27 16:33:35,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:35,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:35,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:36,469 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:33:36,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:36,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422335262] [2024-06-27 16:33:36,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422335262] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:36,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96903735] [2024-06-27 16:33:36,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:33:36,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:36,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:36,471 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:33:36,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-06-27 16:33:36,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:33:36,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:36,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:33:36,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:36,789 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:33:36,790 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 27 treesize of output 19 [2024-06-27 16:33:36,813 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:36,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:37,028 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-06-27 16:33:37,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-06-27 16:33:37,110 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:37,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96903735] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:37,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:37,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 32 [2024-06-27 16:33:37,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908231698] [2024-06-27 16:33:37,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:37,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-06-27 16:33:37,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:37,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-06-27 16:33:37,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2024-06-27 16:33:37,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:37,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 138 transitions, 1342 flow. Second operand has 32 states, 32 states have (on average 4.71875) internal successors, (151), 32 states have internal predecessors, (151), 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 16:33:37,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:37,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:37,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:38,019 INFO L124 PetriNetUnfolderBase]: 588/1029 cut-off events. [2024-06-27 16:33:38,019 INFO L125 PetriNetUnfolderBase]: For 4790/4790 co-relation queries the response was YES. [2024-06-27 16:33:38,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5617 conditions, 1029 events. 588/1029 cut-off events. For 4790/4790 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 4958 event pairs, 50 based on Foata normal form. 2/1031 useless extension candidates. Maximal degree in co-relation 5569. Up to 656 conditions per place. [2024-06-27 16:33:38,026 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 109 selfloop transitions, 89 changer transitions 4/203 dead transitions. [2024-06-27 16:33:38,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 203 transitions, 2172 flow [2024-06-27 16:33:38,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 16:33:38,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 16:33:38,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 190 transitions. [2024-06-27 16:33:38,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31986531986531985 [2024-06-27 16:33:38,028 INFO L175 Difference]: Start difference. First operand has 158 places, 138 transitions, 1342 flow. Second operand 27 states and 190 transitions. [2024-06-27 16:33:38,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 203 transitions, 2172 flow [2024-06-27 16:33:38,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 203 transitions, 2004 flow, removed 31 selfloop flow, removed 15 redundant places. [2024-06-27 16:33:38,048 INFO L231 Difference]: Finished difference. Result has 174 places, 160 transitions, 1683 flow [2024-06-27 16:33:38,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1188, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1683, PETRI_PLACES=174, PETRI_TRANSITIONS=160} [2024-06-27 16:33:38,049 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 152 predicate places. [2024-06-27 16:33:38,049 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 160 transitions, 1683 flow [2024-06-27 16:33:38,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.71875) internal successors, (151), 32 states have internal predecessors, (151), 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 16:33:38,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:38,050 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:38,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-06-27 16:33:38,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-06-27 16:33:38,262 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:33:38,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:38,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1060737335, now seen corresponding path program 46 times [2024-06-27 16:33:38,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:38,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137077318] [2024-06-27 16:33:38,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:38,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:38,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:38,885 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:33:38,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:38,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137077318] [2024-06-27 16:33:38,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137077318] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:38,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064406007] [2024-06-27 16:33:38,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:33:38,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:38,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:38,887 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:33:38,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-06-27 16:33:39,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:33:39,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:39,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 16:33:39,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:39,199 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:33:39,199 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 35 treesize of output 23 [2024-06-27 16:33:39,241 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:39,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:39,460 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-06-27 16:33:39,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-06-27 16:33:39,561 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:39,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064406007] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:39,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:39,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 32 [2024-06-27 16:33:39,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156878662] [2024-06-27 16:33:39,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:39,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-06-27 16:33:39,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:39,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-06-27 16:33:39,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2024-06-27 16:33:39,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:39,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 160 transitions, 1683 flow. Second operand has 32 states, 32 states have (on average 4.65625) internal successors, (149), 32 states have internal predecessors, (149), 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 16:33:39,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:39,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:39,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:40,634 INFO L124 PetriNetUnfolderBase]: 592/1045 cut-off events. [2024-06-27 16:33:40,635 INFO L125 PetriNetUnfolderBase]: For 5715/5715 co-relation queries the response was YES. [2024-06-27 16:33:40,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6120 conditions, 1045 events. 592/1045 cut-off events. For 5715/5715 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 5099 event pairs, 56 based on Foata normal form. 2/1047 useless extension candidates. Maximal degree in co-relation 6071. Up to 650 conditions per place. [2024-06-27 16:33:40,641 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 110 selfloop transitions, 89 changer transitions 5/205 dead transitions. [2024-06-27 16:33:40,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 205 transitions, 2297 flow [2024-06-27 16:33:40,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 16:33:40,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-27 16:33:40,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 186 transitions. [2024-06-27 16:33:40,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32517482517482516 [2024-06-27 16:33:40,643 INFO L175 Difference]: Start difference. First operand has 174 places, 160 transitions, 1683 flow. Second operand 26 states and 186 transitions. [2024-06-27 16:33:40,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 205 transitions, 2297 flow [2024-06-27 16:33:40,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 205 transitions, 2050 flow, removed 80 selfloop flow, removed 17 redundant places. [2024-06-27 16:33:40,670 INFO L231 Difference]: Finished difference. Result has 184 places, 162 transitions, 1659 flow [2024-06-27 16:33:40,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1436, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1659, PETRI_PLACES=184, PETRI_TRANSITIONS=162} [2024-06-27 16:33:40,670 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 162 predicate places. [2024-06-27 16:33:40,670 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 162 transitions, 1659 flow [2024-06-27 16:33:40,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.65625) internal successors, (149), 32 states have internal predecessors, (149), 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 16:33:40,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:40,671 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:40,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-06-27 16:33:40,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-06-27 16:33:40,880 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:33:40,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:40,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1509867643, now seen corresponding path program 47 times [2024-06-27 16:33:40,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:40,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506406411] [2024-06-27 16:33:40,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:40,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:40,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:41,516 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:33:41,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:41,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506406411] [2024-06-27 16:33:41,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506406411] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:41,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940603960] [2024-06-27 16:33:41,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:33:41,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:41,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:41,517 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:33:41,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-06-27 16:33:41,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:33:41,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:41,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 35 conjunts are in the unsatisfiable core [2024-06-27 16:33:41,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:41,881 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:33:41,882 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 31 treesize of output 23 [2024-06-27 16:33:41,902 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:41,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:42,143 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-06-27 16:33:42,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-06-27 16:33:42,207 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:42,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940603960] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:42,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:42,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 10] total 36 [2024-06-27 16:33:42,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5364716] [2024-06-27 16:33:42,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:42,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-06-27 16:33:42,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:42,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-06-27 16:33:42,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2024-06-27 16:33:42,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:42,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 162 transitions, 1659 flow. Second operand has 36 states, 36 states have (on average 4.777777777777778) internal successors, (172), 36 states have internal predecessors, (172), 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 16:33:42,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:42,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:42,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:42,990 INFO L124 PetriNetUnfolderBase]: 608/1075 cut-off events. [2024-06-27 16:33:42,990 INFO L125 PetriNetUnfolderBase]: For 5061/5061 co-relation queries the response was YES. [2024-06-27 16:33:42,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6071 conditions, 1075 events. 608/1075 cut-off events. For 5061/5061 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 5304 event pairs, 66 based on Foata normal form. 1/1076 useless extension candidates. Maximal degree in co-relation 6020. Up to 767 conditions per place. [2024-06-27 16:33:43,000 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 113 selfloop transitions, 77 changer transitions 2/193 dead transitions. [2024-06-27 16:33:43,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 193 transitions, 2233 flow [2024-06-27 16:33:43,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 16:33:43,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 16:33:43,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 130 transitions. [2024-06-27 16:33:43,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31100478468899523 [2024-06-27 16:33:43,001 INFO L175 Difference]: Start difference. First operand has 184 places, 162 transitions, 1659 flow. Second operand 19 states and 130 transitions. [2024-06-27 16:33:43,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 193 transitions, 2233 flow [2024-06-27 16:33:43,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 193 transitions, 2083 flow, removed 9 selfloop flow, removed 22 redundant places. [2024-06-27 16:33:43,027 INFO L231 Difference]: Finished difference. Result has 184 places, 173 transitions, 1809 flow [2024-06-27 16:33:43,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1509, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1809, PETRI_PLACES=184, PETRI_TRANSITIONS=173} [2024-06-27 16:33:43,028 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 162 predicate places. [2024-06-27 16:33:43,028 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 173 transitions, 1809 flow [2024-06-27 16:33:43,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.777777777777778) internal successors, (172), 36 states have internal predecessors, (172), 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 16:33:43,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:43,028 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:43,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2024-06-27 16:33:43,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-06-27 16:33:43,241 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:33:43,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:43,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1159621149, now seen corresponding path program 48 times [2024-06-27 16:33:43,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:43,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534941462] [2024-06-27 16:33:43,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:43,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:43,800 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:33:43,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:43,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534941462] [2024-06-27 16:33:43,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534941462] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:43,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825711941] [2024-06-27 16:33:43,800 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:33:43,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:43,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:43,801 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:33:43,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-06-27 16:33:44,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:33:44,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:44,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:33:44,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:44,143 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:33:44,143 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 27 treesize of output 19 [2024-06-27 16:33:44,150 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:44,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:44,391 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-06-27 16:33:44,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-06-27 16:33:44,482 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:44,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825711941] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:44,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:44,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 30 [2024-06-27 16:33:44,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088280795] [2024-06-27 16:33:44,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:44,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:33:44,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:44,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:33:44,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:33:44,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:44,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 173 transitions, 1809 flow. Second operand has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 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 16:33:44,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:44,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:44,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:45,251 INFO L124 PetriNetUnfolderBase]: 664/1177 cut-off events. [2024-06-27 16:33:45,251 INFO L125 PetriNetUnfolderBase]: For 6632/6632 co-relation queries the response was YES. [2024-06-27 16:33:45,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7014 conditions, 1177 events. 664/1177 cut-off events. For 6632/6632 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 5833 event pairs, 58 based on Foata normal form. 3/1180 useless extension candidates. Maximal degree in co-relation 6959. Up to 780 conditions per place. [2024-06-27 16:33:45,259 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 137 selfloop transitions, 85 changer transitions 3/226 dead transitions. [2024-06-27 16:33:45,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 226 transitions, 2632 flow [2024-06-27 16:33:45,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 16:33:45,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 16:33:45,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 183 transitions. [2024-06-27 16:33:45,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3327272727272727 [2024-06-27 16:33:45,261 INFO L175 Difference]: Start difference. First operand has 184 places, 173 transitions, 1809 flow. Second operand 25 states and 183 transitions. [2024-06-27 16:33:45,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 226 transitions, 2632 flow [2024-06-27 16:33:45,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 226 transitions, 2464 flow, removed 36 selfloop flow, removed 13 redundant places. [2024-06-27 16:33:45,289 INFO L231 Difference]: Finished difference. Result has 198 places, 182 transitions, 1960 flow [2024-06-27 16:33:45,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1641, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1960, PETRI_PLACES=198, PETRI_TRANSITIONS=182} [2024-06-27 16:33:45,290 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 176 predicate places. [2024-06-27 16:33:45,290 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 182 transitions, 1960 flow [2024-06-27 16:33:45,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 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 16:33:45,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:45,291 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:45,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2024-06-27 16:33:45,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-06-27 16:33:45,502 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:33:45,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:45,502 INFO L85 PathProgramCache]: Analyzing trace with hash 472560285, now seen corresponding path program 49 times [2024-06-27 16:33:45,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:45,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977940350] [2024-06-27 16:33:45,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:45,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:45,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:33:46,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:46,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977940350] [2024-06-27 16:33:46,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977940350] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:46,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681349545] [2024-06-27 16:33:46,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:33:46,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:46,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:46,127 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:33:46,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-06-27 16:33:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:46,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 16:33:46,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:46,451 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:33:46,452 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 35 treesize of output 23 [2024-06-27 16:33:46,506 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:46,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:46,853 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-06-27 16:33:46,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-06-27 16:33:46,918 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:46,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681349545] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:46,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:46,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 32 [2024-06-27 16:33:46,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345566011] [2024-06-27 16:33:46,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:46,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-06-27 16:33:46,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:46,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-06-27 16:33:46,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2024-06-27 16:33:46,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:46,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 182 transitions, 1960 flow. Second operand has 32 states, 32 states have (on average 4.65625) internal successors, (149), 32 states have internal predecessors, (149), 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 16:33:46,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:46,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:46,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:47,767 INFO L124 PetriNetUnfolderBase]: 668/1188 cut-off events. [2024-06-27 16:33:47,767 INFO L125 PetriNetUnfolderBase]: For 7137/7137 co-relation queries the response was YES. [2024-06-27 16:33:47,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7356 conditions, 1188 events. 668/1188 cut-off events. For 7137/7137 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 5924 event pairs, 88 based on Foata normal form. 1/1189 useless extension candidates. Maximal degree in co-relation 7298. Up to 860 conditions per place. [2024-06-27 16:33:47,774 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 123 selfloop transitions, 77 changer transitions 4/205 dead transitions. [2024-06-27 16:33:47,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 205 transitions, 2491 flow [2024-06-27 16:33:47,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-27 16:33:47,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-27 16:33:47,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 133 transitions. [2024-06-27 16:33:47,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30227272727272725 [2024-06-27 16:33:47,775 INFO L175 Difference]: Start difference. First operand has 198 places, 182 transitions, 1960 flow. Second operand 20 states and 133 transitions. [2024-06-27 16:33:47,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 205 transitions, 2491 flow [2024-06-27 16:33:47,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 205 transitions, 2318 flow, removed 29 selfloop flow, removed 19 redundant places. [2024-06-27 16:33:47,803 INFO L231 Difference]: Finished difference. Result has 201 places, 183 transitions, 1984 flow [2024-06-27 16:33:47,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1787, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1984, PETRI_PLACES=201, PETRI_TRANSITIONS=183} [2024-06-27 16:33:47,808 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 179 predicate places. [2024-06-27 16:33:47,808 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 183 transitions, 1984 flow [2024-06-27 16:33:47,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.65625) internal successors, (149), 32 states have internal predecessors, (149), 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 16:33:47,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:47,809 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:47,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2024-06-27 16:33:48,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-06-27 16:33:48,016 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:33:48,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:48,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1691008065, now seen corresponding path program 50 times [2024-06-27 16:33:48,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:48,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375836641] [2024-06-27 16:33:48,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:48,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:48,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:48,594 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:33:48,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:48,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375836641] [2024-06-27 16:33:48,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375836641] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:48,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346085297] [2024-06-27 16:33:48,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:33:48,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:48,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:48,595 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:33:48,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-06-27 16:33:48,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:33:48,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:48,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 45 conjunts are in the unsatisfiable core [2024-06-27 16:33:48,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:48,966 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:33:48,966 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 27 treesize of output 19 [2024-06-27 16:33:49,001 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:33:49,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:49,313 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-06-27 16:33:49,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-06-27 16:33:49,416 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:49,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346085297] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:49,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:49,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 10] total 31 [2024-06-27 16:33:49,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455529923] [2024-06-27 16:33:49,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:49,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-27 16:33:49,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:49,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-27 16:33:49,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2024-06-27 16:33:49,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:49,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 183 transitions, 1984 flow. Second operand has 31 states, 31 states have (on average 4.741935483870968) internal successors, (147), 31 states have internal predecessors, (147), 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 16:33:49,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:49,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:49,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:50,253 INFO L124 PetriNetUnfolderBase]: 729/1299 cut-off events. [2024-06-27 16:33:50,254 INFO L125 PetriNetUnfolderBase]: For 9068/9068 co-relation queries the response was YES. [2024-06-27 16:33:50,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8233 conditions, 1299 events. 729/1299 cut-off events. For 9068/9068 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 6679 event pairs, 89 based on Foata normal form. 2/1301 useless extension candidates. Maximal degree in co-relation 8172. Up to 1102 conditions per place. [2024-06-27 16:33:50,263 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 173 selfloop transitions, 61 changer transitions 3/238 dead transitions. [2024-06-27 16:33:50,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 238 transitions, 2912 flow [2024-06-27 16:33:50,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-06-27 16:33:50,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-06-27 16:33:50,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 170 transitions. [2024-06-27 16:33:50,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32196969696969696 [2024-06-27 16:33:50,264 INFO L175 Difference]: Start difference. First operand has 201 places, 183 transitions, 1984 flow. Second operand 24 states and 170 transitions. [2024-06-27 16:33:50,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 238 transitions, 2912 flow [2024-06-27 16:33:50,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 238 transitions, 2746 flow, removed 10 selfloop flow, removed 18 redundant places. [2024-06-27 16:33:50,301 INFO L231 Difference]: Finished difference. Result has 213 places, 207 transitions, 2312 flow [2024-06-27 16:33:50,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1820, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2312, PETRI_PLACES=213, PETRI_TRANSITIONS=207} [2024-06-27 16:33:50,301 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 191 predicate places. [2024-06-27 16:33:50,301 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 207 transitions, 2312 flow [2024-06-27 16:33:50,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.741935483870968) internal successors, (147), 31 states have internal predecessors, (147), 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 16:33:50,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:50,302 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:50,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-06-27 16:33:50,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-06-27 16:33:50,513 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:33:50,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:50,514 INFO L85 PathProgramCache]: Analyzing trace with hash -227644477, now seen corresponding path program 51 times [2024-06-27 16:33:50,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:50,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669693933] [2024-06-27 16:33:50,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:50,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:50,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:33:51,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:51,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669693933] [2024-06-27 16:33:51,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669693933] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:51,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971453773] [2024-06-27 16:33:51,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:33:51,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:51,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:51,149 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:33:51,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-06-27 16:33:51,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:33:51,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:51,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:33:51,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:51,525 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:33:51,525 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 27 treesize of output 19 [2024-06-27 16:33:51,556 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:51,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:51,862 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-06-27 16:33:51,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-06-27 16:33:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:51,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971453773] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:51,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:51,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 32 [2024-06-27 16:33:51,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46621515] [2024-06-27 16:33:51,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:51,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-06-27 16:33:51,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:51,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-06-27 16:33:51,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2024-06-27 16:33:51,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:51,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 207 transitions, 2312 flow. Second operand has 32 states, 32 states have (on average 4.71875) internal successors, (151), 32 states have internal predecessors, (151), 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 16:33:51,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:51,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:51,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:53,298 INFO L124 PetriNetUnfolderBase]: 812/1452 cut-off events. [2024-06-27 16:33:53,299 INFO L125 PetriNetUnfolderBase]: For 12486/12486 co-relation queries the response was YES. [2024-06-27 16:33:53,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9740 conditions, 1452 events. 812/1452 cut-off events. For 12486/12486 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 7692 event pairs, 94 based on Foata normal form. 4/1456 useless extension candidates. Maximal degree in co-relation 9673. Up to 1254 conditions per place. [2024-06-27 16:33:53,310 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 199 selfloop transitions, 57 changer transitions 5/262 dead transitions. [2024-06-27 16:33:53,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 262 transitions, 3400 flow [2024-06-27 16:33:53,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 16:33:53,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 16:33:53,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 172 transitions. [2024-06-27 16:33:53,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31272727272727274 [2024-06-27 16:33:53,312 INFO L175 Difference]: Start difference. First operand has 213 places, 207 transitions, 2312 flow. Second operand 25 states and 172 transitions. [2024-06-27 16:33:53,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 262 transitions, 3400 flow [2024-06-27 16:33:53,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 262 transitions, 3163 flow, removed 89 selfloop flow, removed 14 redundant places. [2024-06-27 16:33:53,363 INFO L231 Difference]: Finished difference. Result has 228 places, 227 transitions, 2577 flow [2024-06-27 16:33:53,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2076, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2577, PETRI_PLACES=228, PETRI_TRANSITIONS=227} [2024-06-27 16:33:53,365 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 206 predicate places. [2024-06-27 16:33:53,365 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 227 transitions, 2577 flow [2024-06-27 16:33:53,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.71875) internal successors, (151), 32 states have internal predecessors, (151), 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 16:33:53,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:53,365 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:53,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2024-06-27 16:33:53,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:53,577 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:33:53,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:53,578 INFO L85 PathProgramCache]: Analyzing trace with hash 631824699, now seen corresponding path program 52 times [2024-06-27 16:33:53,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:53,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397654908] [2024-06-27 16:33:53,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:53,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:54,246 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:33:54,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:54,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397654908] [2024-06-27 16:33:54,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397654908] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:54,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541615450] [2024-06-27 16:33:54,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:33:54,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:54,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:54,248 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:33:54,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-06-27 16:33:54,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:33:54,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:54,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 16:33:54,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:54,582 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:33:54,582 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 35 treesize of output 23 [2024-06-27 16:33:54,637 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:54,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:54,948 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-06-27 16:33:54,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-06-27 16:33:55,031 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:55,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541615450] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:55,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:55,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 33 [2024-06-27 16:33:55,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899914366] [2024-06-27 16:33:55,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:55,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 16:33:55,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:55,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 16:33:55,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 16:33:55,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:55,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 227 transitions, 2577 flow. Second operand has 33 states, 33 states have (on average 4.636363636363637) internal successors, (153), 33 states have internal predecessors, (153), 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 16:33:55,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:55,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:55,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:56,320 INFO L124 PetriNetUnfolderBase]: 818/1476 cut-off events. [2024-06-27 16:33:56,320 INFO L125 PetriNetUnfolderBase]: For 16368/16368 co-relation queries the response was YES. [2024-06-27 16:33:56,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10241 conditions, 1476 events. 818/1476 cut-off events. For 16368/16368 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 7944 event pairs, 103 based on Foata normal form. 3/1477 useless extension candidates. Maximal degree in co-relation 10169. Up to 1245 conditions per place. [2024-06-27 16:33:56,330 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 200 selfloop transitions, 58 changer transitions 5/264 dead transitions. [2024-06-27 16:33:56,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 264 transitions, 3432 flow [2024-06-27 16:33:56,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-06-27 16:33:56,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-06-27 16:33:56,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 166 transitions. [2024-06-27 16:33:56,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3143939393939394 [2024-06-27 16:33:56,331 INFO L175 Difference]: Start difference. First operand has 228 places, 227 transitions, 2577 flow. Second operand 24 states and 166 transitions. [2024-06-27 16:33:56,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 264 transitions, 3432 flow [2024-06-27 16:33:56,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 264 transitions, 3226 flow, removed 83 selfloop flow, removed 13 redundant places. [2024-06-27 16:33:56,390 INFO L231 Difference]: Finished difference. Result has 240 places, 230 transitions, 2574 flow [2024-06-27 16:33:56,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2371, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2574, PETRI_PLACES=240, PETRI_TRANSITIONS=230} [2024-06-27 16:33:56,390 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 218 predicate places. [2024-06-27 16:33:56,390 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 230 transitions, 2574 flow [2024-06-27 16:33:56,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.636363636363637) internal successors, (153), 33 states have internal predecessors, (153), 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 16:33:56,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:56,391 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:56,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2024-06-27 16:33:56,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:56,602 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:33:56,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:56,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1503398981, now seen corresponding path program 53 times [2024-06-27 16:33:56,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:56,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615761434] [2024-06-27 16:33:56,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:56,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:57,158 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:33:57,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:57,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615761434] [2024-06-27 16:33:57,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615761434] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:57,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44535446] [2024-06-27 16:33:57,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:33:57,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:57,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:57,160 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:33:57,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-06-27 16:33:57,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:33:57,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:33:57,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 39 conjunts are in the unsatisfiable core [2024-06-27 16:33:57,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:33:57,624 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-06-27 16:33:57,624 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 45 treesize of output 24 [2024-06-27 16:33:57,656 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:57,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:33:57,824 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:33:57,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 128 [2024-06-27 16:33:58,107 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:33:58,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44535446] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:33:58,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:33:58,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 10] total 35 [2024-06-27 16:33:58,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930021293] [2024-06-27 16:33:58,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:33:58,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-06-27 16:33:58,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:33:58,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-06-27 16:33:58,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2024-06-27 16:33:58,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:33:58,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 230 transitions, 2574 flow. Second operand has 35 states, 35 states have (on average 4.771428571428571) internal successors, (167), 35 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 16:33:58,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:33:58,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:33:58,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:33:59,103 INFO L124 PetriNetUnfolderBase]: 847/1536 cut-off events. [2024-06-27 16:33:59,103 INFO L125 PetriNetUnfolderBase]: For 17550/17550 co-relation queries the response was YES. [2024-06-27 16:33:59,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10583 conditions, 1536 events. 847/1536 cut-off events. For 17550/17550 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 8431 event pairs, 323 based on Foata normal form. 5/1539 useless extension candidates. Maximal degree in co-relation 10509. Up to 1341 conditions per place. [2024-06-27 16:33:59,116 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 211 selfloop transitions, 58 changer transitions 11/281 dead transitions. [2024-06-27 16:33:59,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 281 transitions, 3672 flow [2024-06-27 16:33:59,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-06-27 16:33:59,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-06-27 16:33:59,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 168 transitions. [2024-06-27 16:33:59,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-06-27 16:33:59,117 INFO L175 Difference]: Start difference. First operand has 240 places, 230 transitions, 2574 flow. Second operand 24 states and 168 transitions. [2024-06-27 16:33:59,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 281 transitions, 3672 flow [2024-06-27 16:33:59,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 281 transitions, 3557 flow, removed 18 selfloop flow, removed 20 redundant places. [2024-06-27 16:33:59,178 INFO L231 Difference]: Finished difference. Result has 250 places, 245 transitions, 2882 flow [2024-06-27 16:33:59,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2459, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2882, PETRI_PLACES=250, PETRI_TRANSITIONS=245} [2024-06-27 16:33:59,178 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 228 predicate places. [2024-06-27 16:33:59,179 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 245 transitions, 2882 flow [2024-06-27 16:33:59,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.771428571428571) internal successors, (167), 35 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 16:33:59,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:33:59,179 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:33:59,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2024-06-27 16:33:59,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:59,391 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:33:59,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:33:59,391 INFO L85 PathProgramCache]: Analyzing trace with hash -469874177, now seen corresponding path program 54 times [2024-06-27 16:33:59,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:33:59,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735809426] [2024-06-27 16:33:59,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:33:59,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:33:59,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:33:59,941 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:33:59,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:33:59,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735809426] [2024-06-27 16:33:59,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735809426] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:33:59,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715110847] [2024-06-27 16:33:59,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:33:59,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:33:59,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:33:59,943 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:33:59,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-06-27 16:34:00,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 16:34:00,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:34:00,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 41 conjunts are in the unsatisfiable core [2024-06-27 16:34:00,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:34:00,296 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:34:00,296 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 27 treesize of output 19 [2024-06-27 16:34:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:34:00,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:34:00,623 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-06-27 16:34:00,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-06-27 16:34:00,738 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:00,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715110847] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:34:00,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:34:00,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 10] total 33 [2024-06-27 16:34:00,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725777448] [2024-06-27 16:34:00,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:34:00,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 16:34:00,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:34:00,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 16:34:00,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 16:34:00,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:34:00,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 245 transitions, 2882 flow. Second operand has 33 states, 33 states have (on average 4.7272727272727275) internal successors, (156), 33 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 16:34:00,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:34:00,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:34:00,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:34:01,689 INFO L124 PetriNetUnfolderBase]: 860/1557 cut-off events. [2024-06-27 16:34:01,689 INFO L125 PetriNetUnfolderBase]: For 20525/20525 co-relation queries the response was YES. [2024-06-27 16:34:01,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11270 conditions, 1557 events. 860/1557 cut-off events. For 20525/20525 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 8505 event pairs, 114 based on Foata normal form. 2/1557 useless extension candidates. Maximal degree in co-relation 11189. Up to 1342 conditions per place. [2024-06-27 16:34:01,703 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 214 selfloop transitions, 60 changer transitions 5/280 dead transitions. [2024-06-27 16:34:01,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 280 transitions, 3766 flow [2024-06-27 16:34:01,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 16:34:01,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 16:34:01,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 169 transitions. [2024-06-27 16:34:01,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30727272727272725 [2024-06-27 16:34:01,705 INFO L175 Difference]: Start difference. First operand has 250 places, 245 transitions, 2882 flow. Second operand 25 states and 169 transitions. [2024-06-27 16:34:01,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 280 transitions, 3766 flow [2024-06-27 16:34:01,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 280 transitions, 3524 flow, removed 92 selfloop flow, removed 15 redundant places. [2024-06-27 16:34:01,774 INFO L231 Difference]: Finished difference. Result has 259 places, 247 transitions, 2848 flow [2024-06-27 16:34:01,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2642, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2848, PETRI_PLACES=259, PETRI_TRANSITIONS=247} [2024-06-27 16:34:01,775 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 237 predicate places. [2024-06-27 16:34:01,775 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 247 transitions, 2848 flow [2024-06-27 16:34:01,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.7272727272727275) internal successors, (156), 33 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 16:34:01,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:34:01,775 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:34:01,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2024-06-27 16:34:01,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2024-06-27 16:34:01,988 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:34:01,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:34:01,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1566651873, now seen corresponding path program 55 times [2024-06-27 16:34:01,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:34:02,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157675096] [2024-06-27 16:34:02,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:34:02,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:34:02,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:34:02,586 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:34:02,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:34:02,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157675096] [2024-06-27 16:34:02,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157675096] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:34:02,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605072822] [2024-06-27 16:34:02,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:34:02,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:34:02,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:34:02,587 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:34:02,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-06-27 16:34:02,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:34:02,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 16:34:02,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:34:02,916 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:34:02,916 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 35 treesize of output 23 [2024-06-27 16:34:02,969 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:02,969 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:34:03,222 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-06-27 16:34:03,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-06-27 16:34:03,289 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:03,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605072822] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:34:03,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:34:03,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 33 [2024-06-27 16:34:03,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521857480] [2024-06-27 16:34:03,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:34:03,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 16:34:03,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:34:03,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 16:34:03,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 16:34:03,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:34:03,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 247 transitions, 2848 flow. Second operand has 33 states, 33 states have (on average 4.636363636363637) internal successors, (153), 33 states have internal predecessors, (153), 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 16:34:03,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:34:03,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:34:03,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:34:04,415 INFO L124 PetriNetUnfolderBase]: 878/1612 cut-off events. [2024-06-27 16:34:04,416 INFO L125 PetriNetUnfolderBase]: For 23337/23337 co-relation queries the response was YES. [2024-06-27 16:34:04,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11681 conditions, 1612 events. 878/1612 cut-off events. For 23337/23337 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 9066 event pairs, 125 based on Foata normal form. 3/1613 useless extension candidates. Maximal degree in co-relation 11600. Up to 1339 conditions per place. [2024-06-27 16:34:04,430 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 216 selfloop transitions, 64 changer transitions 6/287 dead transitions. [2024-06-27 16:34:04,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 287 transitions, 3791 flow [2024-06-27 16:34:04,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 16:34:04,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 16:34:04,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 175 transitions. [2024-06-27 16:34:04,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-06-27 16:34:04,431 INFO L175 Difference]: Start difference. First operand has 259 places, 247 transitions, 2848 flow. Second operand 25 states and 175 transitions. [2024-06-27 16:34:04,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 287 transitions, 3791 flow [2024-06-27 16:34:04,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 287 transitions, 3668 flow, removed 20 selfloop flow, removed 22 redundant places. [2024-06-27 16:34:04,510 INFO L231 Difference]: Finished difference. Result has 265 places, 252 transitions, 3004 flow [2024-06-27 16:34:04,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2727, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3004, PETRI_PLACES=265, PETRI_TRANSITIONS=252} [2024-06-27 16:34:04,512 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 243 predicate places. [2024-06-27 16:34:04,512 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 252 transitions, 3004 flow [2024-06-27 16:34:04,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.636363636363637) internal successors, (153), 33 states have internal predecessors, (153), 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 16:34:04,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:34:04,513 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:34:04,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2024-06-27 16:34:04,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2024-06-27 16:34:04,725 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:34:04,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:34:04,726 INFO L85 PathProgramCache]: Analyzing trace with hash 2068266775, now seen corresponding path program 56 times [2024-06-27 16:34:04,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:34:04,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428226454] [2024-06-27 16:34:04,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:34:04,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:34:04,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:34:05,293 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:34:05,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:34:05,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428226454] [2024-06-27 16:34:05,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428226454] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:34:05,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746555641] [2024-06-27 16:34:05,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:34:05,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:34:05,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:34:05,294 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:34:05,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-06-27 16:34:05,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:34:05,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:34:05,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 45 conjunts are in the unsatisfiable core [2024-06-27 16:34:05,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:34:05,691 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:34:05,692 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 27 treesize of output 19 [2024-06-27 16:34:05,714 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:34:05,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:34:05,952 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-06-27 16:34:05,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-06-27 16:34:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:06,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746555641] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:34:06,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:34:06,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 10] total 33 [2024-06-27 16:34:06,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255200802] [2024-06-27 16:34:06,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:34:06,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 16:34:06,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:34:06,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 16:34:06,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 16:34:06,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:34:06,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 252 transitions, 3004 flow. Second operand has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 33 states have internal predecessors, (155), 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 16:34:06,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:34:06,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:34:06,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:34:07,046 INFO L124 PetriNetUnfolderBase]: 938/1724 cut-off events. [2024-06-27 16:34:07,047 INFO L125 PetriNetUnfolderBase]: For 27583/27583 co-relation queries the response was YES. [2024-06-27 16:34:07,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12938 conditions, 1724 events. 938/1724 cut-off events. For 27583/27583 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 9871 event pairs, 305 based on Foata normal form. 2/1726 useless extension candidates. Maximal degree in co-relation 12854. Up to 1501 conditions per place. [2024-06-27 16:34:07,064 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 242 selfloop transitions, 61 changer transitions 4/308 dead transitions. [2024-06-27 16:34:07,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 308 transitions, 4367 flow [2024-06-27 16:34:07,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 16:34:07,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 16:34:07,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 173 transitions. [2024-06-27 16:34:07,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3145454545454546 [2024-06-27 16:34:07,065 INFO L175 Difference]: Start difference. First operand has 265 places, 252 transitions, 3004 flow. Second operand 25 states and 173 transitions. [2024-06-27 16:34:07,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 308 transitions, 4367 flow [2024-06-27 16:34:07,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 308 transitions, 4249 flow, removed 23 selfloop flow, removed 19 redundant places. [2024-06-27 16:34:07,167 INFO L231 Difference]: Finished difference. Result has 275 places, 270 transitions, 3484 flow [2024-06-27 16:34:07,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2890, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3484, PETRI_PLACES=275, PETRI_TRANSITIONS=270} [2024-06-27 16:34:07,168 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 253 predicate places. [2024-06-27 16:34:07,168 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 270 transitions, 3484 flow [2024-06-27 16:34:07,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 33 states have internal predecessors, (155), 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 16:34:07,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:34:07,169 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:34:07,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2024-06-27 16:34:07,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:34:07,381 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:34:07,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:34:07,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1367231345, now seen corresponding path program 57 times [2024-06-27 16:34:07,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:34:07,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816280676] [2024-06-27 16:34:07,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:34:07,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:34:07,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:34:08,004 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:34:08,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:34:08,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816280676] [2024-06-27 16:34:08,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816280676] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:34:08,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240138563] [2024-06-27 16:34:08,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:34:08,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:34:08,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:34:08,085 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:34:08,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-06-27 16:34:08,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:34:08,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:34:08,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 45 conjunts are in the unsatisfiable core [2024-06-27 16:34:08,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:34:08,469 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:34:08,470 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 27 treesize of output 19 [2024-06-27 16:34:08,515 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:34:08,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:34:08,758 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-06-27 16:34:08,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-06-27 16:34:08,863 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:08,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240138563] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:34:08,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:34:08,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 10] total 33 [2024-06-27 16:34:08,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493939621] [2024-06-27 16:34:08,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:34:08,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 16:34:08,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:34:08,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 16:34:08,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 16:34:08,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:34:08,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 270 transitions, 3484 flow. Second operand has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 33 states have internal predecessors, (155), 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 16:34:08,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:34:08,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:34:08,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:34:10,128 INFO L124 PetriNetUnfolderBase]: 942/1740 cut-off events. [2024-06-27 16:34:10,128 INFO L125 PetriNetUnfolderBase]: For 34784/34784 co-relation queries the response was YES. [2024-06-27 16:34:10,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13727 conditions, 1740 events. 942/1740 cut-off events. For 34784/34784 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 10035 event pairs, 311 based on Foata normal form. 2/1740 useless extension candidates. Maximal degree in co-relation 13639. Up to 1495 conditions per place. [2024-06-27 16:34:10,143 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 244 selfloop transitions, 61 changer transitions 5/311 dead transitions. [2024-06-27 16:34:10,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 311 transitions, 4507 flow [2024-06-27 16:34:10,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 16:34:10,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 16:34:10,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 175 transitions. [2024-06-27 16:34:10,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-06-27 16:34:10,150 INFO L175 Difference]: Start difference. First operand has 275 places, 270 transitions, 3484 flow. Second operand 25 states and 175 transitions. [2024-06-27 16:34:10,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 311 transitions, 4507 flow [2024-06-27 16:34:10,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 311 transitions, 4222 flow, removed 121 selfloop flow, removed 14 redundant places. [2024-06-27 16:34:10,268 INFO L231 Difference]: Finished difference. Result has 287 places, 272 transitions, 3396 flow [2024-06-27 16:34:10,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3199, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3396, PETRI_PLACES=287, PETRI_TRANSITIONS=272} [2024-06-27 16:34:10,279 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 265 predicate places. [2024-06-27 16:34:10,279 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 272 transitions, 3396 flow [2024-06-27 16:34:10,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 33 states have internal predecessors, (155), 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 16:34:10,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:34:10,280 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:34:10,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2024-06-27 16:34:10,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:34:10,494 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:34:10,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:34:10,494 INFO L85 PathProgramCache]: Analyzing trace with hash 792512271, now seen corresponding path program 58 times [2024-06-27 16:34:10,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:34:10,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027189132] [2024-06-27 16:34:10,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:34:10,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:34:10,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:34:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-06-27 16:34:11,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:34:11,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027189132] [2024-06-27 16:34:11,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027189132] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:34:11,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193406377] [2024-06-27 16:34:11,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:34:11,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:34:11,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:34:11,417 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:34:11,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-06-27 16:34:11,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:34:11,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:34:11,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 16:34:11,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:34:11,773 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:34:11,773 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 35 treesize of output 23 [2024-06-27 16:34:11,801 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:11,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:34:12,097 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-06-27 16:34:12,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-06-27 16:34:12,170 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:12,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193406377] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:34:12,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:34:12,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 33 [2024-06-27 16:34:12,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878013705] [2024-06-27 16:34:12,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:34:12,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 16:34:12,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:34:12,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 16:34:12,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 16:34:12,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:34:12,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 272 transitions, 3396 flow. Second operand has 33 states, 33 states have (on average 4.606060606060606) internal successors, (152), 33 states have internal predecessors, (152), 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 16:34:12,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:34:12,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:34:12,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:34:13,579 INFO L124 PetriNetUnfolderBase]: 999/1853 cut-off events. [2024-06-27 16:34:13,580 INFO L125 PetriNetUnfolderBase]: For 39110/39110 co-relation queries the response was YES. [2024-06-27 16:34:13,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14621 conditions, 1853 events. 999/1853 cut-off events. For 39110/39110 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 10801 event pairs, 318 based on Foata normal form. 3/1854 useless extension candidates. Maximal degree in co-relation 14531. Up to 1612 conditions per place. [2024-06-27 16:34:13,595 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 260 selfloop transitions, 70 changer transitions 2/333 dead transitions. [2024-06-27 16:34:13,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 333 transitions, 4776 flow [2024-06-27 16:34:13,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-06-27 16:34:13,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-06-27 16:34:13,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 199 transitions. [2024-06-27 16:34:13,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29178885630498536 [2024-06-27 16:34:13,622 INFO L175 Difference]: Start difference. First operand has 287 places, 272 transitions, 3396 flow. Second operand 31 states and 199 transitions. [2024-06-27 16:34:13,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 333 transitions, 4776 flow [2024-06-27 16:34:13,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 333 transitions, 4594 flow, removed 25 selfloop flow, removed 21 redundant places. [2024-06-27 16:34:13,757 INFO L231 Difference]: Finished difference. Result has 302 places, 298 transitions, 3833 flow [2024-06-27 16:34:13,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3236, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3833, PETRI_PLACES=302, PETRI_TRANSITIONS=298} [2024-06-27 16:34:13,758 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 280 predicate places. [2024-06-27 16:34:13,758 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 298 transitions, 3833 flow [2024-06-27 16:34:13,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.606060606060606) internal successors, (152), 33 states have internal predecessors, (152), 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 16:34:13,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:34:13,759 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:34:13,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2024-06-27 16:34:13,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2024-06-27 16:34:13,971 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:34:13,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:34:13,971 INFO L85 PathProgramCache]: Analyzing trace with hash -328478129, now seen corresponding path program 59 times [2024-06-27 16:34:13,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:34:13,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007425267] [2024-06-27 16:34:13,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:34:13,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:34:14,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:34:14,646 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:34:14,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:34:14,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007425267] [2024-06-27 16:34:14,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007425267] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:34:14,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351747165] [2024-06-27 16:34:14,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:34:14,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:34:14,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:34:14,648 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:34:14,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-06-27 16:34:14,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:34:14,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:34:14,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 35 conjunts are in the unsatisfiable core [2024-06-27 16:34:14,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:34:15,101 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:34:15,101 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 31 treesize of output 23 [2024-06-27 16:34:15,133 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:15,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:34:15,410 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-06-27 16:34:15,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-06-27 16:34:15,500 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:15,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351747165] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:34:15,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:34:15,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 10] total 36 [2024-06-27 16:34:15,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412534237] [2024-06-27 16:34:15,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:34:15,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-06-27 16:34:15,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:34:15,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-06-27 16:34:15,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2024-06-27 16:34:15,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:34:15,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 298 transitions, 3833 flow. Second operand has 36 states, 36 states have (on average 4.777777777777778) internal successors, (172), 36 states have internal predecessors, (172), 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 16:34:15,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:34:15,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:34:15,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:34:16,883 INFO L124 PetriNetUnfolderBase]: 1079/1995 cut-off events. [2024-06-27 16:34:16,884 INFO L125 PetriNetUnfolderBase]: For 48102/48102 co-relation queries the response was YES. [2024-06-27 16:34:16,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16657 conditions, 1995 events. 1079/1995 cut-off events. For 48102/48102 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 11848 event pairs, 330 based on Foata normal form. 3/1996 useless extension candidates. Maximal degree in co-relation 16561. Up to 1762 conditions per place. [2024-06-27 16:34:16,905 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 274 selfloop transitions, 74 changer transitions 4/353 dead transitions. [2024-06-27 16:34:16,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 353 transitions, 5380 flow [2024-06-27 16:34:16,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 16:34:16,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-27 16:34:16,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 174 transitions. [2024-06-27 16:34:16,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3041958041958042 [2024-06-27 16:34:16,907 INFO L175 Difference]: Start difference. First operand has 302 places, 298 transitions, 3833 flow. Second operand 26 states and 174 transitions. [2024-06-27 16:34:16,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 353 transitions, 5380 flow [2024-06-27 16:34:17,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 353 transitions, 5059 flow, removed 123 selfloop flow, removed 14 redundant places. [2024-06-27 16:34:17,070 INFO L231 Difference]: Finished difference. Result has 317 places, 323 transitions, 4357 flow [2024-06-27 16:34:17,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3514, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4357, PETRI_PLACES=317, PETRI_TRANSITIONS=323} [2024-06-27 16:34:17,071 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 295 predicate places. [2024-06-27 16:34:17,071 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 323 transitions, 4357 flow [2024-06-27 16:34:17,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.777777777777778) internal successors, (172), 36 states have internal predecessors, (172), 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 16:34:17,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:34:17,071 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:34:17,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2024-06-27 16:34:17,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-06-27 16:34:17,284 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:34:17,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:34:17,284 INFO L85 PathProgramCache]: Analyzing trace with hash 545262551, now seen corresponding path program 60 times [2024-06-27 16:34:17,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:34:17,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948291135] [2024-06-27 16:34:17,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:34:17,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:34:17,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:34:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:34:17,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:34:17,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948291135] [2024-06-27 16:34:17,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948291135] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:34:17,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41770285] [2024-06-27 16:34:17,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:34:17,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:34:17,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:34:17,887 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:34:17,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-06-27 16:34:18,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:34:18,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:34:18,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:34:18,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:34:18,267 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:34:18,268 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 27 treesize of output 19 [2024-06-27 16:34:18,296 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:18,297 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:34:18,640 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-06-27 16:34:18,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-06-27 16:34:18,739 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:18,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41770285] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:34:18,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:34:18,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 32 [2024-06-27 16:34:18,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595839792] [2024-06-27 16:34:18,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:34:18,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-06-27 16:34:18,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:34:18,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-06-27 16:34:18,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2024-06-27 16:34:18,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:34:18,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 323 transitions, 4357 flow. Second operand has 32 states, 32 states have (on average 4.71875) internal successors, (151), 32 states have internal predecessors, (151), 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 16:34:18,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:34:18,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:34:18,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:34:20,247 INFO L124 PetriNetUnfolderBase]: 1086/2024 cut-off events. [2024-06-27 16:34:20,247 INFO L125 PetriNetUnfolderBase]: For 50071/50071 co-relation queries the response was YES. [2024-06-27 16:34:20,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16885 conditions, 2024 events. 1086/2024 cut-off events. For 50071/50071 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 12136 event pairs, 337 based on Foata normal form. 2/2024 useless extension candidates. Maximal degree in co-relation 16785. Up to 1759 conditions per place. [2024-06-27 16:34:20,269 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 275 selfloop transitions, 76 changer transitions 5/357 dead transitions. [2024-06-27 16:34:20,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 357 transitions, 5386 flow [2024-06-27 16:34:20,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 16:34:20,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 16:34:20,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 170 transitions. [2024-06-27 16:34:20,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3090909090909091 [2024-06-27 16:34:20,270 INFO L175 Difference]: Start difference. First operand has 317 places, 323 transitions, 4357 flow. Second operand 25 states and 170 transitions. [2024-06-27 16:34:20,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 357 transitions, 5386 flow [2024-06-27 16:34:20,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 357 transitions, 4857 flow, removed 225 selfloop flow, removed 14 redundant places. [2024-06-27 16:34:20,435 INFO L231 Difference]: Finished difference. Result has 330 places, 327 transitions, 4124 flow [2024-06-27 16:34:20,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3828, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4124, PETRI_PLACES=330, PETRI_TRANSITIONS=327} [2024-06-27 16:34:20,436 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 308 predicate places. [2024-06-27 16:34:20,436 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 327 transitions, 4124 flow [2024-06-27 16:34:20,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.71875) internal successors, (151), 32 states have internal predecessors, (151), 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 16:34:20,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:34:20,437 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:34:20,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2024-06-27 16:34:20,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:34:20,649 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:34:20,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:34:20,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1859705047, now seen corresponding path program 61 times [2024-06-27 16:34:20,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:34:20,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818373377] [2024-06-27 16:34:20,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:34:20,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:34:20,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:34:21,232 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:34:21,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:34:21,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818373377] [2024-06-27 16:34:21,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818373377] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:34:21,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460805813] [2024-06-27 16:34:21,233 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:34:21,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:34:21,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:34:21,234 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:34:21,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2024-06-27 16:34:21,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:34:21,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 16:34:21,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:34:21,617 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:34:21,617 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 35 treesize of output 23 [2024-06-27 16:34:21,653 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:21,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:34:22,012 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-06-27 16:34:22,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-06-27 16:34:22,100 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:22,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460805813] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:34:22,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:34:22,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 32 [2024-06-27 16:34:22,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300092267] [2024-06-27 16:34:22,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:34:22,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-06-27 16:34:22,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:34:22,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-06-27 16:34:22,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2024-06-27 16:34:22,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:34:22,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 327 transitions, 4124 flow. Second operand has 32 states, 32 states have (on average 4.65625) internal successors, (149), 32 states have internal predecessors, (149), 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 16:34:22,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:34:22,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:34:22,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:34:23,263 INFO L124 PetriNetUnfolderBase]: 1100/2049 cut-off events. [2024-06-27 16:34:23,264 INFO L125 PetriNetUnfolderBase]: For 47893/47893 co-relation queries the response was YES. [2024-06-27 16:34:23,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16559 conditions, 2049 events. 1100/2049 cut-off events. For 47893/47893 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 12324 event pairs, 269 based on Foata normal form. 1/2048 useless extension candidates. Maximal degree in co-relation 16456. Up to 1596 conditions per place. [2024-06-27 16:34:23,286 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 255 selfloop transitions, 97 changer transitions 3/356 dead transitions. [2024-06-27 16:34:23,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 356 transitions, 5224 flow [2024-06-27 16:34:23,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 16:34:23,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 16:34:23,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 135 transitions. [2024-06-27 16:34:23,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2922077922077922 [2024-06-27 16:34:23,287 INFO L175 Difference]: Start difference. First operand has 330 places, 327 transitions, 4124 flow. Second operand 21 states and 135 transitions. [2024-06-27 16:34:23,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 356 transitions, 5224 flow [2024-06-27 16:34:23,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 356 transitions, 5055 flow, removed 34 selfloop flow, removed 19 redundant places. [2024-06-27 16:34:23,464 INFO L231 Difference]: Finished difference. Result has 333 places, 334 transitions, 4381 flow [2024-06-27 16:34:23,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3957, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4381, PETRI_PLACES=333, PETRI_TRANSITIONS=334} [2024-06-27 16:34:23,465 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 311 predicate places. [2024-06-27 16:34:23,465 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 334 transitions, 4381 flow [2024-06-27 16:34:23,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.65625) internal successors, (149), 32 states have internal predecessors, (149), 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 16:34:23,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:34:23,465 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:34:23,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2024-06-27 16:34:23,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2024-06-27 16:34:23,677 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:34:23,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:34:23,678 INFO L85 PathProgramCache]: Analyzing trace with hash -702052393, now seen corresponding path program 62 times [2024-06-27 16:34:23,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:34:23,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555701852] [2024-06-27 16:34:23,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:34:23,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:34:23,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:34:24,253 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:34:24,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:34:24,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555701852] [2024-06-27 16:34:24,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555701852] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:34:24,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769636546] [2024-06-27 16:34:24,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:34:24,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:34:24,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:34:24,255 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:34:24,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-06-27 16:34:24,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:34:24,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:34:24,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 45 conjunts are in the unsatisfiable core [2024-06-27 16:34:24,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:34:24,662 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:34:24,663 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 27 treesize of output 19 [2024-06-27 16:34:24,713 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:34:24,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:34:25,032 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-06-27 16:34:25,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-06-27 16:34:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:25,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769636546] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:34:25,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:34:25,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 10] total 32 [2024-06-27 16:34:25,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155694148] [2024-06-27 16:34:25,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:34:25,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-06-27 16:34:25,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:34:25,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-06-27 16:34:25,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2024-06-27 16:34:25,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:34:25,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 334 transitions, 4381 flow. Second operand has 32 states, 32 states have (on average 4.71875) internal successors, (151), 32 states have internal predecessors, (151), 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 16:34:25,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:34:25,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:34:25,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:34:26,181 INFO L124 PetriNetUnfolderBase]: 1102/2057 cut-off events. [2024-06-27 16:34:26,182 INFO L125 PetriNetUnfolderBase]: For 50334/50334 co-relation queries the response was YES. [2024-06-27 16:34:26,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16994 conditions, 2057 events. 1102/2057 cut-off events. For 50334/50334 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 12427 event pairs, 274 based on Foata normal form. 1/2052 useless extension candidates. Maximal degree in co-relation 16889. Up to 1588 conditions per place. [2024-06-27 16:34:26,202 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 254 selfloop transitions, 98 changer transitions 2/355 dead transitions. [2024-06-27 16:34:26,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 355 transitions, 5359 flow [2024-06-27 16:34:26,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 16:34:26,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 16:34:26,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 124 transitions. [2024-06-27 16:34:26,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2966507177033493 [2024-06-27 16:34:26,207 INFO L175 Difference]: Start difference. First operand has 333 places, 334 transitions, 4381 flow. Second operand 19 states and 124 transitions. [2024-06-27 16:34:26,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 355 transitions, 5359 flow [2024-06-27 16:34:26,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 355 transitions, 5015 flow, removed 104 selfloop flow, removed 15 redundant places. [2024-06-27 16:34:26,361 INFO L231 Difference]: Finished difference. Result has 338 places, 337 transitions, 4375 flow [2024-06-27 16:34:26,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=4099, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4375, PETRI_PLACES=338, PETRI_TRANSITIONS=337} [2024-06-27 16:34:26,362 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 316 predicate places. [2024-06-27 16:34:26,362 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 337 transitions, 4375 flow [2024-06-27 16:34:26,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.71875) internal successors, (151), 32 states have internal predecessors, (151), 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 16:34:26,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:34:26,362 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:34:26,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2024-06-27 16:34:26,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:34:26,574 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:34:26,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:34:26,575 INFO L85 PathProgramCache]: Analyzing trace with hash 499338233, now seen corresponding path program 63 times [2024-06-27 16:34:26,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:34:26,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061969087] [2024-06-27 16:34:26,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:34:26,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:34:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:34:27,157 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:34:27,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:34:27,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061969087] [2024-06-27 16:34:27,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061969087] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:34:27,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244515993] [2024-06-27 16:34:27,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:34:27,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:34:27,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:34:27,159 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:34:27,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2024-06-27 16:34:27,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:34:27,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:34:27,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:34:27,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:34:27,549 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:34:27,549 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 27 treesize of output 19 [2024-06-27 16:34:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:27,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:34:27,791 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-06-27 16:34:27,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-06-27 16:34:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:27,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244515993] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:34:27,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:34:27,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 31 [2024-06-27 16:34:27,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287134939] [2024-06-27 16:34:27,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:34:27,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-27 16:34:27,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:34:27,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-27 16:34:27,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2024-06-27 16:34:27,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:34:27,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 337 transitions, 4375 flow. Second operand has 31 states, 31 states have (on average 4.67741935483871) internal successors, (145), 31 states have internal predecessors, (145), 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 16:34:27,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:34:27,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:34:27,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:34:28,994 INFO L124 PetriNetUnfolderBase]: 1178/2196 cut-off events. [2024-06-27 16:34:28,995 INFO L125 PetriNetUnfolderBase]: For 59541/59541 co-relation queries the response was YES. [2024-06-27 16:34:29,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18980 conditions, 2196 events. 1178/2196 cut-off events. For 59541/59541 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 13383 event pairs, 272 based on Foata normal form. 3/2193 useless extension candidates. Maximal degree in co-relation 18873. Up to 1632 conditions per place. [2024-06-27 16:34:29,018 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 284 selfloop transitions, 107 changer transitions 3/395 dead transitions. [2024-06-27 16:34:29,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 395 transitions, 6212 flow [2024-06-27 16:34:29,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 16:34:29,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 16:34:29,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 179 transitions. [2024-06-27 16:34:29,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32545454545454544 [2024-06-27 16:34:29,030 INFO L175 Difference]: Start difference. First operand has 338 places, 337 transitions, 4375 flow. Second operand 25 states and 179 transitions. [2024-06-27 16:34:29,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 395 transitions, 6212 flow [2024-06-27 16:34:29,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 395 transitions, 5946 flow, removed 40 selfloop flow, removed 16 redundant places. [2024-06-27 16:34:29,219 INFO L231 Difference]: Finished difference. Result has 351 places, 352 transitions, 4858 flow [2024-06-27 16:34:29,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=4109, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4858, PETRI_PLACES=351, PETRI_TRANSITIONS=352} [2024-06-27 16:34:29,220 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 329 predicate places. [2024-06-27 16:34:29,220 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 352 transitions, 4858 flow [2024-06-27 16:34:29,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.67741935483871) internal successors, (145), 31 states have internal predecessors, (145), 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 16:34:29,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:34:29,221 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:34:29,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2024-06-27 16:34:29,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:34:29,426 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:34:29,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:34:29,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1290229443, now seen corresponding path program 64 times [2024-06-27 16:34:29,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:34:29,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167359466] [2024-06-27 16:34:29,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:34:29,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:34:29,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:34:29,973 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:34:29,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:34:29,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167359466] [2024-06-27 16:34:29,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167359466] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:34:29,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969698132] [2024-06-27 16:34:29,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:34:29,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:34:29,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:34:29,975 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:34:29,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2024-06-27 16:34:30,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:34:30,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:34:30,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 16:34:30,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:34:30,317 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:34:30,317 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 35 treesize of output 23 [2024-06-27 16:34:30,352 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:30,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:34:30,562 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-06-27 16:34:30,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-06-27 16:34:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:30,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969698132] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:34:30,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:34:30,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 32 [2024-06-27 16:34:30,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069123749] [2024-06-27 16:34:30,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:34:30,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-06-27 16:34:30,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:34:30,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-06-27 16:34:30,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2024-06-27 16:34:30,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:34:30,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 352 transitions, 4858 flow. Second operand has 32 states, 32 states have (on average 4.65625) internal successors, (149), 32 states have internal predecessors, (149), 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 16:34:30,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:34:30,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:34:30,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:34:31,762 INFO L124 PetriNetUnfolderBase]: 1220/2273 cut-off events. [2024-06-27 16:34:31,762 INFO L125 PetriNetUnfolderBase]: For 72195/72195 co-relation queries the response was YES. [2024-06-27 16:34:31,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20394 conditions, 2273 events. 1220/2273 cut-off events. For 72195/72195 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 13957 event pairs, 289 based on Foata normal form. 2/2271 useless extension candidates. Maximal degree in co-relation 20282. Up to 1720 conditions per place. [2024-06-27 16:34:31,790 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 287 selfloop transitions, 110 changer transitions 3/401 dead transitions. [2024-06-27 16:34:31,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 401 transitions, 6419 flow [2024-06-27 16:34:31,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 16:34:31,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-27 16:34:31,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 179 transitions. [2024-06-27 16:34:31,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3129370629370629 [2024-06-27 16:34:31,792 INFO L175 Difference]: Start difference. First operand has 351 places, 352 transitions, 4858 flow. Second operand 26 states and 179 transitions. [2024-06-27 16:34:31,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 401 transitions, 6419 flow [2024-06-27 16:34:32,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 401 transitions, 6041 flow, removed 135 selfloop flow, removed 17 redundant places. [2024-06-27 16:34:32,042 INFO L231 Difference]: Finished difference. Result has 361 places, 361 transitions, 5011 flow [2024-06-27 16:34:32,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=4480, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=5011, PETRI_PLACES=361, PETRI_TRANSITIONS=361} [2024-06-27 16:34:32,057 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 339 predicate places. [2024-06-27 16:34:32,057 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 361 transitions, 5011 flow [2024-06-27 16:34:32,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.65625) internal successors, (149), 32 states have internal predecessors, (149), 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 16:34:32,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:34:32,057 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:34:32,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2024-06-27 16:34:32,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2024-06-27 16:34:32,269 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:34:32,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:34:32,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1326083487, now seen corresponding path program 65 times [2024-06-27 16:34:32,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:34:32,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521415554] [2024-06-27 16:34:32,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:34:32,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:34:32,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:34:32,902 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:34:32,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:34:32,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521415554] [2024-06-27 16:34:32,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521415554] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:34:32,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946185330] [2024-06-27 16:34:32,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:34:32,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:34:32,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:34:32,904 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:34:32,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2024-06-27 16:34:33,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:34:33,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:34:33,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:34:33,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:34:33,333 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:34:33,333 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 31 treesize of output 23 [2024-06-27 16:34:33,390 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:33,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:34:33,663 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-06-27 16:34:33,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 160 treesize of output 108 [2024-06-27 16:34:33,850 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:33,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946185330] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:34:33,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:34:33,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 10] total 36 [2024-06-27 16:34:33,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570261285] [2024-06-27 16:34:33,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:34:33,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-06-27 16:34:33,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:34:33,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-06-27 16:34:33,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2024-06-27 16:34:33,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:34:33,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 361 transitions, 5011 flow. Second operand has 36 states, 36 states have (on average 4.777777777777778) internal successors, (172), 36 states have internal predecessors, (172), 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 16:34:33,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:34:33,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:34:33,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:34:35,381 INFO L124 PetriNetUnfolderBase]: 1224/2295 cut-off events. [2024-06-27 16:34:35,381 INFO L125 PetriNetUnfolderBase]: For 67942/67942 co-relation queries the response was YES. [2024-06-27 16:34:35,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20105 conditions, 2295 events. 1224/2295 cut-off events. For 67942/67942 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 14257 event pairs, 384 based on Foata normal form. 4/2295 useless extension candidates. Maximal degree in co-relation 19991. Up to 1994 conditions per place. [2024-06-27 16:34:35,407 INFO L140 encePairwiseOnDemand]: 8/22 looper letters, 307 selfloop transitions, 79 changer transitions 5/392 dead transitions. [2024-06-27 16:34:35,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 392 transitions, 6084 flow [2024-06-27 16:34:35,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 16:34:35,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 16:34:35,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 169 transitions. [2024-06-27 16:34:35,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30727272727272725 [2024-06-27 16:34:35,408 INFO L175 Difference]: Start difference. First operand has 361 places, 361 transitions, 5011 flow. Second operand 25 states and 169 transitions. [2024-06-27 16:34:35,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 392 transitions, 6084 flow [2024-06-27 16:34:35,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 392 transitions, 5802 flow, removed 87 selfloop flow, removed 20 redundant places. [2024-06-27 16:34:35,670 INFO L231 Difference]: Finished difference. Result has 368 places, 364 transitions, 5005 flow [2024-06-27 16:34:35,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=4736, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5005, PETRI_PLACES=368, PETRI_TRANSITIONS=364} [2024-06-27 16:34:35,671 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 346 predicate places. [2024-06-27 16:34:35,671 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 364 transitions, 5005 flow [2024-06-27 16:34:35,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.777777777777778) internal successors, (172), 36 states have internal predecessors, (172), 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 16:34:35,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:34:35,672 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:34:35,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2024-06-27 16:34:35,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:34:35,884 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:34:35,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:34:35,884 INFO L85 PathProgramCache]: Analyzing trace with hash -286465713, now seen corresponding path program 66 times [2024-06-27 16:34:35,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:34:35,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878431039] [2024-06-27 16:34:35,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:34:35,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:34:35,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:34:36,599 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:34:36,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:34:36,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878431039] [2024-06-27 16:34:36,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878431039] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:34:36,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143039089] [2024-06-27 16:34:36,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:34:36,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:34:36,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:34:36,601 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:34:36,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2024-06-27 16:34:36,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:34:36,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:34:36,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:34:36,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:34:37,035 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:34:37,036 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 27 treesize of output 19 [2024-06-27 16:34:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:37,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:34:37,467 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-06-27 16:34:37,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 134 treesize of output 83 [2024-06-27 16:34:37,522 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:37,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143039089] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:34:37,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:34:37,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 33 [2024-06-27 16:34:37,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530720940] [2024-06-27 16:34:37,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:34:37,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 16:34:37,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:34:37,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 16:34:37,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 16:34:37,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:34:37,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 364 transitions, 5005 flow. Second operand has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 33 states have internal predecessors, (155), 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 16:34:37,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:34:37,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:34:37,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:34:38,910 INFO L124 PetriNetUnfolderBase]: 1273/2393 cut-off events. [2024-06-27 16:34:38,910 INFO L125 PetriNetUnfolderBase]: For 77609/77609 co-relation queries the response was YES. [2024-06-27 16:34:38,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21489 conditions, 2393 events. 1273/2393 cut-off events. For 77609/77609 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 15104 event pairs, 208 based on Foata normal form. 2/2393 useless extension candidates. Maximal degree in co-relation 21373. Up to 1064 conditions per place. [2024-06-27 16:34:38,939 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 262 selfloop transitions, 142 changer transitions 4/409 dead transitions. [2024-06-27 16:34:38,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 409 transitions, 6554 flow [2024-06-27 16:34:38,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 16:34:38,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 16:34:38,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 146 transitions. [2024-06-27 16:34:38,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30165289256198347 [2024-06-27 16:34:38,940 INFO L175 Difference]: Start difference. First operand has 368 places, 364 transitions, 5005 flow. Second operand 22 states and 146 transitions. [2024-06-27 16:34:38,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 409 transitions, 6554 flow [2024-06-27 16:34:39,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 409 transitions, 6330 flow, removed 43 selfloop flow, removed 21 redundant places. [2024-06-27 16:34:39,218 INFO L231 Difference]: Finished difference. Result has 373 places, 379 transitions, 5639 flow [2024-06-27 16:34:39,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=4785, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5639, PETRI_PLACES=373, PETRI_TRANSITIONS=379} [2024-06-27 16:34:39,219 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 351 predicate places. [2024-06-27 16:34:39,219 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 379 transitions, 5639 flow [2024-06-27 16:34:39,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.696969696969697) internal successors, (155), 33 states have internal predecessors, (155), 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 16:34:39,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:34:39,219 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:34:39,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2024-06-27 16:34:39,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:34:39,431 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:34:39,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:34:39,432 INFO L85 PathProgramCache]: Analyzing trace with hash 361815989, now seen corresponding path program 67 times [2024-06-27 16:34:39,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:34:39,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047618213] [2024-06-27 16:34:39,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:34:39,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:34:39,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:34:40,018 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:34:40,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:34:40,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047618213] [2024-06-27 16:34:40,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047618213] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:34:40,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92547914] [2024-06-27 16:34:40,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:34:40,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:34:40,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:34:40,020 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:34:40,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2024-06-27 16:34:40,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:34:40,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 16:34:40,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:34:40,400 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:34:40,401 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 35 treesize of output 23 [2024-06-27 16:34:40,452 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:40,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:34:40,693 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-06-27 16:34:40,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-06-27 16:34:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:40,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92547914] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:34:40,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:34:40,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 33 [2024-06-27 16:34:40,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115471552] [2024-06-27 16:34:40,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:34:40,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 16:34:40,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:34:40,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 16:34:40,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 16:34:40,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:34:40,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 379 transitions, 5639 flow. Second operand has 33 states, 33 states have (on average 4.636363636363637) internal successors, (153), 33 states have internal predecessors, (153), 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 16:34:40,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:34:40,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:34:40,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:34:42,018 INFO L124 PetriNetUnfolderBase]: 1329/2495 cut-off events. [2024-06-27 16:34:42,018 INFO L125 PetriNetUnfolderBase]: For 88921/88921 co-relation queries the response was YES. [2024-06-27 16:34:42,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23598 conditions, 2495 events. 1329/2495 cut-off events. For 88921/88921 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 15805 event pairs, 395 based on Foata normal form. 3/2494 useless extension candidates. Maximal degree in co-relation 23477. Up to 2223 conditions per place. [2024-06-27 16:34:42,050 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 358 selfloop transitions, 63 changer transitions 3/425 dead transitions. [2024-06-27 16:34:42,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 425 transitions, 7351 flow [2024-06-27 16:34:42,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 16:34:42,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 16:34:42,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 159 transitions. [2024-06-27 16:34:42,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3285123966942149 [2024-06-27 16:34:42,051 INFO L175 Difference]: Start difference. First operand has 373 places, 379 transitions, 5639 flow. Second operand 22 states and 159 transitions. [2024-06-27 16:34:42,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 425 transitions, 7351 flow [2024-06-27 16:34:42,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 425 transitions, 6961 flow, removed 133 selfloop flow, removed 13 redundant places. [2024-06-27 16:34:42,426 INFO L231 Difference]: Finished difference. Result has 385 places, 387 transitions, 5741 flow [2024-06-27 16:34:42,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=5291, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5741, PETRI_PLACES=385, PETRI_TRANSITIONS=387} [2024-06-27 16:34:42,427 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 363 predicate places. [2024-06-27 16:34:42,427 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 387 transitions, 5741 flow [2024-06-27 16:34:42,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.636363636363637) internal successors, (153), 33 states have internal predecessors, (153), 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 16:34:42,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:34:42,428 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:34:42,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2024-06-27 16:34:42,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:34:42,639 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:34:42,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:34:42,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1872291505, now seen corresponding path program 68 times [2024-06-27 16:34:42,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:34:42,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433111616] [2024-06-27 16:34:42,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:34:42,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:34:42,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:34:43,178 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:34:43,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:34:43,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433111616] [2024-06-27 16:34:43,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433111616] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:34:43,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778533205] [2024-06-27 16:34:43,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:34:43,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:34:43,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:34:43,180 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:34:43,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2024-06-27 16:34:43,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:34:43,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:34:43,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 41 conjunts are in the unsatisfiable core [2024-06-27 16:34:43,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:34:43,563 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:34:43,563 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 27 treesize of output 19 [2024-06-27 16:34:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:34:43,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:34:43,915 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-06-27 16:34:43,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-06-27 16:34:44,022 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:44,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778533205] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:34:44,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:34:44,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 10] total 32 [2024-06-27 16:34:44,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181206344] [2024-06-27 16:34:44,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:34:44,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-06-27 16:34:44,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:34:44,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-06-27 16:34:44,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2024-06-27 16:34:44,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:34:44,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 387 transitions, 5741 flow. Second operand has 32 states, 32 states have (on average 4.71875) internal successors, (151), 32 states have internal predecessors, (151), 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 16:34:44,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:34:44,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:34:44,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:34:45,353 INFO L124 PetriNetUnfolderBase]: 1333/2504 cut-off events. [2024-06-27 16:34:45,353 INFO L125 PetriNetUnfolderBase]: For 76107/76107 co-relation queries the response was YES. [2024-06-27 16:34:45,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22651 conditions, 2504 events. 1333/2504 cut-off events. For 76107/76107 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 15924 event pairs, 405 based on Foata normal form. 2/2502 useless extension candidates. Maximal degree in co-relation 22526. Up to 2220 conditions per place. [2024-06-27 16:34:45,380 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 353 selfloop transitions, 70 changer transitions 4/428 dead transitions. [2024-06-27 16:34:45,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 428 transitions, 7119 flow [2024-06-27 16:34:45,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-06-27 16:34:45,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-06-27 16:34:45,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 168 transitions. [2024-06-27 16:34:45,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-06-27 16:34:45,382 INFO L175 Difference]: Start difference. First operand has 385 places, 387 transitions, 5741 flow. Second operand 24 states and 168 transitions. [2024-06-27 16:34:45,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 428 transitions, 7119 flow [2024-06-27 16:34:45,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 428 transitions, 6888 flow, removed 73 selfloop flow, removed 16 redundant places. [2024-06-27 16:34:45,704 INFO L231 Difference]: Finished difference. Result has 395 places, 391 transitions, 5808 flow [2024-06-27 16:34:45,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=5510, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5808, PETRI_PLACES=395, PETRI_TRANSITIONS=391} [2024-06-27 16:34:45,704 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 373 predicate places. [2024-06-27 16:34:45,704 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 391 transitions, 5808 flow [2024-06-27 16:34:45,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.71875) internal successors, (151), 32 states have internal predecessors, (151), 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 16:34:45,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:34:45,705 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:34:45,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2024-06-27 16:34:45,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2024-06-27 16:34:45,915 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:34:45,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:34:45,915 INFO L85 PathProgramCache]: Analyzing trace with hash -102787136, now seen corresponding path program 69 times [2024-06-27 16:34:45,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:34:45,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556426353] [2024-06-27 16:34:45,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:34:45,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:34:45,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:34:46,409 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:34:46,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:34:46,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556426353] [2024-06-27 16:34:46,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556426353] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:34:46,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956332411] [2024-06-27 16:34:46,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:34:46,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:34:46,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:34:46,411 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:34:46,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2024-06-27 16:34:46,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:34:46,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:34:46,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:34:46,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:34:46,872 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:46,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:34:46,989 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-06-27 16:34:46,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-06-27 16:34:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:47,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956332411] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:34:47,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:34:47,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 28 [2024-06-27 16:34:47,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106194911] [2024-06-27 16:34:47,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:34:47,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-06-27 16:34:47,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:34:47,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-06-27 16:34:47,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2024-06-27 16:34:47,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:34:47,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 391 transitions, 5808 flow. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 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 16:34:47,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:34:47,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:34:47,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:34:48,005 INFO L124 PetriNetUnfolderBase]: 1368/2564 cut-off events. [2024-06-27 16:34:48,005 INFO L125 PetriNetUnfolderBase]: For 78408/78408 co-relation queries the response was YES. [2024-06-27 16:34:48,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23276 conditions, 2564 events. 1368/2564 cut-off events. For 78408/78408 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 16357 event pairs, 205 based on Foata normal form. 5/2565 useless extension candidates. Maximal degree in co-relation 23148. Up to 1141 conditions per place. [2024-06-27 16:34:48,036 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 281 selfloop transitions, 157 changer transitions 0/439 dead transitions. [2024-06-27 16:34:48,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 439 transitions, 7560 flow [2024-06-27 16:34:48,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-27 16:34:48,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-27 16:34:48,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 129 transitions. [2024-06-27 16:34:48,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32575757575757575 [2024-06-27 16:34:48,037 INFO L175 Difference]: Start difference. First operand has 395 places, 391 transitions, 5808 flow. Second operand 18 states and 129 transitions. [2024-06-27 16:34:48,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 439 transitions, 7560 flow [2024-06-27 16:34:48,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 439 transitions, 7317 flow, removed 56 selfloop flow, removed 21 redundant places. [2024-06-27 16:34:48,421 INFO L231 Difference]: Finished difference. Result has 394 places, 396 transitions, 6030 flow [2024-06-27 16:34:48,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=5569, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6030, PETRI_PLACES=394, PETRI_TRANSITIONS=396} [2024-06-27 16:34:48,422 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 372 predicate places. [2024-06-27 16:34:48,422 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 396 transitions, 6030 flow [2024-06-27 16:34:48,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 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 16:34:48,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:34:48,423 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:34:48,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2024-06-27 16:34:48,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:34:48,635 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:34:48,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:34:48,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1150109311, now seen corresponding path program 70 times [2024-06-27 16:34:48,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:34:48,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967773449] [2024-06-27 16:34:48,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:34:48,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:34:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:34:49,167 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:34:49,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:34:49,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967773449] [2024-06-27 16:34:49,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967773449] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:34:49,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282060624] [2024-06-27 16:34:49,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:34:49,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:34:49,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:34:49,168 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:34:49,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2024-06-27 16:34:49,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:34:49,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:34:49,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:34:49,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:34:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:49,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:34:49,741 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-06-27 16:34:49,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-06-27 16:34:49,761 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:49,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282060624] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:34:49,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:34:49,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 28 [2024-06-27 16:34:49,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154372996] [2024-06-27 16:34:49,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:34:49,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-06-27 16:34:49,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:34:49,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-06-27 16:34:49,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2024-06-27 16:34:49,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:34:49,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 396 transitions, 6030 flow. Second operand has 28 states, 28 states have (on average 4.785714285714286) internal successors, (134), 28 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 16:34:49,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:34:49,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:34:49,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:34:50,826 INFO L124 PetriNetUnfolderBase]: 1373/2582 cut-off events. [2024-06-27 16:34:50,826 INFO L125 PetriNetUnfolderBase]: For 79993/79993 co-relation queries the response was YES. [2024-06-27 16:34:50,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23493 conditions, 2582 events. 1373/2582 cut-off events. For 79993/79993 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 16722 event pairs, 318 based on Foata normal form. 3/2581 useless extension candidates. Maximal degree in co-relation 23363. Up to 1253 conditions per place. [2024-06-27 16:34:50,859 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 292 selfloop transitions, 164 changer transitions 25/482 dead transitions. [2024-06-27 16:34:50,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 482 transitions, 8291 flow [2024-06-27 16:34:50,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 16:34:50,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 16:34:50,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 118 transitions. [2024-06-27 16:34:50,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3352272727272727 [2024-06-27 16:34:50,860 INFO L175 Difference]: Start difference. First operand has 394 places, 396 transitions, 6030 flow. Second operand 16 states and 118 transitions. [2024-06-27 16:34:50,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 482 transitions, 8291 flow [2024-06-27 16:34:51,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 482 transitions, 8010 flow, removed 16 selfloop flow, removed 14 redundant places. [2024-06-27 16:34:51,297 INFO L231 Difference]: Finished difference. Result has 400 places, 399 transitions, 6258 flow [2024-06-27 16:34:51,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=5753, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6258, PETRI_PLACES=400, PETRI_TRANSITIONS=399} [2024-06-27 16:34:51,297 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 378 predicate places. [2024-06-27 16:34:51,297 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 399 transitions, 6258 flow [2024-06-27 16:34:51,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.785714285714286) internal successors, (134), 28 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 16:34:51,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:34:51,298 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:34:51,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2024-06-27 16:34:51,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:34:51,510 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:34:51,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:34:51,511 INFO L85 PathProgramCache]: Analyzing trace with hash -473471786, now seen corresponding path program 71 times [2024-06-27 16:34:51,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:34:51,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080507641] [2024-06-27 16:34:51,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:34:51,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:34:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:34:52,051 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:34:52,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:34:52,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080507641] [2024-06-27 16:34:52,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080507641] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:34:52,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118162448] [2024-06-27 16:34:52,052 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:34:52,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:34:52,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:34:52,053 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:34:52,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2024-06-27 16:34:52,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:34:52,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:34:52,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 43 conjunts are in the unsatisfiable core [2024-06-27 16:34:52,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:34:52,636 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-06-27 16:34:52,636 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 29 treesize of output 9 [2024-06-27 16:34:52,640 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-06-27 16:34:52,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:34:52,792 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-06-27 16:34:52,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-06-27 16:34:52,829 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:52,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118162448] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:34:52,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:34:52,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 9] total 35 [2024-06-27 16:34:52,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412355143] [2024-06-27 16:34:52,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:34:52,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-06-27 16:34:52,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:34:52,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-06-27 16:34:52,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2024-06-27 16:34:52,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:34:52,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 399 transitions, 6258 flow. Second operand has 35 states, 35 states have (on average 4.857142857142857) internal successors, (170), 35 states have internal predecessors, (170), 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 16:34:52,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:34:52,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:34:52,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:34:53,953 INFO L124 PetriNetUnfolderBase]: 1379/2585 cut-off events. [2024-06-27 16:34:53,954 INFO L125 PetriNetUnfolderBase]: For 81680/81680 co-relation queries the response was YES. [2024-06-27 16:34:53,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24332 conditions, 2585 events. 1379/2585 cut-off events. For 81680/81680 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 16521 event pairs, 199 based on Foata normal form. 5/2586 useless extension candidates. Maximal degree in co-relation 24198. Up to 1149 conditions per place. [2024-06-27 16:34:53,988 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 284 selfloop transitions, 162 changer transitions 0/447 dead transitions. [2024-06-27 16:34:53,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 447 transitions, 8008 flow [2024-06-27 16:34:53,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-27 16:34:53,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-27 16:34:53,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 145 transitions. [2024-06-27 16:34:53,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32954545454545453 [2024-06-27 16:34:53,989 INFO L175 Difference]: Start difference. First operand has 400 places, 399 transitions, 6258 flow. Second operand 20 states and 145 transitions. [2024-06-27 16:34:53,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 447 transitions, 8008 flow [2024-06-27 16:34:54,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 447 transitions, 7617 flow, removed 98 selfloop flow, removed 13 redundant places. [2024-06-27 16:34:54,423 INFO L231 Difference]: Finished difference. Result has 404 places, 401 transitions, 6288 flow [2024-06-27 16:34:54,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=5887, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6288, PETRI_PLACES=404, PETRI_TRANSITIONS=401} [2024-06-27 16:34:54,424 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 382 predicate places. [2024-06-27 16:34:54,424 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 401 transitions, 6288 flow [2024-06-27 16:34:54,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.857142857142857) internal successors, (170), 35 states have internal predecessors, (170), 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 16:34:54,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:34:54,424 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:34:54,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2024-06-27 16:34:54,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2024-06-27 16:34:54,637 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:34:54,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:34:54,637 INFO L85 PathProgramCache]: Analyzing trace with hash -44512031, now seen corresponding path program 72 times [2024-06-27 16:34:54,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:34:54,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676860141] [2024-06-27 16:34:54,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:34:54,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:34:54,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:34:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:34:55,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:34:55,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676860141] [2024-06-27 16:34:55,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676860141] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:34:55,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219424875] [2024-06-27 16:34:55,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:34:55,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:34:55,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:34:55,233 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:34:55,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2024-06-27 16:34:55,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:34:55,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:34:55,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:34:55,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:34:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:55,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:34:55,938 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-06-27 16:34:55,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-06-27 16:34:55,978 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:55,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219424875] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:34:55,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:34:55,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 30 [2024-06-27 16:34:55,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895752859] [2024-06-27 16:34:55,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:34:55,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:34:55,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:34:55,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:34:55,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:34:55,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:34:55,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 401 transitions, 6288 flow. Second operand has 30 states, 30 states have (on average 4.766666666666667) internal successors, (143), 30 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 16:34:55,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:34:55,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:34:55,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:34:57,146 INFO L124 PetriNetUnfolderBase]: 1382/2598 cut-off events. [2024-06-27 16:34:57,147 INFO L125 PetriNetUnfolderBase]: For 80969/80969 co-relation queries the response was YES. [2024-06-27 16:34:57,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23969 conditions, 2598 events. 1382/2598 cut-off events. For 80969/80969 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 16709 event pairs, 403 based on Foata normal form. 3/2597 useless extension candidates. Maximal degree in co-relation 23837. Up to 1277 conditions per place. [2024-06-27 16:34:57,182 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 274 selfloop transitions, 152 changer transitions 8/435 dead transitions. [2024-06-27 16:34:57,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 435 transitions, 7657 flow [2024-06-27 16:34:57,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 16:34:57,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 16:34:57,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 119 transitions. [2024-06-27 16:34:57,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3380681818181818 [2024-06-27 16:34:57,183 INFO L175 Difference]: Start difference. First operand has 404 places, 401 transitions, 6288 flow. Second operand 16 states and 119 transitions. [2024-06-27 16:34:57,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 435 transitions, 7657 flow [2024-06-27 16:34:57,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 435 transitions, 7362 flow, removed 17 selfloop flow, removed 17 redundant places. [2024-06-27 16:34:57,619 INFO L231 Difference]: Finished difference. Result has 404 places, 401 transitions, 6304 flow [2024-06-27 16:34:57,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=5993, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6304, PETRI_PLACES=404, PETRI_TRANSITIONS=401} [2024-06-27 16:34:57,619 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 382 predicate places. [2024-06-27 16:34:57,620 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 401 transitions, 6304 flow [2024-06-27 16:34:57,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.766666666666667) internal successors, (143), 30 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 16:34:57,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:34:57,620 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:34:57,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2024-06-27 16:34:57,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:34:57,832 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:34:57,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:34:57,832 INFO L85 PathProgramCache]: Analyzing trace with hash 805335180, now seen corresponding path program 73 times [2024-06-27 16:34:57,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:34:57,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101220348] [2024-06-27 16:34:57,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:34:57,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:34:57,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:34:58,377 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:34:58,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:34:58,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101220348] [2024-06-27 16:34:58,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101220348] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:34:58,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373081339] [2024-06-27 16:34:58,378 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:34:58,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:34:58,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:34:58,379 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:34:58,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2024-06-27 16:34:58,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:34:58,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 16:34:58,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:34:58,820 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:58,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:34:58,966 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-06-27 16:34:58,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-06-27 16:34:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:34:58,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373081339] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:34:58,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:34:58,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-06-27 16:34:58,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043639822] [2024-06-27 16:34:58,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:34:58,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:34:58,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:34:58,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:34:58,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:34:58,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:34:58,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 401 transitions, 6304 flow. Second operand has 29 states, 29 states have (on average 4.827586206896552) internal successors, (140), 29 states have internal predecessors, (140), 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 16:34:58,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:34:58,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:34:58,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:00,270 INFO L124 PetriNetUnfolderBase]: 1405/2631 cut-off events. [2024-06-27 16:35:00,270 INFO L125 PetriNetUnfolderBase]: For 83799/83799 co-relation queries the response was YES. [2024-06-27 16:35:00,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24616 conditions, 2631 events. 1405/2631 cut-off events. For 83799/83799 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 16919 event pairs, 190 based on Foata normal form. 5/2632 useless extension candidates. Maximal degree in co-relation 24483. Up to 1155 conditions per place. [2024-06-27 16:35:00,308 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 288 selfloop transitions, 168 changer transitions 0/457 dead transitions. [2024-06-27 16:35:00,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 457 transitions, 8159 flow [2024-06-27 16:35:00,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 16:35:00,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 16:35:00,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 160 transitions. [2024-06-27 16:35:00,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3305785123966942 [2024-06-27 16:35:00,309 INFO L175 Difference]: Start difference. First operand has 404 places, 401 transitions, 6304 flow. Second operand 22 states and 160 transitions. [2024-06-27 16:35:00,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 457 transitions, 8159 flow [2024-06-27 16:35:00,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 457 transitions, 7853 flow, removed 1 selfloop flow, removed 14 redundant places. [2024-06-27 16:35:00,778 INFO L231 Difference]: Finished difference. Result has 411 places, 406 transitions, 6480 flow [2024-06-27 16:35:00,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=5998, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=6480, PETRI_PLACES=411, PETRI_TRANSITIONS=406} [2024-06-27 16:35:00,779 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 389 predicate places. [2024-06-27 16:35:00,779 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 406 transitions, 6480 flow [2024-06-27 16:35:00,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.827586206896552) internal successors, (140), 29 states have internal predecessors, (140), 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 16:35:00,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:00,779 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:00,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2024-06-27 16:35:00,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:00,985 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:35:00,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:00,985 INFO L85 PathProgramCache]: Analyzing trace with hash 807821393, now seen corresponding path program 74 times [2024-06-27 16:35:00,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:00,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864178329] [2024-06-27 16:35:00,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:00,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:01,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:01,640 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:35:01,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:01,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864178329] [2024-06-27 16:35:01,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864178329] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:01,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334779878] [2024-06-27 16:35:01,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:35:01,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:01,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:01,643 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:35:01,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2024-06-27 16:35:01,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:35:01,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:35:01,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 41 conjunts are in the unsatisfiable core [2024-06-27 16:35:01,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:02,173 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:35:02,174 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 65 treesize of output 41 [2024-06-27 16:35:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:35:02,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:02,372 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-06-27 16:35:02,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-06-27 16:35:02,415 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:35:02,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334779878] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:02,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:02,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 31 [2024-06-27 16:35:02,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104920665] [2024-06-27 16:35:02,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:02,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-27 16:35:02,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:02,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-27 16:35:02,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2024-06-27 16:35:02,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:35:02,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 406 transitions, 6480 flow. Second operand has 31 states, 31 states have (on average 4.741935483870968) internal successors, (147), 31 states have internal predecessors, (147), 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 16:35:02,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:02,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:35:02,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:03,909 INFO L124 PetriNetUnfolderBase]: 1421/2676 cut-off events. [2024-06-27 16:35:03,910 INFO L125 PetriNetUnfolderBase]: For 91144/91144 co-relation queries the response was YES. [2024-06-27 16:35:03,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25370 conditions, 2676 events. 1421/2676 cut-off events. For 91144/91144 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 17409 event pairs, 414 based on Foata normal form. 6/2678 useless extension candidates. Maximal degree in co-relation 25236. Up to 1329 conditions per place. [2024-06-27 16:35:03,940 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 291 selfloop transitions, 155 changer transitions 6/453 dead transitions. [2024-06-27 16:35:03,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 453 transitions, 8243 flow [2024-06-27 16:35:03,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-27 16:35:03,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-27 16:35:03,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 142 transitions. [2024-06-27 16:35:03,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35858585858585856 [2024-06-27 16:35:03,942 INFO L175 Difference]: Start difference. First operand has 411 places, 406 transitions, 6480 flow. Second operand 18 states and 142 transitions. [2024-06-27 16:35:03,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 453 transitions, 8243 flow [2024-06-27 16:35:04,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 453 transitions, 7941 flow, removed 18 selfloop flow, removed 17 redundant places. [2024-06-27 16:35:04,424 INFO L231 Difference]: Finished difference. Result has 414 places, 408 transitions, 6569 flow [2024-06-27 16:35:04,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6179, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6569, PETRI_PLACES=414, PETRI_TRANSITIONS=408} [2024-06-27 16:35:04,425 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 392 predicate places. [2024-06-27 16:35:04,425 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 408 transitions, 6569 flow [2024-06-27 16:35:04,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.741935483870968) internal successors, (147), 31 states have internal predecessors, (147), 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 16:35:04,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:04,425 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:04,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2024-06-27 16:35:04,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:04,638 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:35:04,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:04,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1091526584, now seen corresponding path program 75 times [2024-06-27 16:35:04,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:04,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938536809] [2024-06-27 16:35:04,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:04,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:35:05,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:05,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938536809] [2024-06-27 16:35:05,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938536809] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:05,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564193453] [2024-06-27 16:35:05,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:35:05,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:05,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:05,207 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:35:05,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2024-06-27 16:35:05,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-06-27 16:35:05,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:35:05,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 43 conjunts are in the unsatisfiable core [2024-06-27 16:35:05,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:05,708 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:35:05,709 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 46 treesize of output 30 [2024-06-27 16:35:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:35:05,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:05,912 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-06-27 16:35:05,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-06-27 16:35:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:35:05,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564193453] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:05,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:05,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 30 [2024-06-27 16:35:05,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006443585] [2024-06-27 16:35:05,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:05,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:35:05,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:05,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:35:05,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:35:05,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:35:05,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 408 transitions, 6569 flow. Second operand has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 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 16:35:05,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:05,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:35:05,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:07,364 INFO L124 PetriNetUnfolderBase]: 1474/2770 cut-off events. [2024-06-27 16:35:07,365 INFO L125 PetriNetUnfolderBase]: For 95079/95079 co-relation queries the response was YES. [2024-06-27 16:35:07,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26814 conditions, 2770 events. 1474/2770 cut-off events. For 95079/95079 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 18052 event pairs, 197 based on Foata normal form. 5/2771 useless extension candidates. Maximal degree in co-relation 26677. Up to 1159 conditions per place. [2024-06-27 16:35:07,404 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 290 selfloop transitions, 182 changer transitions 2/475 dead transitions. [2024-06-27 16:35:07,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 475 transitions, 8731 flow [2024-06-27 16:35:07,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-06-27 16:35:07,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-06-27 16:35:07,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 176 transitions. [2024-06-27 16:35:07,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-27 16:35:07,405 INFO L175 Difference]: Start difference. First operand has 414 places, 408 transitions, 6569 flow. Second operand 24 states and 176 transitions. [2024-06-27 16:35:07,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 475 transitions, 8731 flow [2024-06-27 16:35:07,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 475 transitions, 8405 flow, removed 9 selfloop flow, removed 14 redundant places. [2024-06-27 16:35:07,982 INFO L231 Difference]: Finished difference. Result has 424 places, 417 transitions, 6886 flow [2024-06-27 16:35:07,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6243, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=6886, PETRI_PLACES=424, PETRI_TRANSITIONS=417} [2024-06-27 16:35:07,983 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 402 predicate places. [2024-06-27 16:35:07,983 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 417 transitions, 6886 flow [2024-06-27 16:35:07,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 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 16:35:07,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:07,983 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:07,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2024-06-27 16:35:08,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2024-06-27 16:35:08,196 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:35:08,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:08,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1736536605, now seen corresponding path program 76 times [2024-06-27 16:35:08,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:08,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414199590] [2024-06-27 16:35:08,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:08,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:08,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:08,789 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:35:08,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:08,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414199590] [2024-06-27 16:35:08,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414199590] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:08,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697443743] [2024-06-27 16:35:08,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:35:08,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:08,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:08,791 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:35:08,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2024-06-27 16:35:09,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:35:09,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:35:09,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 16:35:09,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:09,238 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:35:09,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:09,377 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-06-27 16:35:09,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-06-27 16:35:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:35:09,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697443743] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:09,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:09,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-06-27 16:35:09,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487750588] [2024-06-27 16:35:09,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:09,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:35:09,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:09,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:35:09,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:35:09,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:35:09,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 417 transitions, 6886 flow. Second operand has 29 states, 29 states have (on average 4.655172413793103) internal successors, (135), 29 states have internal predecessors, (135), 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 16:35:09,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:09,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:35:09,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:10,460 INFO L124 PetriNetUnfolderBase]: 1467/2754 cut-off events. [2024-06-27 16:35:10,461 INFO L125 PetriNetUnfolderBase]: For 96060/96060 co-relation queries the response was YES. [2024-06-27 16:35:10,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26946 conditions, 2754 events. 1467/2754 cut-off events. For 96060/96060 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 17938 event pairs, 437 based on Foata normal form. 3/2753 useless extension candidates. Maximal degree in co-relation 26807. Up to 1434 conditions per place. [2024-06-27 16:35:10,500 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 286 selfloop transitions, 152 changer transitions 11/450 dead transitions. [2024-06-27 16:35:10,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 450 transitions, 8309 flow [2024-06-27 16:35:10,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 16:35:10,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 16:35:10,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 116 transitions. [2024-06-27 16:35:10,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32954545454545453 [2024-06-27 16:35:10,501 INFO L175 Difference]: Start difference. First operand has 424 places, 417 transitions, 6886 flow. Second operand 16 states and 116 transitions. [2024-06-27 16:35:10,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 450 transitions, 8309 flow [2024-06-27 16:35:11,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 450 transitions, 7703 flow, removed 66 selfloop flow, removed 22 redundant places. [2024-06-27 16:35:11,054 INFO L231 Difference]: Finished difference. Result has 420 places, 417 transitions, 6599 flow [2024-06-27 16:35:11,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6286, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6599, PETRI_PLACES=420, PETRI_TRANSITIONS=417} [2024-06-27 16:35:11,055 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 398 predicate places. [2024-06-27 16:35:11,055 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 417 transitions, 6599 flow [2024-06-27 16:35:11,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.655172413793103) internal successors, (135), 29 states have internal predecessors, (135), 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 16:35:11,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:11,055 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:11,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2024-06-27 16:35:11,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:11,267 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:35:11,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:11,268 INFO L85 PathProgramCache]: Analyzing trace with hash 2016867916, now seen corresponding path program 77 times [2024-06-27 16:35:11,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:11,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132263289] [2024-06-27 16:35:11,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:11,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:11,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:11,803 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:35:11,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:11,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132263289] [2024-06-27 16:35:11,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132263289] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:11,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793367044] [2024-06-27 16:35:11,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:35:11,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:11,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:11,805 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:35:11,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2024-06-27 16:35:12,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:35:12,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:35:12,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 16:35:12,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:12,251 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:35:12,251 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 58 treesize of output 34 [2024-06-27 16:35:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:35:12,298 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:12,460 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-06-27 16:35:12,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-06-27 16:35:12,470 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:35:12,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793367044] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:12,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:12,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-06-27 16:35:12,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897226089] [2024-06-27 16:35:12,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:12,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:35:12,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:12,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:35:12,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:35:12,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:35:12,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 417 transitions, 6599 flow. Second operand has 29 states, 29 states have (on average 4.620689655172414) internal successors, (134), 29 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 16:35:12,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:12,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:35:12,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:13,712 INFO L124 PetriNetUnfolderBase]: 1456/2722 cut-off events. [2024-06-27 16:35:13,712 INFO L125 PetriNetUnfolderBase]: For 92599/92599 co-relation queries the response was YES. [2024-06-27 16:35:13,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25826 conditions, 2722 events. 1456/2722 cut-off events. For 92599/92599 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 17524 event pairs, 202 based on Foata normal form. 2/2720 useless extension candidates. Maximal degree in co-relation 25684. Up to 1159 conditions per place. [2024-06-27 16:35:13,750 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 277 selfloop transitions, 179 changer transitions 2/459 dead transitions. [2024-06-27 16:35:13,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 459 transitions, 8266 flow [2024-06-27 16:35:13,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 16:35:13,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 16:35:13,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 152 transitions. [2024-06-27 16:35:13,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3140495867768595 [2024-06-27 16:35:13,751 INFO L175 Difference]: Start difference. First operand has 420 places, 417 transitions, 6599 flow. Second operand 22 states and 152 transitions. [2024-06-27 16:35:13,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 459 transitions, 8266 flow [2024-06-27 16:35:14,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 459 transitions, 7955 flow, removed 4 selfloop flow, removed 15 redundant places. [2024-06-27 16:35:14,273 INFO L231 Difference]: Finished difference. Result has 422 places, 415 transitions, 6634 flow [2024-06-27 16:35:14,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6281, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=6634, PETRI_PLACES=422, PETRI_TRANSITIONS=415} [2024-06-27 16:35:14,274 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 400 predicate places. [2024-06-27 16:35:14,274 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 415 transitions, 6634 flow [2024-06-27 16:35:14,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.620689655172414) internal successors, (134), 29 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 16:35:14,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:14,274 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:14,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2024-06-27 16:35:14,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:14,487 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:35:14,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:14,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1935630623, now seen corresponding path program 78 times [2024-06-27 16:35:14,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:14,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419627939] [2024-06-27 16:35:14,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:14,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:14,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:35:15,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:15,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419627939] [2024-06-27 16:35:15,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419627939] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:15,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798849877] [2024-06-27 16:35:15,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:35:15,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:15,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:15,157 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:35:15,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2024-06-27 16:35:15,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 16:35:15,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:35:15,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:35:15,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:15,651 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:35:15,651 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 65 treesize of output 41 [2024-06-27 16:35:15,692 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:35:15,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:15,850 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-06-27 16:35:15,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-06-27 16:35:15,895 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:35:15,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798849877] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:15,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:15,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 30 [2024-06-27 16:35:15,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494433976] [2024-06-27 16:35:15,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:15,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:35:15,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:15,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:35:15,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:35:15,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:35:15,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 415 transitions, 6634 flow. Second operand has 30 states, 30 states have (on average 4.7) internal successors, (141), 30 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:15,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:15,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:35:15,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:17,159 INFO L124 PetriNetUnfolderBase]: 1450/2705 cut-off events. [2024-06-27 16:35:17,160 INFO L125 PetriNetUnfolderBase]: For 91967/91967 co-relation queries the response was YES. [2024-06-27 16:35:17,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25787 conditions, 2705 events. 1450/2705 cut-off events. For 91967/91967 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 17432 event pairs, 433 based on Foata normal form. 4/2705 useless extension candidates. Maximal degree in co-relation 25648. Up to 1423 conditions per place. [2024-06-27 16:35:17,193 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 287 selfloop transitions, 153 changer transitions 0/441 dead transitions. [2024-06-27 16:35:17,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 441 transitions, 8006 flow [2024-06-27 16:35:17,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 16:35:17,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 16:35:17,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 115 transitions. [2024-06-27 16:35:17,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32670454545454547 [2024-06-27 16:35:17,194 INFO L175 Difference]: Start difference. First operand has 422 places, 415 transitions, 6634 flow. Second operand 16 states and 115 transitions. [2024-06-27 16:35:17,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 441 transitions, 8006 flow [2024-06-27 16:35:17,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 441 transitions, 7642 flow, removed 3 selfloop flow, removed 21 redundant places. [2024-06-27 16:35:17,687 INFO L231 Difference]: Finished difference. Result has 413 places, 414 transitions, 6566 flow [2024-06-27 16:35:17,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6260, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6566, PETRI_PLACES=413, PETRI_TRANSITIONS=414} [2024-06-27 16:35:17,687 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 391 predicate places. [2024-06-27 16:35:17,687 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 414 transitions, 6566 flow [2024-06-27 16:35:17,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.7) internal successors, (141), 30 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:17,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:17,688 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:17,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2024-06-27 16:35:17,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2024-06-27 16:35:17,900 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:35:17,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:17,900 INFO L85 PathProgramCache]: Analyzing trace with hash -916370926, now seen corresponding path program 79 times [2024-06-27 16:35:17,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:17,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766233842] [2024-06-27 16:35:17,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:17,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:18,395 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:35:18,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:18,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766233842] [2024-06-27 16:35:18,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766233842] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:18,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555661628] [2024-06-27 16:35:18,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:35:18,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:18,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:18,397 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:35:18,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2024-06-27 16:35:18,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:18,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:35:18,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:18,846 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-06-27 16:35:18,846 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 33 treesize of output 9 [2024-06-27 16:35:18,850 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:35:18,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:18,993 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:35:18,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-06-27 16:35:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:35:19,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555661628] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:19,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:19,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 28 [2024-06-27 16:35:19,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453869441] [2024-06-27 16:35:19,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:19,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-06-27 16:35:19,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:19,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-06-27 16:35:19,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2024-06-27 16:35:19,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:35:19,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 414 transitions, 6566 flow. Second operand has 28 states, 28 states have (on average 4.857142857142857) internal successors, (136), 28 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:19,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:19,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:35:19,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:20,073 INFO L124 PetriNetUnfolderBase]: 1464/2729 cut-off events. [2024-06-27 16:35:20,073 INFO L125 PetriNetUnfolderBase]: For 93831/93831 co-relation queries the response was YES. [2024-06-27 16:35:20,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25958 conditions, 2729 events. 1464/2729 cut-off events. For 93831/93831 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 17589 event pairs, 596 based on Foata normal form. 5/2730 useless extension candidates. Maximal degree in co-relation 25820. Up to 2287 conditions per place. [2024-06-27 16:35:20,109 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 339 selfloop transitions, 101 changer transitions 0/441 dead transitions. [2024-06-27 16:35:20,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 441 transitions, 7849 flow [2024-06-27 16:35:20,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 16:35:20,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 16:35:20,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 114 transitions. [2024-06-27 16:35:20,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32386363636363635 [2024-06-27 16:35:20,111 INFO L175 Difference]: Start difference. First operand has 413 places, 414 transitions, 6566 flow. Second operand 16 states and 114 transitions. [2024-06-27 16:35:20,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 441 transitions, 7849 flow [2024-06-27 16:35:20,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 441 transitions, 7543 flow, removed 0 selfloop flow, removed 15 redundant places. [2024-06-27 16:35:20,661 INFO L231 Difference]: Finished difference. Result has 415 places, 416 transitions, 6545 flow [2024-06-27 16:35:20,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6260, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6545, PETRI_PLACES=415, PETRI_TRANSITIONS=416} [2024-06-27 16:35:20,662 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 393 predicate places. [2024-06-27 16:35:20,662 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 416 transitions, 6545 flow [2024-06-27 16:35:20,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.857142857142857) internal successors, (136), 28 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:20,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:20,662 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:20,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2024-06-27 16:35:20,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:20,875 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:35:20,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:20,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1751748497, now seen corresponding path program 80 times [2024-06-27 16:35:20,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:20,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660598671] [2024-06-27 16:35:20,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:20,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:20,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:21,507 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:35:21,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:21,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660598671] [2024-06-27 16:35:21,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660598671] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:21,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391698141] [2024-06-27 16:35:21,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:35:21,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:21,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:21,509 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:35:21,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2024-06-27 16:35:21,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:35:21,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:35:21,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 41 conjunts are in the unsatisfiable core [2024-06-27 16:35:21,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:22,000 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:35:22,001 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 65 treesize of output 41 [2024-06-27 16:35:22,034 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:35:22,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:22,169 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:35:22,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-06-27 16:35:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:35:22,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391698141] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:22,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:22,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 30 [2024-06-27 16:35:22,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237688547] [2024-06-27 16:35:22,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:22,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:35:22,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:22,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:35:22,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:35:22,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:35:22,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 416 transitions, 6545 flow. Second operand has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 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 16:35:22,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:22,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:35:22,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:23,432 INFO L124 PetriNetUnfolderBase]: 1474/2752 cut-off events. [2024-06-27 16:35:23,433 INFO L125 PetriNetUnfolderBase]: For 97921/97921 co-relation queries the response was YES. [2024-06-27 16:35:23,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26288 conditions, 2752 events. 1474/2752 cut-off events. For 97921/97921 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 17806 event pairs, 596 based on Foata normal form. 4/2752 useless extension candidates. Maximal degree in co-relation 26148. Up to 2292 conditions per place. [2024-06-27 16:35:23,482 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 334 selfloop transitions, 105 changer transitions 1/441 dead transitions. [2024-06-27 16:35:23,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 441 transitions, 7841 flow [2024-06-27 16:35:23,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 16:35:23,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 16:35:23,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 118 transitions. [2024-06-27 16:35:23,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3352272727272727 [2024-06-27 16:35:23,483 INFO L175 Difference]: Start difference. First operand has 415 places, 416 transitions, 6545 flow. Second operand 16 states and 118 transitions. [2024-06-27 16:35:23,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 441 transitions, 7841 flow [2024-06-27 16:35:24,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 441 transitions, 7579 flow, removed 24 selfloop flow, removed 16 redundant places. [2024-06-27 16:35:24,086 INFO L231 Difference]: Finished difference. Result has 415 places, 417 transitions, 6542 flow [2024-06-27 16:35:24,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6283, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6542, PETRI_PLACES=415, PETRI_TRANSITIONS=417} [2024-06-27 16:35:24,086 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 393 predicate places. [2024-06-27 16:35:24,086 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 417 transitions, 6542 flow [2024-06-27 16:35:24,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 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 16:35:24,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:24,087 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:24,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2024-06-27 16:35:24,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:24,293 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:35:24,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:24,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1153977823, now seen corresponding path program 81 times [2024-06-27 16:35:24,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:24,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551650022] [2024-06-27 16:35:24,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:24,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:24,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:24,852 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:35:24,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:24,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551650022] [2024-06-27 16:35:24,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551650022] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:24,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439680143] [2024-06-27 16:35:24,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:35:24,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:24,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:24,854 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:35:24,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2024-06-27 16:35:25,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:35:25,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:35:25,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:35:25,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:35:25,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:25,436 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:35:25,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-06-27 16:35:25,537 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:35:25,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439680143] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:25,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:25,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 29 [2024-06-27 16:35:25,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130653996] [2024-06-27 16:35:25,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:25,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:35:25,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:25,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:35:25,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:35:25,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:35:25,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 417 transitions, 6542 flow. Second operand has 29 states, 29 states have (on average 4.827586206896552) internal successors, (140), 29 states have internal predecessors, (140), 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 16:35:25,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:25,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:35:25,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:26,776 INFO L124 PetriNetUnfolderBase]: 1477/2785 cut-off events. [2024-06-27 16:35:26,776 INFO L125 PetriNetUnfolderBase]: For 102096/102096 co-relation queries the response was YES. [2024-06-27 16:35:26,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26559 conditions, 2785 events. 1477/2785 cut-off events. For 102096/102096 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 18327 event pairs, 574 based on Foata normal form. 9/2790 useless extension candidates. Maximal degree in co-relation 26421. Up to 2266 conditions per place. [2024-06-27 16:35:26,814 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 341 selfloop transitions, 117 changer transitions 19/478 dead transitions. [2024-06-27 16:35:26,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 478 transitions, 8554 flow [2024-06-27 16:35:26,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 16:35:26,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-27 16:35:26,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 184 transitions. [2024-06-27 16:35:26,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32167832167832167 [2024-06-27 16:35:26,815 INFO L175 Difference]: Start difference. First operand has 415 places, 417 transitions, 6542 flow. Second operand 26 states and 184 transitions. [2024-06-27 16:35:26,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 478 transitions, 8554 flow [2024-06-27 16:35:27,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 478 transitions, 8337 flow, removed 5 selfloop flow, removed 14 redundant places. [2024-06-27 16:35:27,350 INFO L231 Difference]: Finished difference. Result has 431 places, 422 transitions, 6714 flow [2024-06-27 16:35:27,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6325, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6714, PETRI_PLACES=431, PETRI_TRANSITIONS=422} [2024-06-27 16:35:27,351 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 409 predicate places. [2024-06-27 16:35:27,351 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 422 transitions, 6714 flow [2024-06-27 16:35:27,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.827586206896552) internal successors, (140), 29 states have internal predecessors, (140), 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 16:35:27,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:27,351 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:27,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2024-06-27 16:35:27,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2024-06-27 16:35:27,564 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:35:27,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:27,564 INFO L85 PathProgramCache]: Analyzing trace with hash -447259337, now seen corresponding path program 82 times [2024-06-27 16:35:27,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:27,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978134359] [2024-06-27 16:35:27,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:27,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:27,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:28,121 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:35:28,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:28,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978134359] [2024-06-27 16:35:28,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978134359] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:28,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494957345] [2024-06-27 16:35:28,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:35:28,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:28,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:28,123 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:35:28,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2024-06-27 16:35:28,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:35:28,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:35:28,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 16:35:28,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:35:28,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:28,602 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:35:28,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-06-27 16:35:28,643 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:35:28,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494957345] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:28,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:28,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-06-27 16:35:28,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381192152] [2024-06-27 16:35:28,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:28,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:35:28,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:28,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:35:28,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:35:28,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:35:28,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 422 transitions, 6714 flow. Second operand has 29 states, 29 states have (on average 4.689655172413793) internal successors, (136), 29 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:28,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:28,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:35:28,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:29,966 INFO L124 PetriNetUnfolderBase]: 1489/2791 cut-off events. [2024-06-27 16:35:29,967 INFO L125 PetriNetUnfolderBase]: For 109489/109489 co-relation queries the response was YES. [2024-06-27 16:35:29,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27496 conditions, 2791 events. 1489/2791 cut-off events. For 109489/109489 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 18165 event pairs, 580 based on Foata normal form. 8/2795 useless extension candidates. Maximal degree in co-relation 27353. Up to 2277 conditions per place. [2024-06-27 16:35:30,009 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 353 selfloop transitions, 119 changer transitions 4/477 dead transitions. [2024-06-27 16:35:30,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 477 transitions, 8750 flow [2024-06-27 16:35:30,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 16:35:30,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-27 16:35:30,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 188 transitions. [2024-06-27 16:35:30,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32867132867132864 [2024-06-27 16:35:30,011 INFO L175 Difference]: Start difference. First operand has 431 places, 422 transitions, 6714 flow. Second operand 26 states and 188 transitions. [2024-06-27 16:35:30,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 477 transitions, 8750 flow [2024-06-27 16:35:30,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 477 transitions, 8399 flow, removed 62 selfloop flow, removed 18 redundant places. [2024-06-27 16:35:30,694 INFO L231 Difference]: Finished difference. Result has 437 places, 425 transitions, 6742 flow [2024-06-27 16:35:30,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6363, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6742, PETRI_PLACES=437, PETRI_TRANSITIONS=425} [2024-06-27 16:35:30,695 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 415 predicate places. [2024-06-27 16:35:30,695 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 425 transitions, 6742 flow [2024-06-27 16:35:30,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.689655172413793) internal successors, (136), 29 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:35:30,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:30,695 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:30,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2024-06-27 16:35:30,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:30,902 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:35:30,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:30,902 INFO L85 PathProgramCache]: Analyzing trace with hash -733450741, now seen corresponding path program 83 times [2024-06-27 16:35:30,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:30,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811701607] [2024-06-27 16:35:30,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:30,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:30,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:31,454 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:35:31,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:31,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811701607] [2024-06-27 16:35:31,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811701607] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:31,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8028660] [2024-06-27 16:35:31,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:35:31,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:31,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:31,456 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:35:31,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2024-06-27 16:35:31,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:35:31,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:35:31,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 16:35:31,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:31,945 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:35:31,946 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 73 treesize of output 45 [2024-06-27 16:35:31,983 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:35:31,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:32,088 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:35:32,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-06-27 16:35:32,176 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:35:32,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8028660] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:32,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:32,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 9] total 33 [2024-06-27 16:35:32,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837143685] [2024-06-27 16:35:32,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:32,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 16:35:32,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:32,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 16:35:32,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 16:35:32,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:35:32,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 425 transitions, 6742 flow. Second operand has 33 states, 33 states have (on average 4.848484848484849) internal successors, (160), 33 states have internal predecessors, (160), 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 16:35:32,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:32,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:35:32,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:33,506 INFO L124 PetriNetUnfolderBase]: 1505/2833 cut-off events. [2024-06-27 16:35:33,506 INFO L125 PetriNetUnfolderBase]: For 116237/116237 co-relation queries the response was YES. [2024-06-27 16:35:33,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28113 conditions, 2833 events. 1505/2833 cut-off events. For 116237/116237 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 18608 event pairs, 555 based on Foata normal form. 12/2841 useless extension candidates. Maximal degree in co-relation 27969. Up to 2197 conditions per place. [2024-06-27 16:35:33,546 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 356 selfloop transitions, 127 changer transitions 10/494 dead transitions. [2024-06-27 16:35:33,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 494 transitions, 9106 flow [2024-06-27 16:35:33,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-06-27 16:35:33,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-06-27 16:35:33,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 207 transitions. [2024-06-27 16:35:33,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.336038961038961 [2024-06-27 16:35:33,547 INFO L175 Difference]: Start difference. First operand has 437 places, 425 transitions, 6742 flow. Second operand 28 states and 207 transitions. [2024-06-27 16:35:33,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 494 transitions, 9106 flow [2024-06-27 16:35:34,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 494 transitions, 8870 flow, removed 26 selfloop flow, removed 21 redundant places. [2024-06-27 16:35:34,115 INFO L231 Difference]: Finished difference. Result has 448 places, 429 transitions, 6947 flow [2024-06-27 16:35:34,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6506, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=6947, PETRI_PLACES=448, PETRI_TRANSITIONS=429} [2024-06-27 16:35:34,115 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 426 predicate places. [2024-06-27 16:35:34,115 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 429 transitions, 6947 flow [2024-06-27 16:35:34,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.848484848484849) internal successors, (160), 33 states have internal predecessors, (160), 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 16:35:34,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:34,116 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:34,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2024-06-27 16:35:34,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:34,328 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:35:34,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:34,329 INFO L85 PathProgramCache]: Analyzing trace with hash -734013394, now seen corresponding path program 84 times [2024-06-27 16:35:34,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:34,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027661935] [2024-06-27 16:35:34,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:34,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:34,857 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:35:34,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:34,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027661935] [2024-06-27 16:35:34,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027661935] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:34,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774039556] [2024-06-27 16:35:34,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:35:34,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:34,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:34,859 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:35:34,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2024-06-27 16:35:35,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 16:35:35,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:35:35,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:35:35,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:35,518 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:35:35,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:35,667 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:35:35,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-06-27 16:35:35,739 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:35:35,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774039556] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:35,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:35,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 29 [2024-06-27 16:35:35,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196349972] [2024-06-27 16:35:35,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:35,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:35:35,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:35,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:35:35,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:35:35,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:35:35,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 429 transitions, 6947 flow. Second operand has 29 states, 29 states have (on average 4.896551724137931) internal successors, (142), 29 states have internal predecessors, (142), 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 16:35:35,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:35,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:35:35,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:36,764 INFO L124 PetriNetUnfolderBase]: 1513/2840 cut-off events. [2024-06-27 16:35:36,764 INFO L125 PetriNetUnfolderBase]: For 124705/124705 co-relation queries the response was YES. [2024-06-27 16:35:36,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28899 conditions, 2840 events. 1513/2840 cut-off events. For 124705/124705 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 18569 event pairs, 602 based on Foata normal form. 5/2841 useless extension candidates. Maximal degree in co-relation 28751. Up to 2364 conditions per place. [2024-06-27 16:35:36,806 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 357 selfloop transitions, 107 changer transitions 0/465 dead transitions. [2024-06-27 16:35:36,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 465 transitions, 8402 flow [2024-06-27 16:35:36,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 16:35:36,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 16:35:36,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 138 transitions. [2024-06-27 16:35:36,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33014354066985646 [2024-06-27 16:35:36,808 INFO L175 Difference]: Start difference. First operand has 448 places, 429 transitions, 6947 flow. Second operand 19 states and 138 transitions. [2024-06-27 16:35:36,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 465 transitions, 8402 flow [2024-06-27 16:35:37,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 465 transitions, 8061 flow, removed 56 selfloop flow, removed 23 redundant places. [2024-06-27 16:35:37,487 INFO L231 Difference]: Finished difference. Result has 443 places, 431 transitions, 6914 flow [2024-06-27 16:35:37,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6618, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6914, PETRI_PLACES=443, PETRI_TRANSITIONS=431} [2024-06-27 16:35:37,488 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 421 predicate places. [2024-06-27 16:35:37,488 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 431 transitions, 6914 flow [2024-06-27 16:35:37,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.896551724137931) internal successors, (142), 29 states have internal predecessors, (142), 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 16:35:37,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:37,488 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:37,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2024-06-27 16:35:37,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:37,700 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:35:37,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:37,700 INFO L85 PathProgramCache]: Analyzing trace with hash -301644399, now seen corresponding path program 85 times [2024-06-27 16:35:37,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:37,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875640871] [2024-06-27 16:35:37,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:37,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:37,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:38,303 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:35:38,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:38,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875640871] [2024-06-27 16:35:38,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875640871] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:38,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454535914] [2024-06-27 16:35:38,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:35:38,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:38,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:38,306 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:35:38,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2024-06-27 16:35:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:38,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 16:35:38,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:38,736 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:35:38,737 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 81 treesize of output 45 [2024-06-27 16:35:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:35:38,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:38,881 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:35:38,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-06-27 16:35:38,940 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:35:38,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454535914] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:38,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:38,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-06-27 16:35:38,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189731933] [2024-06-27 16:35:38,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:38,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:35:38,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:38,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:35:38,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:35:38,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:35:38,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 431 transitions, 6914 flow. Second operand has 29 states, 29 states have (on average 4.758620689655173) internal successors, (138), 29 states have internal predecessors, (138), 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 16:35:38,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:38,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:35:38,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:40,515 INFO L124 PetriNetUnfolderBase]: 1513/2873 cut-off events. [2024-06-27 16:35:40,516 INFO L125 PetriNetUnfolderBase]: For 124231/124231 co-relation queries the response was YES. [2024-06-27 16:35:40,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28838 conditions, 2873 events. 1513/2873 cut-off events. For 124231/124231 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 18999 event pairs, 572 based on Foata normal form. 25/2894 useless extension candidates. Maximal degree in co-relation 28690. Up to 2237 conditions per place. [2024-06-27 16:35:40,559 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 371 selfloop transitions, 127 changer transitions 15/514 dead transitions. [2024-06-27 16:35:40,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 514 transitions, 9540 flow [2024-06-27 16:35:40,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-06-27 16:35:40,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-06-27 16:35:40,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 243 transitions. [2024-06-27 16:35:40,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3563049853372434 [2024-06-27 16:35:40,560 INFO L175 Difference]: Start difference. First operand has 443 places, 431 transitions, 6914 flow. Second operand 31 states and 243 transitions. [2024-06-27 16:35:40,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 514 transitions, 9540 flow [2024-06-27 16:35:41,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 514 transitions, 9220 flow, removed 37 selfloop flow, removed 20 redundant places. [2024-06-27 16:35:41,269 INFO L231 Difference]: Finished difference. Result has 458 places, 432 transitions, 7051 flow [2024-06-27 16:35:41,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6546, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=7051, PETRI_PLACES=458, PETRI_TRANSITIONS=432} [2024-06-27 16:35:41,270 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 436 predicate places. [2024-06-27 16:35:41,270 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 432 transitions, 7051 flow [2024-06-27 16:35:41,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.758620689655173) internal successors, (138), 29 states have internal predecessors, (138), 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 16:35:41,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:41,271 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:41,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2024-06-27 16:35:41,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2024-06-27 16:35:41,483 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:35:41,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:41,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1848915154, now seen corresponding path program 86 times [2024-06-27 16:35:41,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:41,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447482259] [2024-06-27 16:35:41,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:41,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:42,116 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:35:42,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:42,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447482259] [2024-06-27 16:35:42,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447482259] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:42,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593194567] [2024-06-27 16:35:42,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:35:42,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:42,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:42,117 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:35:42,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2024-06-27 16:35:42,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:35:42,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:35:42,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 43 conjunts are in the unsatisfiable core [2024-06-27 16:35:42,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:42,633 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:35:42,633 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 46 treesize of output 30 [2024-06-27 16:35:42,674 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:35:42,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:42,762 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:35:42,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-06-27 16:35:42,826 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:35:42,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593194567] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:42,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:42,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 29 [2024-06-27 16:35:42,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834861397] [2024-06-27 16:35:42,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:42,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:35:42,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:42,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:35:42,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:35:42,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:35:42,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 432 transitions, 7051 flow. Second operand has 29 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 states have internal predecessors, (139), 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 16:35:42,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:42,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:35:42,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:44,268 INFO L124 PetriNetUnfolderBase]: 1515/2880 cut-off events. [2024-06-27 16:35:44,269 INFO L125 PetriNetUnfolderBase]: For 139648/139648 co-relation queries the response was YES. [2024-06-27 16:35:44,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29893 conditions, 2880 events. 1515/2880 cut-off events. For 139648/139648 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 19015 event pairs, 605 based on Foata normal form. 10/2886 useless extension candidates. Maximal degree in co-relation 29740. Up to 2351 conditions per place. [2024-06-27 16:35:44,317 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 348 selfloop transitions, 124 changer transitions 3/476 dead transitions. [2024-06-27 16:35:44,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 476 transitions, 8858 flow [2024-06-27 16:35:44,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-06-27 16:35:44,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-06-27 16:35:44,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 174 transitions. [2024-06-27 16:35:44,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32954545454545453 [2024-06-27 16:35:44,318 INFO L175 Difference]: Start difference. First operand has 458 places, 432 transitions, 7051 flow. Second operand 24 states and 174 transitions. [2024-06-27 16:35:44,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 476 transitions, 8858 flow [2024-06-27 16:35:45,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 476 transitions, 8414 flow, removed 105 selfloop flow, removed 22 redundant places. [2024-06-27 16:35:45,083 INFO L231 Difference]: Finished difference. Result has 459 places, 434 transitions, 7014 flow [2024-06-27 16:35:45,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6639, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=7014, PETRI_PLACES=459, PETRI_TRANSITIONS=434} [2024-06-27 16:35:45,084 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 437 predicate places. [2024-06-27 16:35:45,084 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 434 transitions, 7014 flow [2024-06-27 16:35:45,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 states have internal predecessors, (139), 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 16:35:45,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:45,085 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:45,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2024-06-27 16:35:45,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:45,298 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:35:45,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:45,298 INFO L85 PathProgramCache]: Analyzing trace with hash -916014098, now seen corresponding path program 87 times [2024-06-27 16:35:45,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:45,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126568693] [2024-06-27 16:35:45,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:45,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:45,844 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:35:45,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:45,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126568693] [2024-06-27 16:35:45,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126568693] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:45,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193760488] [2024-06-27 16:35:45,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:35:45,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:45,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:45,846 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:35:45,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2024-06-27 16:35:46,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-06-27 16:35:46,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:35:46,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 50 conjunts are in the unsatisfiable core [2024-06-27 16:35:46,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:46,427 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:35:46,427 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 46 treesize of output 30 [2024-06-27 16:35:46,518 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:35:46,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:46,798 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:35:46,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-06-27 16:35:46,875 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:35:46,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193760488] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:46,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:46,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 11] total 33 [2024-06-27 16:35:46,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913495714] [2024-06-27 16:35:46,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:46,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 16:35:46,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:46,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 16:35:46,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 16:35:46,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:35:46,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 434 transitions, 7014 flow. Second operand has 33 states, 33 states have (on average 4.7272727272727275) internal successors, (156), 33 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 16:35:46,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:46,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:35:46,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:49,244 INFO L124 PetriNetUnfolderBase]: 1585/3038 cut-off events. [2024-06-27 16:35:49,244 INFO L125 PetriNetUnfolderBase]: For 153084/153084 co-relation queries the response was YES. [2024-06-27 16:35:49,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32070 conditions, 3038 events. 1585/3038 cut-off events. For 153084/153084 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 20392 event pairs, 237 based on Foata normal form. 14/3048 useless extension candidates. Maximal degree in co-relation 31917. Up to 2380 conditions per place. [2024-06-27 16:35:49,290 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 392 selfloop transitions, 140 changer transitions 5/538 dead transitions. [2024-06-27 16:35:49,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 538 transitions, 10088 flow [2024-06-27 16:35:49,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-06-27 16:35:49,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-06-27 16:35:49,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 273 transitions. [2024-06-27 16:35:49,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.326555023923445 [2024-06-27 16:35:49,292 INFO L175 Difference]: Start difference. First operand has 459 places, 434 transitions, 7014 flow. Second operand 38 states and 273 transitions. [2024-06-27 16:35:49,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 538 transitions, 10088 flow [2024-06-27 16:35:50,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 538 transitions, 9778 flow, removed 36 selfloop flow, removed 21 redundant places. [2024-06-27 16:35:50,094 INFO L231 Difference]: Finished difference. Result has 487 places, 458 transitions, 8030 flow [2024-06-27 16:35:50,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6704, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=8030, PETRI_PLACES=487, PETRI_TRANSITIONS=458} [2024-06-27 16:35:50,094 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 465 predicate places. [2024-06-27 16:35:50,094 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 458 transitions, 8030 flow [2024-06-27 16:35:50,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.7272727272727275) internal successors, (156), 33 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 16:35:50,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:50,095 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:50,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2024-06-27 16:35:50,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:50,308 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:35:50,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:50,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1506304850, now seen corresponding path program 88 times [2024-06-27 16:35:50,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:50,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029539478] [2024-06-27 16:35:50,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:50,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:50,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:50,844 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:35:50,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:50,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029539478] [2024-06-27 16:35:50,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029539478] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:50,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745213260] [2024-06-27 16:35:50,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:35:50,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:50,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:50,845 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:35:50,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2024-06-27 16:35:51,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:35:51,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:35:51,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 16:35:51,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:51,347 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:35:51,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:51,449 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:35:51,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-06-27 16:35:51,505 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:35:51,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745213260] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:51,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:51,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-06-27 16:35:51,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110520843] [2024-06-27 16:35:51,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:51,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:35:51,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:51,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:35:51,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:35:51,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:35:51,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 458 transitions, 8030 flow. Second operand has 29 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 states have internal predecessors, (139), 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 16:35:51,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:51,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:35:51,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:52,839 INFO L124 PetriNetUnfolderBase]: 1602/3060 cut-off events. [2024-06-27 16:35:52,839 INFO L125 PetriNetUnfolderBase]: For 185595/185595 co-relation queries the response was YES. [2024-06-27 16:35:52,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34260 conditions, 3060 events. 1602/3060 cut-off events. For 185595/185595 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 20596 event pairs, 627 based on Foata normal form. 18/3074 useless extension candidates. Maximal degree in co-relation 34095. Up to 2471 conditions per place. [2024-06-27 16:35:52,889 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 379 selfloop transitions, 125 changer transitions 0/505 dead transitions. [2024-06-27 16:35:52,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 505 transitions, 10096 flow [2024-06-27 16:35:52,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 16:35:52,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 16:35:52,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 167 transitions. [2024-06-27 16:35:52,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3300395256916996 [2024-06-27 16:35:52,891 INFO L175 Difference]: Start difference. First operand has 487 places, 458 transitions, 8030 flow. Second operand 23 states and 167 transitions. [2024-06-27 16:35:52,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 505 transitions, 10096 flow [2024-06-27 16:35:53,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 505 transitions, 9117 flow, removed 402 selfloop flow, removed 19 redundant places. [2024-06-27 16:35:53,887 INFO L231 Difference]: Finished difference. Result has 491 places, 461 transitions, 7505 flow [2024-06-27 16:35:53,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=7055, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7505, PETRI_PLACES=491, PETRI_TRANSITIONS=461} [2024-06-27 16:35:53,888 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 469 predicate places. [2024-06-27 16:35:53,888 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 461 transitions, 7505 flow [2024-06-27 16:35:53,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 states have internal predecessors, (139), 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 16:35:53,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:53,888 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:53,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2024-06-27 16:35:54,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:54,101 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:35:54,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:54,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2008853782, now seen corresponding path program 89 times [2024-06-27 16:35:54,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:54,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254485152] [2024-06-27 16:35:54,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:54,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:54,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:54,691 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:35:54,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:54,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254485152] [2024-06-27 16:35:54,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254485152] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:54,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720978506] [2024-06-27 16:35:54,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:35:54,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:54,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:54,693 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:35:54,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2024-06-27 16:35:55,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:35:55,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:35:55,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 16:35:55,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:55,326 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:35:55,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:55,433 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:35:55,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-06-27 16:35:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:35:55,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720978506] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:55,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:55,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 9] total 33 [2024-06-27 16:35:55,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179455509] [2024-06-27 16:35:55,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:55,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 16:35:55,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:55,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 16:35:55,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 16:35:55,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:35:55,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 461 transitions, 7505 flow. Second operand has 33 states, 33 states have (on average 4.787878787878788) internal successors, (158), 33 states have internal predecessors, (158), 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 16:35:55,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:55,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:35:55,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:35:56,984 INFO L124 PetriNetUnfolderBase]: 1598/3056 cut-off events. [2024-06-27 16:35:56,984 INFO L125 PetriNetUnfolderBase]: For 176946/176946 co-relation queries the response was YES. [2024-06-27 16:35:57,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33519 conditions, 3056 events. 1598/3056 cut-off events. For 176946/176946 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 20507 event pairs, 670 based on Foata normal form. 4/3056 useless extension candidates. Maximal degree in co-relation 33354. Up to 2605 conditions per place. [2024-06-27 16:35:57,035 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 371 selfloop transitions, 111 changer transitions 9/492 dead transitions. [2024-06-27 16:35:57,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 492 transitions, 8942 flow [2024-06-27 16:35:57,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 16:35:57,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 16:35:57,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 149 transitions. [2024-06-27 16:35:57,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30785123966942146 [2024-06-27 16:35:57,036 INFO L175 Difference]: Start difference. First operand has 491 places, 461 transitions, 7505 flow. Second operand 22 states and 149 transitions. [2024-06-27 16:35:57,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 492 transitions, 8942 flow [2024-06-27 16:35:58,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 492 transitions, 8651 flow, removed 55 selfloop flow, removed 19 redundant places. [2024-06-27 16:35:58,030 INFO L231 Difference]: Finished difference. Result has 495 places, 458 transitions, 7442 flow [2024-06-27 16:35:58,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=7202, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7442, PETRI_PLACES=495, PETRI_TRANSITIONS=458} [2024-06-27 16:35:58,038 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 473 predicate places. [2024-06-27 16:35:58,038 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 458 transitions, 7442 flow [2024-06-27 16:35:58,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.787878787878788) internal successors, (158), 33 states have internal predecessors, (158), 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 16:35:58,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:35:58,039 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:35:58,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2024-06-27 16:35:58,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:58,255 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:35:58,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:35:58,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1669699856, now seen corresponding path program 90 times [2024-06-27 16:35:58,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:35:58,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045872500] [2024-06-27 16:35:58,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:35:58,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:35:58,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:35:58,856 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:35:58,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:35:58,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045872500] [2024-06-27 16:35:58,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045872500] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:35:58,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994082651] [2024-06-27 16:35:58,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:35:58,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:35:58,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:35:58,858 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:35:58,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2024-06-27 16:35:59,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 16:35:59,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:35:59,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 41 conjunts are in the unsatisfiable core [2024-06-27 16:35:59,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:35:59,382 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:35:59,382 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 65 treesize of output 41 [2024-06-27 16:35:59,433 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:35:59,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:35:59,554 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:35:59,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-06-27 16:35:59,646 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:35:59,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994082651] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:35:59,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:35:59,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 30 [2024-06-27 16:35:59,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642126618] [2024-06-27 16:35:59,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:35:59,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:35:59,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:35:59,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:35:59,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:35:59,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:35:59,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 458 transitions, 7442 flow. Second operand has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 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 16:35:59,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:35:59,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:35:59,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:36:01,250 INFO L124 PetriNetUnfolderBase]: 1583/3013 cut-off events. [2024-06-27 16:36:01,251 INFO L125 PetriNetUnfolderBase]: For 175090/175090 co-relation queries the response was YES. [2024-06-27 16:36:01,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33141 conditions, 3013 events. 1583/3013 cut-off events. For 175090/175090 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 20118 event pairs, 646 based on Foata normal form. 4/3013 useless extension candidates. Maximal degree in co-relation 32976. Up to 2527 conditions per place. [2024-06-27 16:36:01,395 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 368 selfloop transitions, 119 changer transitions 9/497 dead transitions. [2024-06-27 16:36:01,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 497 transitions, 9017 flow [2024-06-27 16:36:01,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 16:36:01,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-27 16:36:01,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 179 transitions. [2024-06-27 16:36:01,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3129370629370629 [2024-06-27 16:36:01,396 INFO L175 Difference]: Start difference. First operand has 495 places, 458 transitions, 7442 flow. Second operand 26 states and 179 transitions. [2024-06-27 16:36:01,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 497 transitions, 9017 flow [2024-06-27 16:36:02,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 497 transitions, 8728 flow, removed 33 selfloop flow, removed 20 redundant places. [2024-06-27 16:36:02,350 INFO L231 Difference]: Finished difference. Result has 496 places, 454 transitions, 7362 flow [2024-06-27 16:36:02,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=7135, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7362, PETRI_PLACES=496, PETRI_TRANSITIONS=454} [2024-06-27 16:36:02,368 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 474 predicate places. [2024-06-27 16:36:02,368 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 454 transitions, 7362 flow [2024-06-27 16:36:02,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 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 16:36:02,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:36:02,369 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:36:02,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2024-06-27 16:36:02,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2024-06-27 16:36:02,569 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:36:02,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:36:02,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1305415477, now seen corresponding path program 91 times [2024-06-27 16:36:02,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:36:02,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208030263] [2024-06-27 16:36:02,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:36:02,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:36:02,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:03,115 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:36:03,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:36:03,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208030263] [2024-06-27 16:36:03,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208030263] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:36:03,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664181758] [2024-06-27 16:36:03,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:36:03,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:03,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:36:03,117 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:36:03,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2024-06-27 16:36:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:03,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:36:03,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:36:03,615 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:36:03,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:36:03,761 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:36:03,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-06-27 16:36:03,801 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:36:03,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664181758] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:36:03,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:36:03,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-06-27 16:36:03,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007015288] [2024-06-27 16:36:03,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:36:03,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:36:03,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:36:03,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:36:03,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:36:03,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:36:03,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 454 transitions, 7362 flow. Second operand has 29 states, 29 states have (on average 4.758620689655173) internal successors, (138), 29 states have internal predecessors, (138), 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 16:36:03,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:36:03,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:36:03,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:36:05,174 INFO L124 PetriNetUnfolderBase]: 1570/2983 cut-off events. [2024-06-27 16:36:05,174 INFO L125 PetriNetUnfolderBase]: For 171952/171952 co-relation queries the response was YES. [2024-06-27 16:36:05,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32759 conditions, 2983 events. 1570/2983 cut-off events. For 171952/171952 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 19827 event pairs, 658 based on Foata normal form. 3/2982 useless extension candidates. Maximal degree in co-relation 32595. Up to 2564 conditions per place. [2024-06-27 16:36:05,223 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 367 selfloop transitions, 95 changer transitions 11/474 dead transitions. [2024-06-27 16:36:05,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 474 transitions, 8589 flow [2024-06-27 16:36:05,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 16:36:05,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 16:36:05,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 108 transitions. [2024-06-27 16:36:05,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3068181818181818 [2024-06-27 16:36:05,224 INFO L175 Difference]: Start difference. First operand has 496 places, 454 transitions, 7362 flow. Second operand 16 states and 108 transitions. [2024-06-27 16:36:05,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 474 transitions, 8589 flow [2024-06-27 16:36:06,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 474 transitions, 8280 flow, removed 8 selfloop flow, removed 24 redundant places. [2024-06-27 16:36:06,234 INFO L231 Difference]: Finished difference. Result has 485 places, 451 transitions, 7201 flow [2024-06-27 16:36:06,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=7053, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7201, PETRI_PLACES=485, PETRI_TRANSITIONS=451} [2024-06-27 16:36:06,235 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 463 predicate places. [2024-06-27 16:36:06,235 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 451 transitions, 7201 flow [2024-06-27 16:36:06,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.758620689655173) internal successors, (138), 29 states have internal predecessors, (138), 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 16:36:06,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:36:06,235 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:36:06,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2024-06-27 16:36:06,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2024-06-27 16:36:06,448 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:36:06,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:36:06,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1687114832, now seen corresponding path program 92 times [2024-06-27 16:36:06,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:36:06,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104987298] [2024-06-27 16:36:06,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:36:06,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:36:06,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:36:07,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:36:07,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104987298] [2024-06-27 16:36:07,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104987298] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:36:07,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875287717] [2024-06-27 16:36:07,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:36:07,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:07,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:36:07,024 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:36:07,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2024-06-27 16:36:07,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:36:07,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:36:07,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 41 conjunts are in the unsatisfiable core [2024-06-27 16:36:07,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:36:07,551 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:36:07,551 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 65 treesize of output 41 [2024-06-27 16:36:07,585 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:36:07,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:36:07,715 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:36:07,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-06-27 16:36:07,780 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:36:07,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875287717] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:36:07,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:36:07,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 30 [2024-06-27 16:36:07,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664210689] [2024-06-27 16:36:07,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:36:07,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:36:07,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:36:07,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:36:07,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:36:07,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:36:07,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 451 transitions, 7201 flow. Second operand has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 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 16:36:07,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:36:07,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:36:07,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:36:08,946 INFO L124 PetriNetUnfolderBase]: 1557/2941 cut-off events. [2024-06-27 16:36:08,946 INFO L125 PetriNetUnfolderBase]: For 168487/168487 co-relation queries the response was YES. [2024-06-27 16:36:08,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32191 conditions, 2941 events. 1557/2941 cut-off events. For 168487/168487 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 19340 event pairs, 608 based on Foata normal form. 2/2939 useless extension candidates. Maximal degree in co-relation 32026. Up to 2412 conditions per place. [2024-06-27 16:36:08,995 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 358 selfloop transitions, 115 changer transitions 2/476 dead transitions. [2024-06-27 16:36:08,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 476 transitions, 8559 flow [2024-06-27 16:36:08,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 16:36:08,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 16:36:08,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 133 transitions. [2024-06-27 16:36:08,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-06-27 16:36:08,996 INFO L175 Difference]: Start difference. First operand has 485 places, 451 transitions, 7201 flow. Second operand 19 states and 133 transitions. [2024-06-27 16:36:08,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 476 transitions, 8559 flow [2024-06-27 16:36:09,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 476 transitions, 8323 flow, removed 21 selfloop flow, removed 17 redundant places. [2024-06-27 16:36:09,997 INFO L231 Difference]: Finished difference. Result has 478 places, 446 transitions, 7150 flow [2024-06-27 16:36:10,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6928, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7150, PETRI_PLACES=478, PETRI_TRANSITIONS=446} [2024-06-27 16:36:10,000 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 456 predicate places. [2024-06-27 16:36:10,000 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 446 transitions, 7150 flow [2024-06-27 16:36:10,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 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 16:36:10,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:36:10,001 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:36:10,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2024-06-27 16:36:10,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2024-06-27 16:36:10,204 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:36:10,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:36:10,204 INFO L85 PathProgramCache]: Analyzing trace with hash 896712779, now seen corresponding path program 93 times [2024-06-27 16:36:10,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:36:10,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247061472] [2024-06-27 16:36:10,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:36:10,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:36:10,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:10,736 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:36:10,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:36:10,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247061472] [2024-06-27 16:36:10,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247061472] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:36:10,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117457353] [2024-06-27 16:36:10,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:36:10,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:10,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:36:10,738 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:36:10,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2024-06-27 16:36:11,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-06-27 16:36:11,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:36:11,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 48 conjunts are in the unsatisfiable core [2024-06-27 16:36:11,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:36:11,275 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:36:11,275 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 46 treesize of output 30 [2024-06-27 16:36:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:36:11,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:36:11,535 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:36:11,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-06-27 16:36:11,606 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:36:11,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117457353] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:36:11,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:36:11,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 10] total 31 [2024-06-27 16:36:11,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419959196] [2024-06-27 16:36:11,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:36:11,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-27 16:36:11,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:36:11,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-27 16:36:11,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2024-06-27 16:36:11,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:36:11,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 446 transitions, 7150 flow. Second operand has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 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 16:36:11,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:36:11,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:36:11,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:36:13,199 INFO L124 PetriNetUnfolderBase]: 1573/2962 cut-off events. [2024-06-27 16:36:13,200 INFO L125 PetriNetUnfolderBase]: For 161306/161306 co-relation queries the response was YES. [2024-06-27 16:36:13,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32320 conditions, 2962 events. 1573/2962 cut-off events. For 161306/161306 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 19443 event pairs, 615 based on Foata normal form. 12/2970 useless extension candidates. Maximal degree in co-relation 32160. Up to 2429 conditions per place. [2024-06-27 16:36:13,246 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 377 selfloop transitions, 132 changer transitions 1/511 dead transitions. [2024-06-27 16:36:13,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 511 transitions, 9826 flow [2024-06-27 16:36:13,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-06-27 16:36:13,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-06-27 16:36:13,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 216 transitions. [2024-06-27 16:36:13,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31671554252199413 [2024-06-27 16:36:13,248 INFO L175 Difference]: Start difference. First operand has 478 places, 446 transitions, 7150 flow. Second operand 31 states and 216 transitions. [2024-06-27 16:36:13,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 511 transitions, 9826 flow [2024-06-27 16:36:14,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 511 transitions, 9558 flow, removed 14 selfloop flow, removed 20 redundant places. [2024-06-27 16:36:14,172 INFO L231 Difference]: Finished difference. Result has 489 places, 456 transitions, 7627 flow [2024-06-27 16:36:14,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6891, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=7627, PETRI_PLACES=489, PETRI_TRANSITIONS=456} [2024-06-27 16:36:14,173 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 467 predicate places. [2024-06-27 16:36:14,173 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 456 transitions, 7627 flow [2024-06-27 16:36:14,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 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 16:36:14,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:36:14,173 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:36:14,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2024-06-27 16:36:14,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:14,387 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:36:14,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:36:14,387 INFO L85 PathProgramCache]: Analyzing trace with hash 146749828, now seen corresponding path program 94 times [2024-06-27 16:36:14,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:36:14,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302346834] [2024-06-27 16:36:14,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:36:14,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:36:14,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:14,938 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:36:14,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:36:14,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302346834] [2024-06-27 16:36:14,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302346834] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:36:14,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918240653] [2024-06-27 16:36:14,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:36:14,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:14,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:36:14,940 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:36:14,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2024-06-27 16:36:15,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:36:15,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:36:15,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 16:36:15,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:36:15,414 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:36:15,415 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 81 treesize of output 45 [2024-06-27 16:36:15,461 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:36:15,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:36:15,591 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:36:15,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-06-27 16:36:15,655 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:36:15,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918240653] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:36:15,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:36:15,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-06-27 16:36:15,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319944352] [2024-06-27 16:36:15,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:36:15,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:36:15,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:36:15,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:36:15,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:36:15,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:36:15,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 456 transitions, 7627 flow. Second operand has 29 states, 29 states have (on average 4.827586206896552) internal successors, (140), 29 states have internal predecessors, (140), 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 16:36:15,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:36:15,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:36:15,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:36:17,159 INFO L124 PetriNetUnfolderBase]: 1592/2993 cut-off events. [2024-06-27 16:36:17,160 INFO L125 PetriNetUnfolderBase]: For 179513/179513 co-relation queries the response was YES. [2024-06-27 16:36:17,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33504 conditions, 2993 events. 1592/2993 cut-off events. For 179513/179513 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 19575 event pairs, 567 based on Foata normal form. 25/3014 useless extension candidates. Maximal degree in co-relation 33342. Up to 2317 conditions per place. [2024-06-27 16:36:17,207 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 381 selfloop transitions, 142 changer transitions 5/529 dead transitions. [2024-06-27 16:36:17,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 529 transitions, 10150 flow [2024-06-27 16:36:17,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-06-27 16:36:17,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-06-27 16:36:17,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 226 transitions. [2024-06-27 16:36:17,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3313782991202346 [2024-06-27 16:36:17,208 INFO L175 Difference]: Start difference. First operand has 489 places, 456 transitions, 7627 flow. Second operand 31 states and 226 transitions. [2024-06-27 16:36:17,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 529 transitions, 10150 flow [2024-06-27 16:36:18,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 529 transitions, 9587 flow, removed 188 selfloop flow, removed 25 redundant places. [2024-06-27 16:36:18,171 INFO L231 Difference]: Finished difference. Result has 498 places, 463 transitions, 7804 flow [2024-06-27 16:36:18,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=7052, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=7804, PETRI_PLACES=498, PETRI_TRANSITIONS=463} [2024-06-27 16:36:18,171 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 476 predicate places. [2024-06-27 16:36:18,172 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 463 transitions, 7804 flow [2024-06-27 16:36:18,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.827586206896552) internal successors, (140), 29 states have internal predecessors, (140), 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 16:36:18,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:36:18,172 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:36:18,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2024-06-27 16:36:18,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2024-06-27 16:36:18,384 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:36:18,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:36:18,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1080213537, now seen corresponding path program 95 times [2024-06-27 16:36:18,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:36:18,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478590350] [2024-06-27 16:36:18,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:36:18,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:36:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:18,981 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:36:18,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:36:18,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478590350] [2024-06-27 16:36:18,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478590350] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:36:18,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698199045] [2024-06-27 16:36:18,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:36:18,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:18,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:36:18,983 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:36:18,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2024-06-27 16:36:19,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:36:19,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:36:19,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 36 conjunts are in the unsatisfiable core [2024-06-27 16:36:19,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:36:19,549 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:36:19,550 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 73 treesize of output 45 [2024-06-27 16:36:19,590 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:36:19,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:36:19,711 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:36:19,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-06-27 16:36:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:36:19,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698199045] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:36:19,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:36:19,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 9] total 33 [2024-06-27 16:36:19,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872176698] [2024-06-27 16:36:19,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:36:19,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 16:36:19,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:36:19,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 16:36:19,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 16:36:19,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:36:19,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 463 transitions, 7804 flow. Second operand has 33 states, 33 states have (on average 4.787878787878788) internal successors, (158), 33 states have internal predecessors, (158), 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 16:36:19,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:36:19,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:36:19,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:36:21,385 INFO L124 PetriNetUnfolderBase]: 1576/2947 cut-off events. [2024-06-27 16:36:21,385 INFO L125 PetriNetUnfolderBase]: For 182712/182712 co-relation queries the response was YES. [2024-06-27 16:36:21,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33684 conditions, 2947 events. 1576/2947 cut-off events. For 182712/182712 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 19103 event pairs, 605 based on Foata normal form. 12/2955 useless extension candidates. Maximal degree in co-relation 33517. Up to 2443 conditions per place. [2024-06-27 16:36:21,435 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 382 selfloop transitions, 121 changer transitions 3/507 dead transitions. [2024-06-27 16:36:21,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 507 transitions, 9817 flow [2024-06-27 16:36:21,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 16:36:21,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 16:36:21,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 180 transitions. [2024-06-27 16:36:21,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32727272727272727 [2024-06-27 16:36:21,437 INFO L175 Difference]: Start difference. First operand has 498 places, 463 transitions, 7804 flow. Second operand 25 states and 180 transitions. [2024-06-27 16:36:21,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 507 transitions, 9817 flow [2024-06-27 16:36:22,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 507 transitions, 9234 flow, removed 194 selfloop flow, removed 27 redundant places. [2024-06-27 16:36:22,502 INFO L231 Difference]: Finished difference. Result has 493 places, 460 transitions, 7524 flow [2024-06-27 16:36:22,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=7287, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=7524, PETRI_PLACES=493, PETRI_TRANSITIONS=460} [2024-06-27 16:36:22,502 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 471 predicate places. [2024-06-27 16:36:22,502 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 460 transitions, 7524 flow [2024-06-27 16:36:22,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.787878787878788) internal successors, (158), 33 states have internal predecessors, (158), 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 16:36:22,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:36:22,503 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:36:22,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2024-06-27 16:36:22,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2024-06-27 16:36:22,715 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:36:22,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:36:22,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1883565717, now seen corresponding path program 96 times [2024-06-27 16:36:22,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:36:22,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321359238] [2024-06-27 16:36:22,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:36:22,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:36:22,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:23,272 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:36:23,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:36:23,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321359238] [2024-06-27 16:36:23,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321359238] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:36:23,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912771768] [2024-06-27 16:36:23,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:36:23,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:23,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:36:23,274 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:36:23,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2024-06-27 16:36:23,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 16:36:23,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:36:23,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:36:23,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:36:23,789 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:36:23,791 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 65 treesize of output 41 [2024-06-27 16:36:23,821 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:36:23,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:36:23,941 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:36:23,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-06-27 16:36:24,045 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:36:24,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912771768] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:36:24,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:36:24,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 29 [2024-06-27 16:36:24,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659088936] [2024-06-27 16:36:24,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:36:24,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:36:24,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:36:24,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:36:24,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:36:24,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:36:24,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 460 transitions, 7524 flow. Second operand has 29 states, 29 states have (on average 4.758620689655173) internal successors, (138), 29 states have internal predecessors, (138), 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 16:36:24,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:36:24,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:36:24,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:36:25,556 INFO L124 PetriNetUnfolderBase]: 1595/2990 cut-off events. [2024-06-27 16:36:25,557 INFO L125 PetriNetUnfolderBase]: For 181382/181382 co-relation queries the response was YES. [2024-06-27 16:36:25,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33821 conditions, 2990 events. 1595/2990 cut-off events. For 181382/181382 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 19486 event pairs, 686 based on Foata normal form. 8/2994 useless extension candidates. Maximal degree in co-relation 33657. Up to 2677 conditions per place. [2024-06-27 16:36:25,602 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 426 selfloop transitions, 79 changer transitions 7/513 dead transitions. [2024-06-27 16:36:25,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 513 transitions, 9673 flow [2024-06-27 16:36:25,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 16:36:25,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 16:36:25,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 184 transitions. [2024-06-27 16:36:25,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33454545454545453 [2024-06-27 16:36:25,604 INFO L175 Difference]: Start difference. First operand has 493 places, 460 transitions, 7524 flow. Second operand 25 states and 184 transitions. [2024-06-27 16:36:25,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 513 transitions, 9673 flow [2024-06-27 16:36:26,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 513 transitions, 9335 flow, removed 45 selfloop flow, removed 25 redundant places. [2024-06-27 16:36:26,552 INFO L231 Difference]: Finished difference. Result has 495 places, 465 transitions, 7595 flow [2024-06-27 16:36:26,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=7208, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=7595, PETRI_PLACES=495, PETRI_TRANSITIONS=465} [2024-06-27 16:36:26,552 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 473 predicate places. [2024-06-27 16:36:26,552 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 465 transitions, 7595 flow [2024-06-27 16:36:26,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.758620689655173) internal successors, (138), 29 states have internal predecessors, (138), 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 16:36:26,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:36:26,553 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:36:26,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2024-06-27 16:36:26,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:26,765 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:36:26,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:36:26,766 INFO L85 PathProgramCache]: Analyzing trace with hash -2043203345, now seen corresponding path program 97 times [2024-06-27 16:36:26,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:36:26,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012064034] [2024-06-27 16:36:26,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:36:26,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:36:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:27,273 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:36:27,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:36:27,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012064034] [2024-06-27 16:36:27,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012064034] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:36:27,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885741891] [2024-06-27 16:36:27,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:36:27,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:27,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:36:27,275 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:36:27,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2024-06-27 16:36:27,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:27,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:36:27,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:36:27,753 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:36:27,753 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 58 treesize of output 34 [2024-06-27 16:36:27,797 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:36:27,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:36:27,951 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:36:27,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-06-27 16:36:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:36:28,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885741891] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:36:28,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:36:28,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-06-27 16:36:28,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998661516] [2024-06-27 16:36:28,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:36:28,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:36:28,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:36:28,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:36:28,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:36:28,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:36:28,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 465 transitions, 7595 flow. Second operand has 29 states, 29 states have (on average 4.655172413793103) internal successors, (135), 29 states have internal predecessors, (135), 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 16:36:28,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:36:28,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:36:28,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:36:29,759 INFO L124 PetriNetUnfolderBase]: 1681/3160 cut-off events. [2024-06-27 16:36:29,760 INFO L125 PetriNetUnfolderBase]: For 207712/207712 co-relation queries the response was YES. [2024-06-27 16:36:29,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37022 conditions, 3160 events. 1681/3160 cut-off events. For 207712/207712 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 20834 event pairs, 701 based on Foata normal form. 25/3181 useless extension candidates. Maximal degree in co-relation 36855. Up to 2758 conditions per place. [2024-06-27 16:36:29,812 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 457 selfloop transitions, 93 changer transitions 3/554 dead transitions. [2024-06-27 16:36:29,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 554 transitions, 11352 flow [2024-06-27 16:36:29,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-06-27 16:36:29,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-06-27 16:36:29,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 228 transitions. [2024-06-27 16:36:29,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34545454545454546 [2024-06-27 16:36:29,813 INFO L175 Difference]: Start difference. First operand has 495 places, 465 transitions, 7595 flow. Second operand 30 states and 228 transitions. [2024-06-27 16:36:29,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 554 transitions, 11352 flow [2024-06-27 16:36:30,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 554 transitions, 11097 flow, removed 56 selfloop flow, removed 19 redundant places. [2024-06-27 16:36:30,918 INFO L231 Difference]: Finished difference. Result has 514 places, 493 transitions, 8934 flow [2024-06-27 16:36:30,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=7343, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=8934, PETRI_PLACES=514, PETRI_TRANSITIONS=493} [2024-06-27 16:36:30,919 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 492 predicate places. [2024-06-27 16:36:30,919 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 493 transitions, 8934 flow [2024-06-27 16:36:30,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.655172413793103) internal successors, (135), 29 states have internal predecessors, (135), 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 16:36:30,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:36:30,919 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:36:30,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2024-06-27 16:36:31,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:31,131 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:36:31,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:36:31,132 INFO L85 PathProgramCache]: Analyzing trace with hash 232381115, now seen corresponding path program 98 times [2024-06-27 16:36:31,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:36:31,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219159998] [2024-06-27 16:36:31,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:36:31,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:36:31,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:31,776 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:36:31,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:36:31,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219159998] [2024-06-27 16:36:31,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219159998] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:36:31,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573791919] [2024-06-27 16:36:31,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:36:31,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:31,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:36:31,778 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:36:31,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2024-06-27 16:36:32,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:36:32,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:36:32,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 41 conjunts are in the unsatisfiable core [2024-06-27 16:36:32,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:36:32,348 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:36:32,348 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 65 treesize of output 41 [2024-06-27 16:36:32,387 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:36:32,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:36:32,527 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:36:32,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-06-27 16:36:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:36:32,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573791919] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:36:32,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:36:32,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 30 [2024-06-27 16:36:32,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835520590] [2024-06-27 16:36:32,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:36:32,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:36:32,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:36:32,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:36:32,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:36:32,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:36:32,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 493 transitions, 8934 flow. Second operand has 30 states, 30 states have (on average 4.7) internal successors, (141), 30 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:32,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:36:32,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:36:32,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:36:34,222 INFO L124 PetriNetUnfolderBase]: 1706/3213 cut-off events. [2024-06-27 16:36:34,222 INFO L125 PetriNetUnfolderBase]: For 245476/245476 co-relation queries the response was YES. [2024-06-27 16:36:34,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39766 conditions, 3213 events. 1706/3213 cut-off events. For 245476/245476 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 21364 event pairs, 740 based on Foata normal form. 8/3217 useless extension candidates. Maximal degree in co-relation 39590. Up to 2868 conditions per place. [2024-06-27 16:36:34,282 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 453 selfloop transitions, 80 changer transitions 3/537 dead transitions. [2024-06-27 16:36:34,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 537 transitions, 10894 flow [2024-06-27 16:36:34,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 16:36:34,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 16:36:34,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 163 transitions. [2024-06-27 16:36:34,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3367768595041322 [2024-06-27 16:36:34,284 INFO L175 Difference]: Start difference. First operand has 514 places, 493 transitions, 8934 flow. Second operand 22 states and 163 transitions. [2024-06-27 16:36:34,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 537 transitions, 10894 flow [2024-06-27 16:36:35,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 537 transitions, 9871 flow, removed 445 selfloop flow, removed 15 redundant places. [2024-06-27 16:36:35,529 INFO L231 Difference]: Finished difference. Result has 522 places, 497 transitions, 8248 flow [2024-06-27 16:36:35,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=7911, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=8248, PETRI_PLACES=522, PETRI_TRANSITIONS=497} [2024-06-27 16:36:35,530 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 500 predicate places. [2024-06-27 16:36:35,530 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 497 transitions, 8248 flow [2024-06-27 16:36:35,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.7) internal successors, (141), 30 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:36:35,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:36:35,531 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:36:35,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2024-06-27 16:36:35,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2024-06-27 16:36:35,744 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:36:35,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:36:35,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1643782903, now seen corresponding path program 99 times [2024-06-27 16:36:35,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:36:35,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280232063] [2024-06-27 16:36:35,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:36:35,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:36:35,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:36,314 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:36:36,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:36:36,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280232063] [2024-06-27 16:36:36,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280232063] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:36:36,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332884916] [2024-06-27 16:36:36,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:36:36,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:36,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:36:36,317 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:36:36,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2024-06-27 16:36:36,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:36:36,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:36:36,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:36:36,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:36:36,888 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:36:36,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:36:37,030 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:36:37,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-06-27 16:36:37,092 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:36:37,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332884916] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:36:37,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:36:37,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 29 [2024-06-27 16:36:37,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133458119] [2024-06-27 16:36:37,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:36:37,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:36:37,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:36:37,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:36:37,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:36:37,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:36:37,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 497 transitions, 8248 flow. Second operand has 29 states, 29 states have (on average 4.827586206896552) internal successors, (140), 29 states have internal predecessors, (140), 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 16:36:37,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:36:37,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:36:37,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:36:38,723 INFO L124 PetriNetUnfolderBase]: 1708/3209 cut-off events. [2024-06-27 16:36:38,724 INFO L125 PetriNetUnfolderBase]: For 239724/239724 co-relation queries the response was YES. [2024-06-27 16:36:38,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38924 conditions, 3209 events. 1708/3209 cut-off events. For 239724/239724 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 21233 event pairs, 756 based on Foata normal form. 16/3223 useless extension candidates. Maximal degree in co-relation 38746. Up to 2949 conditions per place. [2024-06-27 16:36:38,770 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 461 selfloop transitions, 73 changer transitions 3/538 dead transitions. [2024-06-27 16:36:38,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 538 transitions, 10310 flow [2024-06-27 16:36:38,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 16:36:38,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 16:36:38,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 183 transitions. [2024-06-27 16:36:38,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30808080808080807 [2024-06-27 16:36:38,771 INFO L175 Difference]: Start difference. First operand has 522 places, 497 transitions, 8248 flow. Second operand 27 states and 183 transitions. [2024-06-27 16:36:38,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 538 transitions, 10310 flow [2024-06-27 16:36:39,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 538 transitions, 10129 flow, removed 17 selfloop flow, removed 19 redundant places. [2024-06-27 16:36:39,961 INFO L231 Difference]: Finished difference. Result has 531 places, 498 transitions, 8327 flow [2024-06-27 16:36:39,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8013, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=8327, PETRI_PLACES=531, PETRI_TRANSITIONS=498} [2024-06-27 16:36:39,961 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 509 predicate places. [2024-06-27 16:36:39,961 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 498 transitions, 8327 flow [2024-06-27 16:36:39,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.827586206896552) internal successors, (140), 29 states have internal predecessors, (140), 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 16:36:39,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:36:39,963 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:36:39,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2024-06-27 16:36:40,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:40,175 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:36:40,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:36:40,176 INFO L85 PathProgramCache]: Analyzing trace with hash -601633521, now seen corresponding path program 100 times [2024-06-27 16:36:40,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:36:40,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071208605] [2024-06-27 16:36:40,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:36:40,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:36:40,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:40,750 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:36:40,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:36:40,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071208605] [2024-06-27 16:36:40,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071208605] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:36:40,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556851110] [2024-06-27 16:36:40,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:36:40,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:40,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:36:40,752 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:36:40,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2024-06-27 16:36:41,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:36:41,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:36:41,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:36:41,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:36:41,242 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:36:41,242 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 58 treesize of output 34 [2024-06-27 16:36:41,292 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:36:41,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:36:41,425 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:36:41,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-06-27 16:36:41,486 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:36:41,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556851110] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:36:41,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:36:41,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2024-06-27 16:36:41,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687737601] [2024-06-27 16:36:41,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:36:41,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:36:41,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:36:41,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:36:41,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:36:41,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:36:41,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 498 transitions, 8327 flow. Second operand has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 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 16:36:41,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:36:41,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:36:41,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:36:43,257 INFO L124 PetriNetUnfolderBase]: 1719/3250 cut-off events. [2024-06-27 16:36:43,258 INFO L125 PetriNetUnfolderBase]: For 257999/257999 co-relation queries the response was YES. [2024-06-27 16:36:43,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40123 conditions, 3250 events. 1719/3250 cut-off events. For 257999/257999 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 21717 event pairs, 716 based on Foata normal form. 15/3261 useless extension candidates. Maximal degree in co-relation 39942. Up to 2833 conditions per place. [2024-06-27 16:36:43,320 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 459 selfloop transitions, 83 changer transitions 8/551 dead transitions. [2024-06-27 16:36:43,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 551 transitions, 10784 flow [2024-06-27 16:36:43,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 16:36:43,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 16:36:43,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 189 transitions. [2024-06-27 16:36:43,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-06-27 16:36:43,322 INFO L175 Difference]: Start difference. First operand has 531 places, 498 transitions, 8327 flow. Second operand 27 states and 189 transitions. [2024-06-27 16:36:43,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 551 transitions, 10784 flow [2024-06-27 16:36:44,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 551 transitions, 10475 flow, removed 58 selfloop flow, removed 26 redundant places. [2024-06-27 16:36:44,644 INFO L231 Difference]: Finished difference. Result has 535 places, 499 transitions, 8432 flow [2024-06-27 16:36:44,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8014, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=8432, PETRI_PLACES=535, PETRI_TRANSITIONS=499} [2024-06-27 16:36:44,644 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 513 predicate places. [2024-06-27 16:36:44,644 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 499 transitions, 8432 flow [2024-06-27 16:36:44,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 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 16:36:44,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:36:44,645 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:36:44,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2024-06-27 16:36:44,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:44,852 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:36:44,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:36:44,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1864837368, now seen corresponding path program 101 times [2024-06-27 16:36:44,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:36:44,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32630212] [2024-06-27 16:36:44,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:36:44,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:36:44,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:45,411 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:36:45,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:36:45,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32630212] [2024-06-27 16:36:45,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32630212] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:36:45,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14851677] [2024-06-27 16:36:45,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:36:45,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:45,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:36:45,413 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:36:45,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2024-06-27 16:36:45,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:36:45,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:36:45,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 36 conjunts are in the unsatisfiable core [2024-06-27 16:36:45,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:36:46,071 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:36:46,072 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 73 treesize of output 45 [2024-06-27 16:36:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:36:46,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:36:46,249 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:36:46,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-06-27 16:36:46,312 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:36:46,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14851677] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:36:46,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:36:46,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 9] total 33 [2024-06-27 16:36:46,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242536326] [2024-06-27 16:36:46,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:36:46,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 16:36:46,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:36:46,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 16:36:46,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 16:36:46,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:36:46,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 499 transitions, 8432 flow. Second operand has 33 states, 33 states have (on average 4.848484848484849) internal successors, (160), 33 states have internal predecessors, (160), 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 16:36:46,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:36:46,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:36:46,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:36:48,547 INFO L124 PetriNetUnfolderBase]: 1780/3358 cut-off events. [2024-06-27 16:36:48,547 INFO L125 PetriNetUnfolderBase]: For 290370/290370 co-relation queries the response was YES. [2024-06-27 16:36:48,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42645 conditions, 3358 events. 1780/3358 cut-off events. For 290370/290370 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 22578 event pairs, 743 based on Foata normal form. 10/3364 useless extension candidates. Maximal degree in co-relation 42460. Up to 2911 conditions per place. [2024-06-27 16:36:48,608 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 494 selfloop transitions, 95 changer transitions 4/594 dead transitions. [2024-06-27 16:36:48,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 594 transitions, 12004 flow [2024-06-27 16:36:48,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-06-27 16:36:48,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-06-27 16:36:48,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 241 transitions. [2024-06-27 16:36:48,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34232954545454547 [2024-06-27 16:36:48,610 INFO L175 Difference]: Start difference. First operand has 535 places, 499 transitions, 8432 flow. Second operand 32 states and 241 transitions. [2024-06-27 16:36:48,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 594 transitions, 12004 flow [2024-06-27 16:36:50,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 594 transitions, 11615 flow, removed 120 selfloop flow, removed 24 redundant places. [2024-06-27 16:36:50,278 INFO L231 Difference]: Finished difference. Result has 550 places, 515 transitions, 9107 flow [2024-06-27 16:36:50,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8113, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=9107, PETRI_PLACES=550, PETRI_TRANSITIONS=515} [2024-06-27 16:36:50,279 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 528 predicate places. [2024-06-27 16:36:50,279 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 515 transitions, 9107 flow [2024-06-27 16:36:50,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.848484848484849) internal successors, (160), 33 states have internal predecessors, (160), 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 16:36:50,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:36:50,279 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:36:50,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2024-06-27 16:36:50,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2024-06-27 16:36:50,492 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:36:50,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:36:50,492 INFO L85 PathProgramCache]: Analyzing trace with hash 2044495605, now seen corresponding path program 102 times [2024-06-27 16:36:50,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:36:50,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058360901] [2024-06-27 16:36:50,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:36:50,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:36:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:51,066 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:36:51,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:36:51,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058360901] [2024-06-27 16:36:51,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058360901] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:36:51,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840243037] [2024-06-27 16:36:51,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:36:51,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:51,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:36:51,069 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:36:51,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2024-06-27 16:36:51,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 16:36:51,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:36:51,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:36:51,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:36:51,610 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:36:51,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:36:51,709 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:36:51,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-06-27 16:36:51,764 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:36:51,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840243037] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:36:51,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:36:51,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 28 [2024-06-27 16:36:51,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969979025] [2024-06-27 16:36:51,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:36:51,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-06-27 16:36:51,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:36:51,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-06-27 16:36:51,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2024-06-27 16:36:51,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:36:51,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 515 transitions, 9107 flow. Second operand has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 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 16:36:51,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:36:51,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:36:51,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:36:53,376 INFO L124 PetriNetUnfolderBase]: 1770/3340 cut-off events. [2024-06-27 16:36:53,377 INFO L125 PetriNetUnfolderBase]: For 289080/289080 co-relation queries the response was YES. [2024-06-27 16:36:53,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42608 conditions, 3340 events. 1770/3340 cut-off events. For 289080/289080 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 22399 event pairs, 809 based on Foata normal form. 6/3342 useless extension candidates. Maximal degree in co-relation 42417. Up to 3132 conditions per place. [2024-06-27 16:36:53,443 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 465 selfloop transitions, 58 changer transitions 19/543 dead transitions. [2024-06-27 16:36:53,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 543 transitions, 10544 flow [2024-06-27 16:36:53,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 16:36:53,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 16:36:53,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 135 transitions. [2024-06-27 16:36:53,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2922077922077922 [2024-06-27 16:36:53,445 INFO L175 Difference]: Start difference. First operand has 550 places, 515 transitions, 9107 flow. Second operand 21 states and 135 transitions. [2024-06-27 16:36:53,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 543 transitions, 10544 flow [2024-06-27 16:36:55,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 543 transitions, 9853 flow, removed 278 selfloop flow, removed 23 redundant places. [2024-06-27 16:36:55,149 INFO L231 Difference]: Finished difference. Result has 550 places, 513 transitions, 8588 flow [2024-06-27 16:36:55,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8476, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=8588, PETRI_PLACES=550, PETRI_TRANSITIONS=513} [2024-06-27 16:36:55,150 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 528 predicate places. [2024-06-27 16:36:55,150 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 513 transitions, 8588 flow [2024-06-27 16:36:55,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 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 16:36:55,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:36:55,151 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:36:55,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2024-06-27 16:36:55,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:55,363 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:36:55,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:36:55,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1486671480, now seen corresponding path program 103 times [2024-06-27 16:36:55,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:36:55,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897628119] [2024-06-27 16:36:55,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:36:55,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:36:55,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:56,019 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:36:56,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:36:56,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897628119] [2024-06-27 16:36:56,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897628119] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:36:56,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090635615] [2024-06-27 16:36:56,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:36:56,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:36:56,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:36:56,027 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:36:56,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2024-06-27 16:36:56,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:36:56,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 16:36:56,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:36:56,604 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:36:56,604 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 81 treesize of output 45 [2024-06-27 16:36:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:36:56,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:36:56,830 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:36:56,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-06-27 16:36:56,900 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:36:56,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090635615] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:36:56,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:36:56,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2024-06-27 16:36:56,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766908965] [2024-06-27 16:36:56,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:36:56,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:36:56,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:36:56,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:36:56,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:36:56,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:36:56,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 513 transitions, 8588 flow. Second operand has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 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 16:36:56,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:36:56,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:36:56,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:36:58,623 INFO L124 PetriNetUnfolderBase]: 1776/3351 cut-off events. [2024-06-27 16:36:58,623 INFO L125 PetriNetUnfolderBase]: For 298915/298915 co-relation queries the response was YES. [2024-06-27 16:36:58,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42238 conditions, 3351 events. 1776/3351 cut-off events. For 298915/298915 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 22457 event pairs, 769 based on Foata normal form. 20/3369 useless extension candidates. Maximal degree in co-relation 42047. Up to 3009 conditions per place. [2024-06-27 16:36:58,689 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 465 selfloop transitions, 80 changer transitions 3/549 dead transitions. [2024-06-27 16:36:58,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 549 transitions, 10579 flow [2024-06-27 16:36:58,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 16:36:58,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 16:36:58,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 157 transitions. [2024-06-27 16:36:58,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3243801652892562 [2024-06-27 16:36:58,690 INFO L175 Difference]: Start difference. First operand has 550 places, 513 transitions, 8588 flow. Second operand 22 states and 157 transitions. [2024-06-27 16:36:58,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 549 transitions, 10579 flow [2024-06-27 16:37:00,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 546 places, 549 transitions, 10387 flow, removed 32 selfloop flow, removed 20 redundant places. [2024-06-27 16:37:00,398 INFO L231 Difference]: Finished difference. Result has 548 places, 516 transitions, 8786 flow [2024-06-27 16:37:00,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8412, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=8786, PETRI_PLACES=548, PETRI_TRANSITIONS=516} [2024-06-27 16:37:00,399 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 526 predicate places. [2024-06-27 16:37:00,399 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 516 transitions, 8786 flow [2024-06-27 16:37:00,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 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 16:37:00,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:37:00,399 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:37:00,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2024-06-27 16:37:00,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2024-06-27 16:37:00,603 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:37:00,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:37:00,603 INFO L85 PathProgramCache]: Analyzing trace with hash 2046838072, now seen corresponding path program 104 times [2024-06-27 16:37:00,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:37:00,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533290898] [2024-06-27 16:37:00,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:37:00,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:37:00,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:37:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:37:01,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:37:01,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533290898] [2024-06-27 16:37:01,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533290898] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:37:01,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976213369] [2024-06-27 16:37:01,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:37:01,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:37:01,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:37:01,140 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:37:01,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2024-06-27 16:37:01,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:37:01,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:37:01,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 43 conjunts are in the unsatisfiable core [2024-06-27 16:37:01,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:37:01,766 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 16:37:01,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-06-27 16:37:01,770 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:37:01,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:37:01,911 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:37:01,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-06-27 16:37:01,968 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:37:01,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976213369] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:37:01,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:37:01,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 29 [2024-06-27 16:37:01,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205861169] [2024-06-27 16:37:01,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:37:01,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:37:01,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:37:01,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:37:01,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:37:01,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:37:01,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 516 transitions, 8786 flow. Second operand has 29 states, 29 states have (on average 4.862068965517241) internal successors, (141), 29 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:37:01,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:37:01,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:37:01,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:37:03,527 INFO L124 PetriNetUnfolderBase]: 1811/3411 cut-off events. [2024-06-27 16:37:03,528 INFO L125 PetriNetUnfolderBase]: For 289827/289827 co-relation queries the response was YES. [2024-06-27 16:37:03,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43065 conditions, 3411 events. 1811/3411 cut-off events. For 289827/289827 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 22939 event pairs, 793 based on Foata normal form. 10/3419 useless extension candidates. Maximal degree in co-relation 42877. Up to 3117 conditions per place. [2024-06-27 16:37:03,591 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 492 selfloop transitions, 76 changer transitions 0/569 dead transitions. [2024-06-27 16:37:03,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 572 places, 569 transitions, 10951 flow [2024-06-27 16:37:03,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 16:37:03,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 16:37:03,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 177 transitions. [2024-06-27 16:37:03,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32181818181818184 [2024-06-27 16:37:03,592 INFO L175 Difference]: Start difference. First operand has 548 places, 516 transitions, 8786 flow. Second operand 25 states and 177 transitions. [2024-06-27 16:37:03,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 572 places, 569 transitions, 10951 flow [2024-06-27 16:37:05,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 569 transitions, 10728 flow, removed 59 selfloop flow, removed 18 redundant places. [2024-06-27 16:37:05,343 INFO L231 Difference]: Finished difference. Result has 556 places, 521 transitions, 8826 flow [2024-06-27 16:37:05,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8563, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=8826, PETRI_PLACES=556, PETRI_TRANSITIONS=521} [2024-06-27 16:37:05,344 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 534 predicate places. [2024-06-27 16:37:05,344 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 521 transitions, 8826 flow [2024-06-27 16:37:05,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.862068965517241) internal successors, (141), 29 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:37:05,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:37:05,345 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:37:05,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2024-06-27 16:37:05,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:37:05,549 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:37:05,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:37:05,549 INFO L85 PathProgramCache]: Analyzing trace with hash -64340596, now seen corresponding path program 105 times [2024-06-27 16:37:05,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:37:05,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750639549] [2024-06-27 16:37:05,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:37:05,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:37:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:37:06,127 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:37:06,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:37:06,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750639549] [2024-06-27 16:37:06,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750639549] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:37:06,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138711627] [2024-06-27 16:37:06,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:37:06,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:37:06,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:37:06,129 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:37:06,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2024-06-27 16:37:06,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-06-27 16:37:06,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:37:06,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:37:06,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:37:06,709 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:37:06,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:37:06,824 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:37:06,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-06-27 16:37:06,894 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:37:06,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138711627] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:37:06,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:37:06,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 29 [2024-06-27 16:37:06,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357402326] [2024-06-27 16:37:06,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:37:06,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:37:06,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:37:06,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:37:06,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:37:06,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:37:06,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 521 transitions, 8826 flow. Second operand has 29 states, 29 states have (on average 4.896551724137931) internal successors, (142), 29 states have internal predecessors, (142), 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 16:37:06,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:37:06,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:37:06,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:37:08,497 INFO L124 PetriNetUnfolderBase]: 1825/3435 cut-off events. [2024-06-27 16:37:08,498 INFO L125 PetriNetUnfolderBase]: For 297066/297066 co-relation queries the response was YES. [2024-06-27 16:37:08,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43525 conditions, 3435 events. 1825/3435 cut-off events. For 297066/297066 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 23075 event pairs, 790 based on Foata normal form. 10/3443 useless extension candidates. Maximal degree in co-relation 43335. Up to 3126 conditions per place. [2024-06-27 16:37:08,568 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 484 selfloop transitions, 77 changer transitions 0/562 dead transitions. [2024-06-27 16:37:08,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 562 transitions, 10886 flow [2024-06-27 16:37:08,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 16:37:08,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 16:37:08,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 163 transitions. [2024-06-27 16:37:08,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3221343873517787 [2024-06-27 16:37:08,569 INFO L175 Difference]: Start difference. First operand has 556 places, 521 transitions, 8826 flow. Second operand 23 states and 163 transitions. [2024-06-27 16:37:08,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 578 places, 562 transitions, 10886 flow [2024-06-27 16:37:10,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 562 transitions, 10729 flow, removed 6 selfloop flow, removed 21 redundant places. [2024-06-27 16:37:10,383 INFO L231 Difference]: Finished difference. Result has 559 places, 523 transitions, 8971 flow [2024-06-27 16:37:10,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8669, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=8971, PETRI_PLACES=559, PETRI_TRANSITIONS=523} [2024-06-27 16:37:10,384 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 537 predicate places. [2024-06-27 16:37:10,384 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 523 transitions, 8971 flow [2024-06-27 16:37:10,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.896551724137931) internal successors, (142), 29 states have internal predecessors, (142), 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 16:37:10,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:37:10,384 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:37:10,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2024-06-27 16:37:10,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2024-06-27 16:37:10,592 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:37:10,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:37:10,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1748607246, now seen corresponding path program 106 times [2024-06-27 16:37:10,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:37:10,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758737287] [2024-06-27 16:37:10,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:37:10,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:37:10,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:37:11,133 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:37:11,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:37:11,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758737287] [2024-06-27 16:37:11,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758737287] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:37:11,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088788303] [2024-06-27 16:37:11,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:37:11,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:37:11,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:37:11,135 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:37:11,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2024-06-27 16:37:11,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:37:11,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:37:11,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 16:37:11,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:37:11,640 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:37:11,641 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 81 treesize of output 45 [2024-06-27 16:37:11,689 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:37:11,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:37:11,824 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:37:11,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-06-27 16:37:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:37:11,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088788303] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:37:11,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:37:11,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2024-06-27 16:37:11,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811805896] [2024-06-27 16:37:11,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:37:11,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:37:11,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:37:11,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:37:11,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:37:11,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:37:11,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 523 transitions, 8971 flow. Second operand has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 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 16:37:11,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:37:11,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:37:11,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:37:13,831 INFO L124 PetriNetUnfolderBase]: 1857/3503 cut-off events. [2024-06-27 16:37:13,831 INFO L125 PetriNetUnfolderBase]: For 324672/324672 co-relation queries the response was YES. [2024-06-27 16:37:13,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45377 conditions, 3503 events. 1857/3503 cut-off events. For 324672/324672 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 23751 event pairs, 763 based on Foata normal form. 10/3511 useless extension candidates. Maximal degree in co-relation 45185. Up to 3075 conditions per place. [2024-06-27 16:37:13,893 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 486 selfloop transitions, 97 changer transitions 6/590 dead transitions. [2024-06-27 16:37:13,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 590 transitions, 11937 flow [2024-06-27 16:37:13,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 16:37:13,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 16:37:13,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 198 transitions. [2024-06-27 16:37:13,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-27 16:37:13,894 INFO L175 Difference]: Start difference. First operand has 559 places, 523 transitions, 8971 flow. Second operand 27 states and 198 transitions. [2024-06-27 16:37:13,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 590 transitions, 11937 flow [2024-06-27 16:37:15,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 590 transitions, 11611 flow, removed 90 selfloop flow, removed 20 redundant places. [2024-06-27 16:37:15,539 INFO L231 Difference]: Finished difference. Result has 570 places, 531 transitions, 9379 flow [2024-06-27 16:37:15,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8735, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=9379, PETRI_PLACES=570, PETRI_TRANSITIONS=531} [2024-06-27 16:37:15,539 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 548 predicate places. [2024-06-27 16:37:15,540 INFO L495 AbstractCegarLoop]: Abstraction has has 570 places, 531 transitions, 9379 flow [2024-06-27 16:37:15,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 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 16:37:15,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:37:15,540 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:37:15,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2024-06-27 16:37:15,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2024-06-27 16:37:15,752 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:37:15,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:37:15,753 INFO L85 PathProgramCache]: Analyzing trace with hash 793219092, now seen corresponding path program 107 times [2024-06-27 16:37:15,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:37:15,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069156182] [2024-06-27 16:37:15,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:37:15,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:37:15,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:37:16,322 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:37:16,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:37:16,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069156182] [2024-06-27 16:37:16,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069156182] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:37:16,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50782354] [2024-06-27 16:37:16,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:37:16,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:37:16,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:37:16,324 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:37:16,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2024-06-27 16:37:16,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:37:16,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:37:16,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 36 conjunts are in the unsatisfiable core [2024-06-27 16:37:16,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:37:17,074 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:37:17,074 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 73 treesize of output 45 [2024-06-27 16:37:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:37:17,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:37:17,251 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:37:17,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-06-27 16:37:17,306 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:37:17,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50782354] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:37:17,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:37:17,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 9] total 33 [2024-06-27 16:37:17,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898679057] [2024-06-27 16:37:17,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:37:17,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 16:37:17,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:37:17,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 16:37:17,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 16:37:17,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:37:17,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 570 places, 531 transitions, 9379 flow. Second operand has 33 states, 33 states have (on average 4.787878787878788) internal successors, (158), 33 states have internal predecessors, (158), 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 16:37:17,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:37:17,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:37:17,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:37:19,414 INFO L124 PetriNetUnfolderBase]: 1843/3469 cut-off events. [2024-06-27 16:37:19,415 INFO L125 PetriNetUnfolderBase]: For 326857/326857 co-relation queries the response was YES. [2024-06-27 16:37:19,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45283 conditions, 3469 events. 1843/3469 cut-off events. For 326857/326857 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 23369 event pairs, 768 based on Foata normal form. 8/3475 useless extension candidates. Maximal degree in co-relation 45087. Up to 3058 conditions per place. [2024-06-27 16:37:19,478 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 486 selfloop transitions, 88 changer transitions 3/578 dead transitions. [2024-06-27 16:37:19,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 578 transitions, 11439 flow [2024-06-27 16:37:19,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 16:37:19,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-27 16:37:19,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 185 transitions. [2024-06-27 16:37:19,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32342657342657344 [2024-06-27 16:37:19,479 INFO L175 Difference]: Start difference. First operand has 570 places, 531 transitions, 9379 flow. Second operand 26 states and 185 transitions. [2024-06-27 16:37:19,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 578 transitions, 11439 flow [2024-06-27 16:37:21,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 573 places, 578 transitions, 10992 flow, removed 145 selfloop flow, removed 20 redundant places. [2024-06-27 16:37:21,390 INFO L231 Difference]: Finished difference. Result has 573 places, 526 transitions, 9016 flow [2024-06-27 16:37:21,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8846, PETRI_DIFFERENCE_MINUEND_PLACES=548, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=9016, PETRI_PLACES=573, PETRI_TRANSITIONS=526} [2024-06-27 16:37:21,390 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 551 predicate places. [2024-06-27 16:37:21,391 INFO L495 AbstractCegarLoop]: Abstraction has has 573 places, 526 transitions, 9016 flow [2024-06-27 16:37:21,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.787878787878788) internal successors, (158), 33 states have internal predecessors, (158), 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 16:37:21,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:37:21,391 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:37:21,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2024-06-27 16:37:21,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2024-06-27 16:37:21,604 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:37:21,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:37:21,605 INFO L85 PathProgramCache]: Analyzing trace with hash 971410225, now seen corresponding path program 108 times [2024-06-27 16:37:21,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:37:21,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958611893] [2024-06-27 16:37:21,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:37:21,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:37:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:37:22,173 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:37:22,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:37:22,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958611893] [2024-06-27 16:37:22,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958611893] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:37:22,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762034374] [2024-06-27 16:37:22,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:37:22,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:37:22,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:37:22,176 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:37:22,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2024-06-27 16:37:22,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:37:22,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:37:22,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:37:22,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:37:22,770 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:37:22,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:37:22,913 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:37:22,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-06-27 16:37:22,968 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:37:22,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762034374] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:37:22,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:37:22,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 29 [2024-06-27 16:37:22,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663722569] [2024-06-27 16:37:22,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:37:22,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:37:22,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:37:22,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:37:22,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:37:22,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:37:22,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 573 places, 526 transitions, 9016 flow. Second operand has 29 states, 29 states have (on average 4.689655172413793) internal successors, (136), 29 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:37:22,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:37:22,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:37:22,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:37:24,528 INFO L124 PetriNetUnfolderBase]: 1840/3471 cut-off events. [2024-06-27 16:37:24,528 INFO L125 PetriNetUnfolderBase]: For 319306/319306 co-relation queries the response was YES. [2024-06-27 16:37:24,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44662 conditions, 3471 events. 1840/3471 cut-off events. For 319306/319306 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 23432 event pairs, 840 based on Foata normal form. 6/3475 useless extension candidates. Maximal degree in co-relation 44467. Up to 3271 conditions per place. [2024-06-27 16:37:24,594 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 471 selfloop transitions, 62 changer transitions 12/546 dead transitions. [2024-06-27 16:37:24,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 546 transitions, 10301 flow [2024-06-27 16:37:24,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 16:37:24,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 16:37:24,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 135 transitions. [2024-06-27 16:37:24,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2922077922077922 [2024-06-27 16:37:24,596 INFO L175 Difference]: Start difference. First operand has 573 places, 526 transitions, 9016 flow. Second operand 21 states and 135 transitions. [2024-06-27 16:37:24,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 546 transitions, 10301 flow [2024-06-27 16:37:26,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 546 transitions, 10078 flow, removed 20 selfloop flow, removed 24 redundant places. [2024-06-27 16:37:26,270 INFO L231 Difference]: Finished difference. Result has 568 places, 521 transitions, 8852 flow [2024-06-27 16:37:26,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8782, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=8852, PETRI_PLACES=568, PETRI_TRANSITIONS=521} [2024-06-27 16:37:26,271 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 546 predicate places. [2024-06-27 16:37:26,271 INFO L495 AbstractCegarLoop]: Abstraction has has 568 places, 521 transitions, 8852 flow [2024-06-27 16:37:26,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.689655172413793) internal successors, (136), 29 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:37:26,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:37:26,271 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:37:26,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2024-06-27 16:37:26,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2024-06-27 16:37:26,484 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:37:26,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:37:26,484 INFO L85 PathProgramCache]: Analyzing trace with hash -903062494, now seen corresponding path program 109 times [2024-06-27 16:37:26,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:37:26,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613037715] [2024-06-27 16:37:26,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:37:26,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:37:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:37:27,026 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:37:27,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:37:27,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613037715] [2024-06-27 16:37:27,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613037715] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:37:27,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820320951] [2024-06-27 16:37:27,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:37:27,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:37:27,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:37:27,027 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:37:27,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2024-06-27 16:37:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:37:27,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:37:27,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:37:27,573 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-06-27 16:37:27,573 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 33 treesize of output 9 [2024-06-27 16:37:27,576 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:37:27,577 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:37:27,722 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:37:27,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-06-27 16:37:27,779 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:37:27,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820320951] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:37:27,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:37:27,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-06-27 16:37:27,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072977654] [2024-06-27 16:37:27,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:37:27,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:37:27,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:37:27,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:37:27,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:37:27,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:37:27,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 568 places, 521 transitions, 8852 flow. Second operand has 29 states, 29 states have (on average 4.827586206896552) internal successors, (140), 29 states have internal predecessors, (140), 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 16:37:27,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:37:27,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:37:27,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:37:29,227 INFO L124 PetriNetUnfolderBase]: 1871/3505 cut-off events. [2024-06-27 16:37:29,227 INFO L125 PetriNetUnfolderBase]: For 322099/322099 co-relation queries the response was YES. [2024-06-27 16:37:29,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45239 conditions, 3505 events. 1871/3505 cut-off events. For 322099/322099 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 23540 event pairs, 809 based on Foata normal form. 10/3513 useless extension candidates. Maximal degree in co-relation 45043. Up to 3205 conditions per place. [2024-06-27 16:37:29,295 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 490 selfloop transitions, 72 changer transitions 1/564 dead transitions. [2024-06-27 16:37:29,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 584 places, 564 transitions, 10896 flow [2024-06-27 16:37:29,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 16:37:29,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 16:37:29,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 151 transitions. [2024-06-27 16:37:29,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3119834710743802 [2024-06-27 16:37:29,296 INFO L175 Difference]: Start difference. First operand has 568 places, 521 transitions, 8852 flow. Second operand 22 states and 151 transitions. [2024-06-27 16:37:29,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 584 places, 564 transitions, 10896 flow [2024-06-27 16:37:31,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 563 places, 564 transitions, 10756 flow, removed 5 selfloop flow, removed 21 redundant places. [2024-06-27 16:37:31,317 INFO L231 Difference]: Finished difference. Result has 566 places, 526 transitions, 9005 flow [2024-06-27 16:37:31,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8707, PETRI_DIFFERENCE_MINUEND_PLACES=542, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=9005, PETRI_PLACES=566, PETRI_TRANSITIONS=526} [2024-06-27 16:37:31,317 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 544 predicate places. [2024-06-27 16:37:31,317 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 526 transitions, 9005 flow [2024-06-27 16:37:31,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.827586206896552) internal successors, (140), 29 states have internal predecessors, (140), 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 16:37:31,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:37:31,318 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:37:31,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2024-06-27 16:37:31,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:37:31,530 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:37:31,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:37:31,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1760415628, now seen corresponding path program 110 times [2024-06-27 16:37:31,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:37:31,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358976176] [2024-06-27 16:37:31,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:37:31,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:37:31,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:37:32,094 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:37:32,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:37:32,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358976176] [2024-06-27 16:37:32,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358976176] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:37:32,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126142814] [2024-06-27 16:37:32,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:37:32,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:37:32,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:37:32,095 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:37:32,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2024-06-27 16:37:32,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:37:32,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:37:32,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 41 conjunts are in the unsatisfiable core [2024-06-27 16:37:32,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:37:32,743 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:37:32,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:37:32,884 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:37:32,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-06-27 16:37:32,964 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:37:32,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126142814] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:37:32,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:37:32,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 29 [2024-06-27 16:37:32,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695561256] [2024-06-27 16:37:32,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:37:32,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:37:32,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:37:32,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:37:32,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:37:32,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:37:32,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 526 transitions, 9005 flow. Second operand has 29 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 states have internal predecessors, (139), 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 16:37:32,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:37:32,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:37:32,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:37:34,515 INFO L124 PetriNetUnfolderBase]: 1865/3501 cut-off events. [2024-06-27 16:37:34,515 INFO L125 PetriNetUnfolderBase]: For 319654/319654 co-relation queries the response was YES. [2024-06-27 16:37:34,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45244 conditions, 3501 events. 1865/3501 cut-off events. For 319654/319654 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 23570 event pairs, 843 based on Foata normal form. 4/3503 useless extension candidates. Maximal degree in co-relation 45048. Up to 3316 conditions per place. [2024-06-27 16:37:34,573 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 478 selfloop transitions, 57 changer transitions 14/550 dead transitions. [2024-06-27 16:37:34,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 584 places, 550 transitions, 10446 flow [2024-06-27 16:37:34,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 16:37:34,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 16:37:34,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 132 transitions. [2024-06-27 16:37:34,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2857142857142857 [2024-06-27 16:37:34,575 INFO L175 Difference]: Start difference. First operand has 566 places, 526 transitions, 9005 flow. Second operand 21 states and 132 transitions. [2024-06-27 16:37:34,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 584 places, 550 transitions, 10446 flow [2024-06-27 16:37:36,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 550 transitions, 10291 flow, removed 10 selfloop flow, removed 20 redundant places. [2024-06-27 16:37:36,195 INFO L231 Difference]: Finished difference. Result has 569 places, 526 transitions, 8984 flow [2024-06-27 16:37:36,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8852, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=8984, PETRI_PLACES=569, PETRI_TRANSITIONS=526} [2024-06-27 16:37:36,196 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 547 predicate places. [2024-06-27 16:37:36,196 INFO L495 AbstractCegarLoop]: Abstraction has has 569 places, 526 transitions, 8984 flow [2024-06-27 16:37:36,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 states have internal predecessors, (139), 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 16:37:36,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:37:36,196 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:37:36,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2024-06-27 16:37:36,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:37:36,409 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:37:36,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:37:36,409 INFO L85 PathProgramCache]: Analyzing trace with hash -163421486, now seen corresponding path program 111 times [2024-06-27 16:37:36,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:37:36,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070455780] [2024-06-27 16:37:36,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:37:36,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:37:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:37:37,004 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:37:37,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:37:37,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070455780] [2024-06-27 16:37:37,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070455780] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:37:37,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869965354] [2024-06-27 16:37:37,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:37:37,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:37:37,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:37:37,006 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:37:37,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2024-06-27 16:37:37,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:37:37,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:37:37,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:37:37,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:37:37,592 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:37:37,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:37:37,716 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:37:37,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-06-27 16:37:37,790 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:37:37,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869965354] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:37:37,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:37:37,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 29 [2024-06-27 16:37:37,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800392273] [2024-06-27 16:37:37,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:37:37,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:37:37,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:37:37,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:37:37,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:37:37,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:37:37,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 526 transitions, 8984 flow. Second operand has 29 states, 29 states have (on average 4.758620689655173) internal successors, (138), 29 states have internal predecessors, (138), 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 16:37:37,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:37:37,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:37:37,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:37:39,583 INFO L124 PetriNetUnfolderBase]: 1848/3452 cut-off events. [2024-06-27 16:37:39,583 INFO L125 PetriNetUnfolderBase]: For 318022/318022 co-relation queries the response was YES. [2024-06-27 16:37:39,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44690 conditions, 3452 events. 1848/3452 cut-off events. For 318022/318022 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 23029 event pairs, 830 based on Foata normal form. 6/3456 useless extension candidates. Maximal degree in co-relation 44491. Up to 3266 conditions per place. [2024-06-27 16:37:39,649 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 471 selfloop transitions, 60 changer transitions 13/545 dead transitions. [2024-06-27 16:37:39,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 545 transitions, 10248 flow [2024-06-27 16:37:39,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 16:37:39,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 16:37:39,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 139 transitions. [2024-06-27 16:37:39,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2871900826446281 [2024-06-27 16:37:39,650 INFO L175 Difference]: Start difference. First operand has 569 places, 526 transitions, 8984 flow. Second operand 22 states and 139 transitions. [2024-06-27 16:37:39,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 545 transitions, 10248 flow [2024-06-27 16:37:41,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 545 transitions, 10102 flow, removed 16 selfloop flow, removed 18 redundant places. [2024-06-27 16:37:41,431 INFO L231 Difference]: Finished difference. Result has 569 places, 520 transitions, 8877 flow [2024-06-27 16:37:41,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8807, PETRI_DIFFERENCE_MINUEND_PLACES=546, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=8877, PETRI_PLACES=569, PETRI_TRANSITIONS=520} [2024-06-27 16:37:41,432 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 547 predicate places. [2024-06-27 16:37:41,432 INFO L495 AbstractCegarLoop]: Abstraction has has 569 places, 520 transitions, 8877 flow [2024-06-27 16:37:41,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.758620689655173) internal successors, (138), 29 states have internal predecessors, (138), 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 16:37:41,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:37:41,432 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:37:41,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2024-06-27 16:37:41,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:37:41,645 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:37:41,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:37:41,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1555297612, now seen corresponding path program 112 times [2024-06-27 16:37:41,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:37:41,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162625962] [2024-06-27 16:37:41,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:37:41,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:37:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:37:42,187 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:37:42,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:37:42,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162625962] [2024-06-27 16:37:42,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162625962] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:37:42,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557256327] [2024-06-27 16:37:42,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:37:42,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:37:42,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:37:42,189 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:37:42,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2024-06-27 16:37:42,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:37:42,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:37:42,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 16:37:42,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:37:42,718 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:37:42,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 45 [2024-06-27 16:37:42,758 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:37:42,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:37:42,873 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:37:42,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-06-27 16:37:42,931 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:37:42,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557256327] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:37:42,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:37:42,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2024-06-27 16:37:42,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287787748] [2024-06-27 16:37:42,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:37:42,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:37:42,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:37:42,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:37:42,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:37:42,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:37:42,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 520 transitions, 8877 flow. Second operand has 30 states, 30 states have (on average 4.666666666666667) internal successors, (140), 30 states have internal predecessors, (140), 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 16:37:42,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:37:42,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:37:42,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:37:44,572 INFO L124 PetriNetUnfolderBase]: 1833/3405 cut-off events. [2024-06-27 16:37:44,572 INFO L125 PetriNetUnfolderBase]: For 320477/320477 co-relation queries the response was YES. [2024-06-27 16:37:44,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44299 conditions, 3405 events. 1833/3405 cut-off events. For 320477/320477 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 22550 event pairs, 748 based on Foata normal form. 4/3407 useless extension candidates. Maximal degree in co-relation 44101. Up to 3046 conditions per place. [2024-06-27 16:37:44,637 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 463 selfloop transitions, 84 changer transitions 7/555 dead transitions. [2024-06-27 16:37:44,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 581 places, 555 transitions, 10635 flow [2024-06-27 16:37:44,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 16:37:44,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 16:37:44,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 159 transitions. [2024-06-27 16:37:44,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3142292490118577 [2024-06-27 16:37:44,638 INFO L175 Difference]: Start difference. First operand has 569 places, 520 transitions, 8877 flow. Second operand 23 states and 159 transitions. [2024-06-27 16:37:44,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 581 places, 555 transitions, 10635 flow [2024-06-27 16:37:46,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 563 places, 555 transitions, 10495 flow, removed 10 selfloop flow, removed 18 redundant places. [2024-06-27 16:37:46,346 INFO L231 Difference]: Finished difference. Result has 563 places, 516 transitions, 8868 flow [2024-06-27 16:37:46,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8718, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=8868, PETRI_PLACES=563, PETRI_TRANSITIONS=516} [2024-06-27 16:37:46,346 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 541 predicate places. [2024-06-27 16:37:46,346 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 516 transitions, 8868 flow [2024-06-27 16:37:46,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.666666666666667) internal successors, (140), 30 states have internal predecessors, (140), 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 16:37:46,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:37:46,347 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:37:46,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2024-06-27 16:37:46,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:37:46,556 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:37:46,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:37:46,557 INFO L85 PathProgramCache]: Analyzing trace with hash 710319194, now seen corresponding path program 113 times [2024-06-27 16:37:46,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:37:46,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793019323] [2024-06-27 16:37:46,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:37:46,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:37:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:37:47,153 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:37:47,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:37:47,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793019323] [2024-06-27 16:37:47,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793019323] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:37:47,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212696576] [2024-06-27 16:37:47,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:37:47,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:37:47,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:37:47,155 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:37:47,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2024-06-27 16:37:47,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:37:47,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:37:47,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 40 conjunts are in the unsatisfiable core [2024-06-27 16:37:47,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:37:47,823 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:37:47,823 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 52 treesize of output 34 [2024-06-27 16:37:47,871 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:37:47,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:37:48,020 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:37:48,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-06-27 16:37:48,095 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:37:48,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212696576] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:37:48,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:37:48,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 9] total 33 [2024-06-27 16:37:48,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721148745] [2024-06-27 16:37:48,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:37:48,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 16:37:48,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:37:48,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 16:37:48,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 16:37:48,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:37:48,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 516 transitions, 8868 flow. Second operand has 33 states, 33 states have (on average 4.787878787878788) internal successors, (158), 33 states have internal predecessors, (158), 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 16:37:48,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:37:48,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:37:48,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:37:49,808 INFO L124 PetriNetUnfolderBase]: 1812/3346 cut-off events. [2024-06-27 16:37:49,808 INFO L125 PetriNetUnfolderBase]: For 313870/313870 co-relation queries the response was YES. [2024-06-27 16:37:49,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43668 conditions, 3346 events. 1812/3346 cut-off events. For 313870/313870 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 21918 event pairs, 780 based on Foata normal form. 6/3350 useless extension candidates. Maximal degree in co-relation 43471. Up to 3112 conditions per place. [2024-06-27 16:37:49,877 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 458 selfloop transitions, 73 changer transitions 10/542 dead transitions. [2024-06-27 16:37:49,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 582 places, 542 transitions, 10305 flow [2024-06-27 16:37:49,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-06-27 16:37:49,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-06-27 16:37:49,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 158 transitions. [2024-06-27 16:37:49,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29924242424242425 [2024-06-27 16:37:49,879 INFO L175 Difference]: Start difference. First operand has 563 places, 516 transitions, 8868 flow. Second operand 24 states and 158 transitions. [2024-06-27 16:37:49,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 582 places, 542 transitions, 10305 flow [2024-06-27 16:37:52,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 542 transitions, 10107 flow, removed 13 selfloop flow, removed 21 redundant places. [2024-06-27 16:37:52,044 INFO L231 Difference]: Finished difference. Result has 561 places, 509 transitions, 8742 flow [2024-06-27 16:37:52,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8617, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=8742, PETRI_PLACES=561, PETRI_TRANSITIONS=509} [2024-06-27 16:37:52,061 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 539 predicate places. [2024-06-27 16:37:52,061 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 509 transitions, 8742 flow [2024-06-27 16:37:52,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.787878787878788) internal successors, (158), 33 states have internal predecessors, (158), 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 16:37:52,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:37:52,061 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:37:52,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2024-06-27 16:37:52,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:37:52,262 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:37:52,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:37:52,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1314665515, now seen corresponding path program 114 times [2024-06-27 16:37:52,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:37:52,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858798288] [2024-06-27 16:37:52,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:37:52,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:37:52,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:37:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:37:52,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:37:52,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858798288] [2024-06-27 16:37:52,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858798288] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:37:52,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644190027] [2024-06-27 16:37:52,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:37:52,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:37:52,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:37:52,903 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:37:52,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2024-06-27 16:37:53,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 16:37:53,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:37:53,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:37:53,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:37:53,477 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:37:53,478 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 65 treesize of output 41 [2024-06-27 16:37:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:37:53,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:37:53,636 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:37:53,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-06-27 16:37:53,713 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:37:53,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644190027] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:37:53,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:37:53,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 29 [2024-06-27 16:37:53,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135901233] [2024-06-27 16:37:53,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:37:53,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:37:53,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:37:53,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:37:53,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:37:53,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:37:53,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 509 transitions, 8742 flow. Second operand has 29 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 states have internal predecessors, (139), 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 16:37:53,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:37:53,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:37:53,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:37:55,450 INFO L124 PetriNetUnfolderBase]: 1791/3297 cut-off events. [2024-06-27 16:37:55,451 INFO L125 PetriNetUnfolderBase]: For 305775/305775 co-relation queries the response was YES. [2024-06-27 16:37:55,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42911 conditions, 3297 events. 1791/3297 cut-off events. For 305775/305775 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 21413 event pairs, 782 based on Foata normal form. 6/3301 useless extension candidates. Maximal degree in co-relation 42714. Up to 3080 conditions per place. [2024-06-27 16:37:55,514 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 453 selfloop transitions, 74 changer transitions 6/534 dead transitions. [2024-06-27 16:37:55,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 534 transitions, 10203 flow [2024-06-27 16:37:55,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-06-27 16:37:55,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-06-27 16:37:55,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 153 transitions. [2024-06-27 16:37:55,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2897727272727273 [2024-06-27 16:37:55,516 INFO L175 Difference]: Start difference. First operand has 561 places, 509 transitions, 8742 flow. Second operand 24 states and 153 transitions. [2024-06-27 16:37:55,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 534 transitions, 10203 flow [2024-06-27 16:37:57,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 534 transitions, 9971 flow, removed 23 selfloop flow, removed 24 redundant places. [2024-06-27 16:37:57,249 INFO L231 Difference]: Finished difference. Result has 556 places, 505 transitions, 8619 flow [2024-06-27 16:37:57,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8487, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=8619, PETRI_PLACES=556, PETRI_TRANSITIONS=505} [2024-06-27 16:37:57,250 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 534 predicate places. [2024-06-27 16:37:57,250 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 505 transitions, 8619 flow [2024-06-27 16:37:57,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 states have internal predecessors, (139), 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 16:37:57,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:37:57,250 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:37:57,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2024-06-27 16:37:57,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2024-06-27 16:37:57,463 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:37:57,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:37:57,463 INFO L85 PathProgramCache]: Analyzing trace with hash -62667883, now seen corresponding path program 115 times [2024-06-27 16:37:57,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:37:57,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869302153] [2024-06-27 16:37:57,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:37:57,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:37:57,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:37:58,028 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:37:58,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:37:58,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869302153] [2024-06-27 16:37:58,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869302153] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:37:58,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998931377] [2024-06-27 16:37:58,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:37:58,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:37:58,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:37:58,029 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:37:58,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2024-06-27 16:37:58,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:37:58,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:37:58,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:37:58,573 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:37:58,573 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 58 treesize of output 34 [2024-06-27 16:37:58,609 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:37:58,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:37:58,743 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:37:58,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-06-27 16:37:58,796 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:37:58,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998931377] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:37:58,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:37:58,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-06-27 16:37:58,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72756143] [2024-06-27 16:37:58,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:37:58,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:37:58,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:37:58,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:37:58,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:37:58,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:37:58,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 505 transitions, 8619 flow. Second operand has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 29 states have internal predecessors, (137), 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 16:37:58,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:37:58,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:37:58,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:38:00,740 INFO L124 PetriNetUnfolderBase]: 1813/3329 cut-off events. [2024-06-27 16:38:00,740 INFO L125 PetriNetUnfolderBase]: For 308931/308931 co-relation queries the response was YES. [2024-06-27 16:38:00,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43508 conditions, 3329 events. 1813/3329 cut-off events. For 308931/308931 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 21619 event pairs, 745 based on Foata normal form. 8/3335 useless extension candidates. Maximal degree in co-relation 43312. Up to 2998 conditions per place. [2024-06-27 16:38:00,806 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 469 selfloop transitions, 87 changer transitions 0/557 dead transitions. [2024-06-27 16:38:00,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 581 places, 557 transitions, 11232 flow [2024-06-27 16:38:00,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-06-27 16:38:00,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-06-27 16:38:00,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 197 transitions. [2024-06-27 16:38:00,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30877742946708464 [2024-06-27 16:38:00,807 INFO L175 Difference]: Start difference. First operand has 556 places, 505 transitions, 8619 flow. Second operand 29 states and 197 transitions. [2024-06-27 16:38:00,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 581 places, 557 transitions, 11232 flow [2024-06-27 16:38:02,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 557 transitions, 10998 flow, removed 22 selfloop flow, removed 24 redundant places. [2024-06-27 16:38:02,527 INFO L231 Difference]: Finished difference. Result has 559 places, 511 transitions, 8834 flow [2024-06-27 16:38:02,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8393, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=8834, PETRI_PLACES=559, PETRI_TRANSITIONS=511} [2024-06-27 16:38:02,527 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 537 predicate places. [2024-06-27 16:38:02,528 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 511 transitions, 8834 flow [2024-06-27 16:38:02,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 29 states have internal predecessors, (137), 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 16:38:02,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:38:02,528 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:38:02,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2024-06-27 16:38:02,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2024-06-27 16:38:02,740 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:38:02,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:38:02,741 INFO L85 PathProgramCache]: Analyzing trace with hash 336519087, now seen corresponding path program 116 times [2024-06-27 16:38:02,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:38:02,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995204206] [2024-06-27 16:38:02,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:38:02,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:38:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:38:03,324 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:38:03,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:38:03,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995204206] [2024-06-27 16:38:03,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995204206] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:38:03,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414268999] [2024-06-27 16:38:03,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:38:03,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:38:03,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:38:03,326 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:38:03,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2024-06-27 16:38:03,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:38:03,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:38:03,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:38:03,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:38:03,919 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:38:03,919 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 65 treesize of output 41 [2024-06-27 16:38:03,950 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:38:03,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:38:04,057 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:38:04,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-06-27 16:38:04,139 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:38:04,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414268999] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:38:04,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:38:04,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 30 [2024-06-27 16:38:04,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131397502] [2024-06-27 16:38:04,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:38:04,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:38:04,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:38:04,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:38:04,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:38:04,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:38:04,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 511 transitions, 8834 flow. Second operand has 30 states, 30 states have (on average 4.8) internal successors, (144), 30 states have internal predecessors, (144), 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 16:38:04,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:38:04,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:38:04,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:38:05,790 INFO L124 PetriNetUnfolderBase]: 1803/3310 cut-off events. [2024-06-27 16:38:05,790 INFO L125 PetriNetUnfolderBase]: For 304160/304160 co-relation queries the response was YES. [2024-06-27 16:38:05,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43127 conditions, 3310 events. 1803/3310 cut-off events. For 304160/304160 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 21481 event pairs, 782 based on Foata normal form. 6/3314 useless extension candidates. Maximal degree in co-relation 42930. Up to 3084 conditions per place. [2024-06-27 16:38:05,852 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 463 selfloop transitions, 73 changer transitions 6/543 dead transitions. [2024-06-27 16:38:05,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 543 transitions, 10436 flow [2024-06-27 16:38:05,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 16:38:05,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 16:38:05,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 165 transitions. [2024-06-27 16:38:05,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3 [2024-06-27 16:38:05,853 INFO L175 Difference]: Start difference. First operand has 559 places, 511 transitions, 8834 flow. Second operand 25 states and 165 transitions. [2024-06-27 16:38:05,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 543 transitions, 10436 flow [2024-06-27 16:38:07,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 543 transitions, 10114 flow, removed 76 selfloop flow, removed 25 redundant places. [2024-06-27 16:38:07,517 INFO L231 Difference]: Finished difference. Result has 559 places, 509 transitions, 8640 flow [2024-06-27 16:38:07,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8500, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=8640, PETRI_PLACES=559, PETRI_TRANSITIONS=509} [2024-06-27 16:38:07,518 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 537 predicate places. [2024-06-27 16:38:07,518 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 509 transitions, 8640 flow [2024-06-27 16:38:07,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.8) internal successors, (144), 30 states have internal predecessors, (144), 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 16:38:07,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:38:07,518 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:38:07,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2024-06-27 16:38:07,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2024-06-27 16:38:07,731 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:38:07,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:38:07,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1211976561, now seen corresponding path program 117 times [2024-06-27 16:38:07,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:38:07,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047802735] [2024-06-27 16:38:07,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:38:07,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:38:07,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:38:08,248 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:38:08,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:38:08,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047802735] [2024-06-27 16:38:08,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047802735] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:38:08,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275638728] [2024-06-27 16:38:08,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:38:08,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:38:08,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:38:08,250 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:38:08,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2024-06-27 16:38:08,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:38:08,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:38:08,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:38:08,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:38:08,848 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:38:08,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:38:08,985 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:38:08,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-06-27 16:38:09,066 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:38:09,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275638728] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:38:09,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:38:09,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 28 [2024-06-27 16:38:09,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538542784] [2024-06-27 16:38:09,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:38:09,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-06-27 16:38:09,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:38:09,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-06-27 16:38:09,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2024-06-27 16:38:09,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:38:09,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 509 transitions, 8640 flow. Second operand has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 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 16:38:09,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:38:09,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:38:09,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:38:10,516 INFO L124 PetriNetUnfolderBase]: 1833/3344 cut-off events. [2024-06-27 16:38:10,516 INFO L125 PetriNetUnfolderBase]: For 306683/306683 co-relation queries the response was YES. [2024-06-27 16:38:10,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43800 conditions, 3344 events. 1833/3344 cut-off events. For 306683/306683 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 21598 event pairs, 778 based on Foata normal form. 8/3350 useless extension candidates. Maximal degree in co-relation 43603. Up to 3093 conditions per place. [2024-06-27 16:38:10,577 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 474 selfloop transitions, 69 changer transitions 1/545 dead transitions. [2024-06-27 16:38:10,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 545 transitions, 10690 flow [2024-06-27 16:38:10,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 16:38:10,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 16:38:10,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 145 transitions. [2024-06-27 16:38:10,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29958677685950413 [2024-06-27 16:38:10,578 INFO L175 Difference]: Start difference. First operand has 559 places, 509 transitions, 8640 flow. Second operand 22 states and 145 transitions. [2024-06-27 16:38:10,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 545 transitions, 10690 flow [2024-06-27 16:38:12,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 545 transitions, 10508 flow, removed 13 selfloop flow, removed 26 redundant places. [2024-06-27 16:38:12,443 INFO L231 Difference]: Finished difference. Result has 553 places, 514 transitions, 8765 flow [2024-06-27 16:38:12,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8452, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=8765, PETRI_PLACES=553, PETRI_TRANSITIONS=514} [2024-06-27 16:38:12,443 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 531 predicate places. [2024-06-27 16:38:12,443 INFO L495 AbstractCegarLoop]: Abstraction has has 553 places, 514 transitions, 8765 flow [2024-06-27 16:38:12,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 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 16:38:12,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:38:12,444 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:38:12,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2024-06-27 16:38:12,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2024-06-27 16:38:12,656 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:38:12,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:38:12,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1602556809, now seen corresponding path program 118 times [2024-06-27 16:38:12,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:38:12,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392623509] [2024-06-27 16:38:12,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:38:12,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:38:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:38:13,224 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:38:13,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:38:13,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392623509] [2024-06-27 16:38:13,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392623509] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:38:13,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720338114] [2024-06-27 16:38:13,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:38:13,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:38:13,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:38:13,225 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:38:13,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2024-06-27 16:38:13,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:38:13,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:38:13,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:38:13,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:38:13,793 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:38:13,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:38:13,914 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:38:13,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-06-27 16:38:13,990 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:38:13,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720338114] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:38:13,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:38:13,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2024-06-27 16:38:13,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565065877] [2024-06-27 16:38:13,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:38:13,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:38:13,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:38:13,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:38:13,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:38:13,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:38:13,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 553 places, 514 transitions, 8765 flow. Second operand has 30 states, 30 states have (on average 4.7) internal successors, (141), 30 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:38:13,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:38:13,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:38:13,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:38:15,517 INFO L124 PetriNetUnfolderBase]: 1840/3374 cut-off events. [2024-06-27 16:38:15,517 INFO L125 PetriNetUnfolderBase]: For 307658/307658 co-relation queries the response was YES. [2024-06-27 16:38:15,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44045 conditions, 3374 events. 1840/3374 cut-off events. For 307658/307658 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 21968 event pairs, 806 based on Foata normal form. 6/3378 useless extension candidates. Maximal degree in co-relation 43848. Up to 3178 conditions per place. [2024-06-27 16:38:15,578 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 478 selfloop transitions, 55 changer transitions 13/547 dead transitions. [2024-06-27 16:38:15,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 547 transitions, 10396 flow [2024-06-27 16:38:15,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 16:38:15,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 16:38:15,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 139 transitions. [2024-06-27 16:38:15,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3008658008658009 [2024-06-27 16:38:15,579 INFO L175 Difference]: Start difference. First operand has 553 places, 514 transitions, 8765 flow. Second operand 21 states and 139 transitions. [2024-06-27 16:38:15,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 547 transitions, 10396 flow [2024-06-27 16:38:17,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 547 transitions, 10268 flow, removed 2 selfloop flow, removed 18 redundant places. [2024-06-27 16:38:17,228 INFO L231 Difference]: Finished difference. Result has 558 places, 516 transitions, 8829 flow [2024-06-27 16:38:17,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8637, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=8829, PETRI_PLACES=558, PETRI_TRANSITIONS=516} [2024-06-27 16:38:17,228 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 536 predicate places. [2024-06-27 16:38:17,229 INFO L495 AbstractCegarLoop]: Abstraction has has 558 places, 516 transitions, 8829 flow [2024-06-27 16:38:17,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.7) internal successors, (141), 30 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:38:17,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:38:17,229 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:38:17,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2024-06-27 16:38:17,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:38:17,433 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:38:17,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:38:17,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1203005491, now seen corresponding path program 119 times [2024-06-27 16:38:17,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:38:17,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41797954] [2024-06-27 16:38:17,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:38:17,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:38:17,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:38:18,147 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:38:18,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:38:18,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41797954] [2024-06-27 16:38:18,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41797954] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:38:18,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394962795] [2024-06-27 16:38:18,148 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:38:18,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:38:18,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:38:18,149 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:38:18,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2024-06-27 16:38:18,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:38:18,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:38:18,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 16:38:18,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:38:18,846 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:38:18,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:38:18,974 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:38:18,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-06-27 16:38:19,071 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:38:19,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394962795] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:38:19,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:38:19,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 9] total 33 [2024-06-27 16:38:19,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490176367] [2024-06-27 16:38:19,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:38:19,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 16:38:19,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:38:19,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 16:38:19,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=914, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 16:38:19,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:38:19,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 558 places, 516 transitions, 8829 flow. Second operand has 33 states, 33 states have (on average 4.848484848484849) internal successors, (160), 33 states have internal predecessors, (160), 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 16:38:19,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:38:19,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:38:19,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:38:20,812 INFO L124 PetriNetUnfolderBase]: 1820/3334 cut-off events. [2024-06-27 16:38:20,812 INFO L125 PetriNetUnfolderBase]: For 311715/311715 co-relation queries the response was YES. [2024-06-27 16:38:20,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43957 conditions, 3334 events. 1820/3334 cut-off events. For 311715/311715 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 21614 event pairs, 784 based on Foata normal form. 9/3341 useless extension candidates. Maximal degree in co-relation 43755. Up to 3110 conditions per place. [2024-06-27 16:38:20,886 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 478 selfloop transitions, 59 changer transitions 15/553 dead transitions. [2024-06-27 16:38:20,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 553 transitions, 10702 flow [2024-06-27 16:38:20,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 16:38:20,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 16:38:20,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 150 transitions. [2024-06-27 16:38:20,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30991735537190085 [2024-06-27 16:38:20,888 INFO L175 Difference]: Start difference. First operand has 558 places, 516 transitions, 8829 flow. Second operand 22 states and 150 transitions. [2024-06-27 16:38:20,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 553 transitions, 10702 flow [2024-06-27 16:38:22,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 553 transitions, 10529 flow, removed 32 selfloop flow, removed 17 redundant places. [2024-06-27 16:38:22,687 INFO L231 Difference]: Finished difference. Result has 563 places, 517 transitions, 8849 flow [2024-06-27 16:38:22,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8660, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=8849, PETRI_PLACES=563, PETRI_TRANSITIONS=517} [2024-06-27 16:38:22,688 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 541 predicate places. [2024-06-27 16:38:22,688 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 517 transitions, 8849 flow [2024-06-27 16:38:22,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.848484848484849) internal successors, (160), 33 states have internal predecessors, (160), 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 16:38:22,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:38:22,689 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:38:22,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2024-06-27 16:38:22,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:38:22,902 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:38:22,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:38:22,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1969015861, now seen corresponding path program 120 times [2024-06-27 16:38:22,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:38:22,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654998639] [2024-06-27 16:38:22,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:38:22,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:38:22,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:38:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:38:23,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:38:23,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654998639] [2024-06-27 16:38:23,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654998639] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:38:23,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351359904] [2024-06-27 16:38:23,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:38:23,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:38:23,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:38:23,426 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:38:23,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2024-06-27 16:38:23,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 16:38:23,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:38:23,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 35 conjunts are in the unsatisfiable core [2024-06-27 16:38:23,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:38:24,040 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 16:38:24,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-06-27 16:38:24,042 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:38:24,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:38:24,173 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:38:24,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-06-27 16:38:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:38:24,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351359904] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:38:24,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:38:24,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 27 [2024-06-27 16:38:24,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674819006] [2024-06-27 16:38:24,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:38:24,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-27 16:38:24,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:38:24,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-27 16:38:24,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2024-06-27 16:38:24,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:38:24,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 517 transitions, 8849 flow. Second operand has 27 states, 27 states have (on average 4.851851851851852) internal successors, (131), 27 states have internal predecessors, (131), 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 16:38:24,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:38:24,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:38:24,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:38:25,709 INFO L124 PetriNetUnfolderBase]: 1818/3313 cut-off events. [2024-06-27 16:38:25,709 INFO L125 PetriNetUnfolderBase]: For 320215/320215 co-relation queries the response was YES. [2024-06-27 16:38:25,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44186 conditions, 3313 events. 1818/3313 cut-off events. For 320215/320215 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 21317 event pairs, 670 based on Foata normal form. 4/3315 useless extension candidates. Maximal degree in co-relation 43982. Up to 2854 conditions per place. [2024-06-27 16:38:25,771 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 440 selfloop transitions, 97 changer transitions 0/538 dead transitions. [2024-06-27 16:38:25,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 538 transitions, 10502 flow [2024-06-27 16:38:25,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 16:38:25,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 16:38:25,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 108 transitions. [2024-06-27 16:38:25,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3068181818181818 [2024-06-27 16:38:25,773 INFO L175 Difference]: Start difference. First operand has 563 places, 517 transitions, 8849 flow. Second operand 16 states and 108 transitions. [2024-06-27 16:38:25,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 538 transitions, 10502 flow [2024-06-27 16:38:27,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 538 transitions, 10322 flow, removed 32 selfloop flow, removed 18 redundant places. [2024-06-27 16:38:27,452 INFO L231 Difference]: Finished difference. Result has 559 places, 519 transitions, 8949 flow [2024-06-27 16:38:27,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8669, PETRI_DIFFERENCE_MINUEND_PLACES=542, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8949, PETRI_PLACES=559, PETRI_TRANSITIONS=519} [2024-06-27 16:38:27,452 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 537 predicate places. [2024-06-27 16:38:27,452 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 519 transitions, 8949 flow [2024-06-27 16:38:27,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.851851851851852) internal successors, (131), 27 states have internal predecessors, (131), 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 16:38:27,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:38:27,453 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:38:27,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2024-06-27 16:38:27,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2024-06-27 16:38:27,665 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:38:27,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:38:27,665 INFO L85 PathProgramCache]: Analyzing trace with hash 608649047, now seen corresponding path program 121 times [2024-06-27 16:38:27,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:38:27,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94673392] [2024-06-27 16:38:27,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:38:27,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:38:27,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:38:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:38:28,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:38:28,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94673392] [2024-06-27 16:38:28,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94673392] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:38:28,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665250745] [2024-06-27 16:38:28,187 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:38:28,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:38:28,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:38:28,188 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:38:28,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2024-06-27 16:38:28,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:38:28,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:38:28,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:38:28,804 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-06-27 16:38:28,804 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 33 treesize of output 9 [2024-06-27 16:38:28,806 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:38:28,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:38:28,952 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:38:28,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-06-27 16:38:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:38:28,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665250745] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:38:28,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:38:28,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 28 [2024-06-27 16:38:28,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430962593] [2024-06-27 16:38:28,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:38:28,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-06-27 16:38:28,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:38:28,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-06-27 16:38:28,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2024-06-27 16:38:28,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:38:28,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 519 transitions, 8949 flow. Second operand has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 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 16:38:28,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:38:28,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:38:28,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:38:30,510 INFO L124 PetriNetUnfolderBase]: 1830/3333 cut-off events. [2024-06-27 16:38:30,510 INFO L125 PetriNetUnfolderBase]: For 326680/326680 co-relation queries the response was YES. [2024-06-27 16:38:30,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44779 conditions, 3333 events. 1830/3333 cut-off events. For 326680/326680 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 21452 event pairs, 665 based on Foata normal form. 4/3335 useless extension candidates. Maximal degree in co-relation 44574. Up to 2851 conditions per place. [2024-06-27 16:38:30,572 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 441 selfloop transitions, 104 changer transitions 0/546 dead transitions. [2024-06-27 16:38:30,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 577 places, 546 transitions, 10821 flow [2024-06-27 16:38:30,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 16:38:30,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 16:38:30,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 129 transitions. [2024-06-27 16:38:30,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30861244019138756 [2024-06-27 16:38:30,573 INFO L175 Difference]: Start difference. First operand has 559 places, 519 transitions, 8949 flow. Second operand 19 states and 129 transitions. [2024-06-27 16:38:30,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 577 places, 546 transitions, 10821 flow [2024-06-27 16:38:32,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 546 transitions, 10560 flow, removed 34 selfloop flow, removed 13 redundant places. [2024-06-27 16:38:32,292 INFO L231 Difference]: Finished difference. Result has 566 places, 522 transitions, 9031 flow [2024-06-27 16:38:32,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8717, PETRI_DIFFERENCE_MINUEND_PLACES=546, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=9031, PETRI_PLACES=566, PETRI_TRANSITIONS=522} [2024-06-27 16:38:32,293 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 544 predicate places. [2024-06-27 16:38:32,293 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 522 transitions, 9031 flow [2024-06-27 16:38:32,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 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 16:38:32,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:38:32,293 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:38:32,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2024-06-27 16:38:32,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2024-06-27 16:38:32,506 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:38:32,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:38:32,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1180918629, now seen corresponding path program 122 times [2024-06-27 16:38:32,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:38:32,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972799981] [2024-06-27 16:38:32,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:38:32,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:38:32,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:38:33,067 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:38:33,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:38:33,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972799981] [2024-06-27 16:38:33,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972799981] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:38:33,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46234168] [2024-06-27 16:38:33,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:38:33,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:38:33,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:38:33,088 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:38:33,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2024-06-27 16:38:33,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:38:33,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:38:33,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:38:33,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:38:33,698 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:38:33,698 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 65 treesize of output 41 [2024-06-27 16:38:33,737 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:38:33,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:38:33,892 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:38:33,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-06-27 16:38:33,953 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:38:33,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46234168] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:38:33,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:38:33,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 30 [2024-06-27 16:38:33,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973582821] [2024-06-27 16:38:33,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:38:33,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:38:33,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:38:33,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:38:33,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:38:33,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:38:33,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 522 transitions, 9031 flow. Second operand has 30 states, 30 states have (on average 4.7) internal successors, (141), 30 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:38:33,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:38:33,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:38:33,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:38:35,538 INFO L124 PetriNetUnfolderBase]: 1858/3386 cut-off events. [2024-06-27 16:38:35,538 INFO L125 PetriNetUnfolderBase]: For 335629/335629 co-relation queries the response was YES. [2024-06-27 16:38:35,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45928 conditions, 3386 events. 1858/3386 cut-off events. For 335629/335629 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 21892 event pairs, 659 based on Foata normal form. 4/3388 useless extension candidates. Maximal degree in co-relation 45722. Up to 2824 conditions per place. [2024-06-27 16:38:35,604 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 441 selfloop transitions, 115 changer transitions 2/559 dead transitions. [2024-06-27 16:38:35,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 586 places, 559 transitions, 11160 flow [2024-06-27 16:38:35,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 16:38:35,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 16:38:35,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 147 transitions. [2024-06-27 16:38:35,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-06-27 16:38:35,605 INFO L175 Difference]: Start difference. First operand has 566 places, 522 transitions, 9031 flow. Second operand 21 states and 147 transitions. [2024-06-27 16:38:35,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 586 places, 559 transitions, 11160 flow [2024-06-27 16:38:37,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 559 transitions, 10887 flow, removed 34 selfloop flow, removed 16 redundant places. [2024-06-27 16:38:37,360 INFO L231 Difference]: Finished difference. Result has 572 places, 527 transitions, 9247 flow [2024-06-27 16:38:37,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8792, PETRI_DIFFERENCE_MINUEND_PLACES=550, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=9247, PETRI_PLACES=572, PETRI_TRANSITIONS=527} [2024-06-27 16:38:37,361 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 550 predicate places. [2024-06-27 16:38:37,361 INFO L495 AbstractCegarLoop]: Abstraction has has 572 places, 527 transitions, 9247 flow [2024-06-27 16:38:37,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.7) internal successors, (141), 30 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:38:37,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:38:37,361 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:38:37,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2024-06-27 16:38:37,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:38:37,575 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:38:37,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:38:37,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1029146459, now seen corresponding path program 123 times [2024-06-27 16:38:37,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:38:37,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387733719] [2024-06-27 16:38:37,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:38:37,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:38:37,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:38:38,116 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:38:38,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:38:38,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387733719] [2024-06-27 16:38:38,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387733719] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:38:38,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481997895] [2024-06-27 16:38:38,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:38:38,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:38:38,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:38:38,122 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:38:38,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2024-06-27 16:38:38,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:38:38,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:38:38,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 41 conjunts are in the unsatisfiable core [2024-06-27 16:38:38,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:38:38,741 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:38:38,741 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 65 treesize of output 41 [2024-06-27 16:38:38,775 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:38:38,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:38:38,880 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:38:38,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-06-27 16:38:38,956 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:38:38,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481997895] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:38:38,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:38:38,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 30 [2024-06-27 16:38:38,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643273444] [2024-06-27 16:38:38,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:38:38,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:38:38,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:38:38,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:38:38,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:38:38,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:38:38,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 527 transitions, 9247 flow. Second operand has 30 states, 30 states have (on average 4.766666666666667) internal successors, (143), 30 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 16:38:38,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:38:38,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:38:38,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:38:41,137 INFO L124 PetriNetUnfolderBase]: 1876/3440 cut-off events. [2024-06-27 16:38:41,138 INFO L125 PetriNetUnfolderBase]: For 355776/355776 co-relation queries the response was YES. [2024-06-27 16:38:41,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47431 conditions, 3440 events. 1876/3440 cut-off events. For 355776/355776 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 22501 event pairs, 623 based on Foata normal form. 33/3471 useless extension candidates. Maximal degree in co-relation 47224. Up to 2704 conditions per place. [2024-06-27 16:38:41,206 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 460 selfloop transitions, 136 changer transitions 20/617 dead transitions. [2024-06-27 16:38:41,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 606 places, 617 transitions, 13365 flow [2024-06-27 16:38:41,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-06-27 16:38:41,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-06-27 16:38:41,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 252 transitions. [2024-06-27 16:38:41,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32727272727272727 [2024-06-27 16:38:41,208 INFO L175 Difference]: Start difference. First operand has 572 places, 527 transitions, 9247 flow. Second operand 35 states and 252 transitions. [2024-06-27 16:38:41,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 606 places, 617 transitions, 13365 flow [2024-06-27 16:38:43,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 617 transitions, 13039 flow, removed 55 selfloop flow, removed 17 redundant places. [2024-06-27 16:38:43,194 INFO L231 Difference]: Finished difference. Result has 597 places, 540 transitions, 10094 flow [2024-06-27 16:38:43,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8895, PETRI_DIFFERENCE_MINUEND_PLACES=555, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=10094, PETRI_PLACES=597, PETRI_TRANSITIONS=540} [2024-06-27 16:38:43,195 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 575 predicate places. [2024-06-27 16:38:43,195 INFO L495 AbstractCegarLoop]: Abstraction has has 597 places, 540 transitions, 10094 flow [2024-06-27 16:38:43,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.766666666666667) internal successors, (143), 30 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 16:38:43,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:38:43,196 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:38:43,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2024-06-27 16:38:43,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:38:43,402 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:38:43,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:38:43,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1204961035, now seen corresponding path program 124 times [2024-06-27 16:38:43,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:38:43,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910572659] [2024-06-27 16:38:43,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:38:43,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:38:43,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:38:43,950 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:38:43,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:38:43,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910572659] [2024-06-27 16:38:43,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910572659] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:38:43,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557690513] [2024-06-27 16:38:43,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:38:43,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:38:43,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:38:43,953 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:38:43,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2024-06-27 16:38:44,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:38:44,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:38:44,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:38:44,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:38:44,522 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:38:44,523 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 58 treesize of output 34 [2024-06-27 16:38:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:38:44,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:38:44,695 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:38:44,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-06-27 16:38:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:38:44,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557690513] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:38:44,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:38:44,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-06-27 16:38:44,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175087134] [2024-06-27 16:38:44,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:38:44,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:38:44,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:38:44,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:38:44,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:38:44,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:38:44,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 597 places, 540 transitions, 10094 flow. Second operand has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 29 states have internal predecessors, (137), 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 16:38:44,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:38:44,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:38:44,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:38:46,613 INFO L124 PetriNetUnfolderBase]: 1886/3477 cut-off events. [2024-06-27 16:38:46,614 INFO L125 PetriNetUnfolderBase]: For 410845/410845 co-relation queries the response was YES. [2024-06-27 16:38:46,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49924 conditions, 3477 events. 1886/3477 cut-off events. For 410845/410845 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 22889 event pairs, 661 based on Foata normal form. 12/3487 useless extension candidates. Maximal degree in co-relation 49709. Up to 2873 conditions per place. [2024-06-27 16:38:46,697 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 474 selfloop transitions, 119 changer transitions 12/606 dead transitions. [2024-06-27 16:38:46,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 606 transitions, 13059 flow [2024-06-27 16:38:46,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-06-27 16:38:46,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-06-27 16:38:46,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 210 transitions. [2024-06-27 16:38:46,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3409090909090909 [2024-06-27 16:38:46,698 INFO L175 Difference]: Start difference. First operand has 597 places, 540 transitions, 10094 flow. Second operand 28 states and 210 transitions. [2024-06-27 16:38:46,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 606 transitions, 13059 flow [2024-06-27 16:38:49,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 606 transitions, 12094 flow, removed 417 selfloop flow, removed 23 redundant places. [2024-06-27 16:38:49,218 INFO L231 Difference]: Finished difference. Result has 604 places, 544 transitions, 9678 flow [2024-06-27 16:38:49,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9165, PETRI_DIFFERENCE_MINUEND_PLACES=571, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=9678, PETRI_PLACES=604, PETRI_TRANSITIONS=544} [2024-06-27 16:38:49,219 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 582 predicate places. [2024-06-27 16:38:49,219 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 544 transitions, 9678 flow [2024-06-27 16:38:49,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 29 states have internal predecessors, (137), 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 16:38:49,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:38:49,219 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:38:49,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2024-06-27 16:38:49,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:38:49,432 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:38:49,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:38:49,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1498135073, now seen corresponding path program 125 times [2024-06-27 16:38:49,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:38:49,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180571713] [2024-06-27 16:38:49,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:38:49,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:38:49,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:38:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:38:49,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:38:49,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180571713] [2024-06-27 16:38:49,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180571713] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:38:49,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756962839] [2024-06-27 16:38:49,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:38:49,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:38:49,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:38:49,943 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:38:49,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2024-06-27 16:38:50,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:38:50,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:38:50,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:38:50,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:38:50,676 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:38:50,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:38:50,817 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-06-27 16:38:50,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-06-27 16:38:50,852 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:38:50,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756962839] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:38:50,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:38:50,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 9] total 33 [2024-06-27 16:38:50,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276262553] [2024-06-27 16:38:50,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:38:50,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 16:38:50,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:38:50,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 16:38:50,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 16:38:50,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:38:50,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 544 transitions, 9678 flow. Second operand has 33 states, 33 states have (on average 4.848484848484849) internal successors, (160), 33 states have internal predecessors, (160), 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 16:38:50,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:38:50,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:38:50,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:38:52,652 INFO L124 PetriNetUnfolderBase]: 1888/3473 cut-off events. [2024-06-27 16:38:52,653 INFO L125 PetriNetUnfolderBase]: For 401849/401849 co-relation queries the response was YES. [2024-06-27 16:38:52,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49225 conditions, 3473 events. 1888/3473 cut-off events. For 401849/401849 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 22759 event pairs, 143 based on Foata normal form. 4/3475 useless extension candidates. Maximal degree in co-relation 49009. Up to 2042 conditions per place. [2024-06-27 16:38:52,731 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 385 selfloop transitions, 194 changer transitions 1/581 dead transitions. [2024-06-27 16:38:52,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 623 places, 581 transitions, 12066 flow [2024-06-27 16:38:52,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 16:38:52,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 16:38:52,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 149 transitions. [2024-06-27 16:38:52,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30785123966942146 [2024-06-27 16:38:52,733 INFO L175 Difference]: Start difference. First operand has 604 places, 544 transitions, 9678 flow. Second operand 22 states and 149 transitions. [2024-06-27 16:38:52,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 623 places, 581 transitions, 12066 flow [2024-06-27 16:38:54,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 603 places, 581 transitions, 11725 flow, removed 85 selfloop flow, removed 20 redundant places. [2024-06-27 16:38:55,006 INFO L231 Difference]: Finished difference. Result has 604 places, 546 transitions, 9814 flow [2024-06-27 16:38:55,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9337, PETRI_DIFFERENCE_MINUEND_PLACES=582, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=9814, PETRI_PLACES=604, PETRI_TRANSITIONS=546} [2024-06-27 16:38:55,007 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 582 predicate places. [2024-06-27 16:38:55,007 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 546 transitions, 9814 flow [2024-06-27 16:38:55,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.848484848484849) internal successors, (160), 33 states have internal predecessors, (160), 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 16:38:55,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:38:55,007 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:38:55,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2024-06-27 16:38:55,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2024-06-27 16:38:55,221 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:38:55,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:38:55,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1420452794, now seen corresponding path program 126 times [2024-06-27 16:38:55,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:38:55,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358479069] [2024-06-27 16:38:55,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:38:55,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:38:55,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:38:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:38:55,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:38:55,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358479069] [2024-06-27 16:38:55,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358479069] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:38:55,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286387404] [2024-06-27 16:38:55,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:38:55,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:38:55,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:38:55,842 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:38:55,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2024-06-27 16:38:56,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 16:38:56,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:38:56,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 35 conjunts are in the unsatisfiable core [2024-06-27 16:38:56,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:38:56,483 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:38:56,484 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 46 treesize of output 30 [2024-06-27 16:38:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:38:56,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:38:56,652 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:38:56,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-06-27 16:38:56,721 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:38:56,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286387404] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:38:56,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:38:56,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 28 [2024-06-27 16:38:56,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286977200] [2024-06-27 16:38:56,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:38:56,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-06-27 16:38:56,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:38:56,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-06-27 16:38:56,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2024-06-27 16:38:56,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:38:56,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 546 transitions, 9814 flow. Second operand has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 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 16:38:56,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:38:56,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:38:56,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:38:58,436 INFO L124 PetriNetUnfolderBase]: 1920/3541 cut-off events. [2024-06-27 16:38:58,437 INFO L125 PetriNetUnfolderBase]: For 434862/434862 co-relation queries the response was YES. [2024-06-27 16:38:58,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50745 conditions, 3541 events. 1920/3541 cut-off events. For 434862/434862 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 23363 event pairs, 800 based on Foata normal form. 20/3559 useless extension candidates. Maximal degree in co-relation 50528. Up to 3200 conditions per place. [2024-06-27 16:38:58,515 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 505 selfloop transitions, 80 changer transitions 2/588 dead transitions. [2024-06-27 16:38:58,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 588 transitions, 11900 flow [2024-06-27 16:38:58,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 16:38:58,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 16:38:58,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 161 transitions. [2024-06-27 16:38:58,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33264462809917356 [2024-06-27 16:38:58,516 INFO L175 Difference]: Start difference. First operand has 604 places, 546 transitions, 9814 flow. Second operand 22 states and 161 transitions. [2024-06-27 16:38:58,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 625 places, 588 transitions, 11900 flow [2024-06-27 16:39:01,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 604 places, 588 transitions, 11394 flow, removed 22 selfloop flow, removed 21 redundant places. [2024-06-27 16:39:01,215 INFO L231 Difference]: Finished difference. Result has 606 places, 550 transitions, 9727 flow [2024-06-27 16:39:01,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9314, PETRI_DIFFERENCE_MINUEND_PLACES=583, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=9727, PETRI_PLACES=606, PETRI_TRANSITIONS=550} [2024-06-27 16:39:01,216 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 584 predicate places. [2024-06-27 16:39:01,216 INFO L495 AbstractCegarLoop]: Abstraction has has 606 places, 550 transitions, 9727 flow [2024-06-27 16:39:01,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 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 16:39:01,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:39:01,217 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:39:01,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2024-06-27 16:39:01,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2024-06-27 16:39:01,424 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:39:01,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:39:01,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1891953377, now seen corresponding path program 127 times [2024-06-27 16:39:01,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:39:01,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410829664] [2024-06-27 16:39:01,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:39:01,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:39:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:39:02,028 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:39:02,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:39:02,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410829664] [2024-06-27 16:39:02,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410829664] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:39:02,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037427451] [2024-06-27 16:39:02,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:39:02,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:39:02,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:39:02,030 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:39:02,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2024-06-27 16:39:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:39:02,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:39:02,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:39:02,616 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:39:02,617 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 58 treesize of output 34 [2024-06-27 16:39:02,665 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:39:02,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:39:02,829 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-06-27 16:39:02,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-06-27 16:39:02,838 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:39:02,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037427451] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:39:02,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:39:02,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-06-27 16:39:02,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720794462] [2024-06-27 16:39:02,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:39:02,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:39:02,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:39:02,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:39:02,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:39:02,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:39:02,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 606 places, 550 transitions, 9727 flow. Second operand has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 29 states have internal predecessors, (137), 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 16:39:02,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:39:02,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:39:02,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:39:04,612 INFO L124 PetriNetUnfolderBase]: 1928/3562 cut-off events. [2024-06-27 16:39:04,612 INFO L125 PetriNetUnfolderBase]: For 435073/435073 co-relation queries the response was YES. [2024-06-27 16:39:04,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51175 conditions, 3562 events. 1928/3562 cut-off events. For 435073/435073 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 23590 event pairs, 140 based on Foata normal form. 6/3566 useless extension candidates. Maximal degree in co-relation 50959. Up to 2069 conditions per place. [2024-06-27 16:39:04,688 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 386 selfloop transitions, 200 changer transitions 6/593 dead transitions. [2024-06-27 16:39:04,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 628 places, 593 transitions, 12236 flow [2024-06-27 16:39:04,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 16:39:04,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 16:39:04,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 160 transitions. [2024-06-27 16:39:04,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31620553359683795 [2024-06-27 16:39:04,689 INFO L175 Difference]: Start difference. First operand has 606 places, 550 transitions, 9727 flow. Second operand 23 states and 160 transitions. [2024-06-27 16:39:04,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 628 places, 593 transitions, 12236 flow [2024-06-27 16:39:07,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 593 transitions, 11972 flow, removed 78 selfloop flow, removed 18 redundant places. [2024-06-27 16:39:07,336 INFO L231 Difference]: Finished difference. Result has 613 places, 552 transitions, 10012 flow [2024-06-27 16:39:07,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9463, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=10012, PETRI_PLACES=613, PETRI_TRANSITIONS=552} [2024-06-27 16:39:07,336 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 591 predicate places. [2024-06-27 16:39:07,336 INFO L495 AbstractCegarLoop]: Abstraction has has 613 places, 552 transitions, 10012 flow [2024-06-27 16:39:07,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 29 states have internal predecessors, (137), 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 16:39:07,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:39:07,337 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:39:07,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2024-06-27 16:39:07,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2024-06-27 16:39:07,550 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:39:07,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:39:07,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1440153155, now seen corresponding path program 128 times [2024-06-27 16:39:07,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:39:07,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880588926] [2024-06-27 16:39:07,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:39:07,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:39:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:39:08,061 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:39:08,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:39:08,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880588926] [2024-06-27 16:39:08,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880588926] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:39:08,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321238440] [2024-06-27 16:39:08,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:39:08,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:39:08,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:39:08,063 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:39:08,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2024-06-27 16:39:08,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:39:08,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:39:08,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 39 conjunts are in the unsatisfiable core [2024-06-27 16:39:08,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:39:08,726 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 16:39:08,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-06-27 16:39:08,728 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:39:08,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:39:08,853 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:39:08,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-06-27 16:39:08,920 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:39:08,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321238440] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:39:08,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:39:08,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 28 [2024-06-27 16:39:08,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271261654] [2024-06-27 16:39:08,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:39:08,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-06-27 16:39:08,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:39:08,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-06-27 16:39:08,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2024-06-27 16:39:08,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:39:08,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 613 places, 552 transitions, 10012 flow. Second operand has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 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 16:39:08,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:39:08,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:39:08,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:39:10,606 INFO L124 PetriNetUnfolderBase]: 1951/3599 cut-off events. [2024-06-27 16:39:10,606 INFO L125 PetriNetUnfolderBase]: For 449800/449800 co-relation queries the response was YES. [2024-06-27 16:39:10,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52506 conditions, 3599 events. 1951/3599 cut-off events. For 449800/449800 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 23836 event pairs, 834 based on Foata normal form. 8/3605 useless extension candidates. Maximal degree in co-relation 52287. Up to 3352 conditions per place. [2024-06-27 16:39:10,684 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 523 selfloop transitions, 63 changer transitions 0/587 dead transitions. [2024-06-27 16:39:10,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 633 places, 587 transitions, 12278 flow [2024-06-27 16:39:10,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 16:39:10,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 16:39:10,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 150 transitions. [2024-06-27 16:39:10,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30991735537190085 [2024-06-27 16:39:10,685 INFO L175 Difference]: Start difference. First operand has 613 places, 552 transitions, 10012 flow. Second operand 22 states and 150 transitions. [2024-06-27 16:39:10,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 633 places, 587 transitions, 12278 flow [2024-06-27 16:39:13,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 587 transitions, 11753 flow, removed 63 selfloop flow, removed 21 redundant places. [2024-06-27 16:39:13,416 INFO L231 Difference]: Finished difference. Result has 616 places, 556 transitions, 9827 flow [2024-06-27 16:39:13,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9493, PETRI_DIFFERENCE_MINUEND_PLACES=591, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=9827, PETRI_PLACES=616, PETRI_TRANSITIONS=556} [2024-06-27 16:39:13,417 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 594 predicate places. [2024-06-27 16:39:13,417 INFO L495 AbstractCegarLoop]: Abstraction has has 616 places, 556 transitions, 9827 flow [2024-06-27 16:39:13,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 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 16:39:13,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:39:13,417 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:39:13,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2024-06-27 16:39:13,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2024-06-27 16:39:13,630 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:39:13,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:39:13,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1494447327, now seen corresponding path program 129 times [2024-06-27 16:39:13,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:39:13,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577887245] [2024-06-27 16:39:13,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:39:13,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:39:13,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:39:14,137 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:39:14,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:39:14,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577887245] [2024-06-27 16:39:14,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577887245] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:39:14,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493625219] [2024-06-27 16:39:14,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:39:14,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:39:14,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:39:14,139 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:39:14,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2024-06-27 16:39:14,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:39:14,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:39:14,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 41 conjunts are in the unsatisfiable core [2024-06-27 16:39:14,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:39:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:39:14,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:39:14,855 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:39:14,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-06-27 16:39:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:39:14,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493625219] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:39:14,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:39:14,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 30 [2024-06-27 16:39:14,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811945934] [2024-06-27 16:39:14,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:39:14,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:39:14,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:39:14,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:39:14,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:39:14,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:39:14,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 616 places, 556 transitions, 9827 flow. Second operand has 30 states, 30 states have (on average 4.766666666666667) internal successors, (143), 30 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 16:39:14,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:39:14,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:39:14,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:39:16,680 INFO L124 PetriNetUnfolderBase]: 1976/3624 cut-off events. [2024-06-27 16:39:16,680 INFO L125 PetriNetUnfolderBase]: For 468932/468932 co-relation queries the response was YES. [2024-06-27 16:39:16,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53492 conditions, 3624 events. 1976/3624 cut-off events. For 468932/468932 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 23921 event pairs, 823 based on Foata normal form. 26/3648 useless extension candidates. Maximal degree in co-relation 53271. Up to 3337 conditions per place. [2024-06-27 16:39:16,759 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 520 selfloop transitions, 76 changer transitions 0/597 dead transitions. [2024-06-27 16:39:16,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 640 places, 597 transitions, 12538 flow [2024-06-27 16:39:16,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 16:39:16,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 16:39:16,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 169 transitions. [2024-06-27 16:39:16,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30727272727272725 [2024-06-27 16:39:16,760 INFO L175 Difference]: Start difference. First operand has 616 places, 556 transitions, 9827 flow. Second operand 25 states and 169 transitions. [2024-06-27 16:39:16,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 640 places, 597 transitions, 12538 flow [2024-06-27 16:39:19,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 622 places, 597 transitions, 12213 flow, removed 101 selfloop flow, removed 18 redundant places. [2024-06-27 16:39:19,488 INFO L231 Difference]: Finished difference. Result has 626 places, 563 transitions, 10121 flow [2024-06-27 16:39:19,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9594, PETRI_DIFFERENCE_MINUEND_PLACES=598, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=10121, PETRI_PLACES=626, PETRI_TRANSITIONS=563} [2024-06-27 16:39:19,489 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 604 predicate places. [2024-06-27 16:39:19,489 INFO L495 AbstractCegarLoop]: Abstraction has has 626 places, 563 transitions, 10121 flow [2024-06-27 16:39:19,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.766666666666667) internal successors, (143), 30 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 16:39:19,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:39:19,489 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:39:19,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2024-06-27 16:39:19,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:39:19,702 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:39:19,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:39:19,702 INFO L85 PathProgramCache]: Analyzing trace with hash -86317954, now seen corresponding path program 130 times [2024-06-27 16:39:19,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:39:19,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667875532] [2024-06-27 16:39:19,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:39:19,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:39:19,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:39:20,272 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:39:20,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:39:20,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667875532] [2024-06-27 16:39:20,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667875532] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:39:20,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450848730] [2024-06-27 16:39:20,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:39:20,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:39:20,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:39:20,273 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:39:20,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2024-06-27 16:39:20,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:39:20,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:39:20,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 16:39:20,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:39:20,857 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:39:20,857 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 81 treesize of output 45 [2024-06-27 16:39:20,894 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:39:20,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:39:21,011 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:39:21,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-06-27 16:39:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:39:21,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450848730] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:39:21,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:39:21,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-06-27 16:39:21,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551945799] [2024-06-27 16:39:21,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:39:21,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:39:21,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:39:21,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:39:21,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:39:21,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:39:21,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 626 places, 563 transitions, 10121 flow. Second operand has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 29 states have internal predecessors, (137), 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 16:39:21,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:39:21,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:39:21,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:39:23,163 INFO L124 PetriNetUnfolderBase]: 1986/3658 cut-off events. [2024-06-27 16:39:23,163 INFO L125 PetriNetUnfolderBase]: For 495608/495608 co-relation queries the response was YES. [2024-06-27 16:39:23,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54317 conditions, 3658 events. 1986/3658 cut-off events. For 495608/495608 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 24280 event pairs, 727 based on Foata normal form. 15/3669 useless extension candidates. Maximal degree in co-relation 54093. Up to 3074 conditions per place. [2024-06-27 16:39:23,239 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 491 selfloop transitions, 121 changer transitions 3/616 dead transitions. [2024-06-27 16:39:23,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 651 places, 616 transitions, 12552 flow [2024-06-27 16:39:23,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 16:39:23,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-27 16:39:23,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 191 transitions. [2024-06-27 16:39:23,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3339160839160839 [2024-06-27 16:39:23,240 INFO L175 Difference]: Start difference. First operand has 626 places, 563 transitions, 10121 flow. Second operand 26 states and 191 transitions. [2024-06-27 16:39:23,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 651 places, 616 transitions, 12552 flow [2024-06-27 16:39:25,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 628 places, 616 transitions, 12208 flow, removed 91 selfloop flow, removed 23 redundant places. [2024-06-27 16:39:25,572 INFO L231 Difference]: Finished difference. Result has 631 places, 566 transitions, 10222 flow [2024-06-27 16:39:25,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9777, PETRI_DIFFERENCE_MINUEND_PLACES=603, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=10222, PETRI_PLACES=631, PETRI_TRANSITIONS=566} [2024-06-27 16:39:25,572 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 609 predicate places. [2024-06-27 16:39:25,572 INFO L495 AbstractCegarLoop]: Abstraction has has 631 places, 566 transitions, 10222 flow [2024-06-27 16:39:25,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 29 states have internal predecessors, (137), 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 16:39:25,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:39:25,573 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:39:25,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2024-06-27 16:39:25,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2024-06-27 16:39:25,777 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:39:25,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:39:25,777 INFO L85 PathProgramCache]: Analyzing trace with hash -295120349, now seen corresponding path program 131 times [2024-06-27 16:39:25,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:39:25,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408998073] [2024-06-27 16:39:25,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:39:25,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:39:25,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:39:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:39:26,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:39:26,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408998073] [2024-06-27 16:39:26,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408998073] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:39:26,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846110068] [2024-06-27 16:39:26,345 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:39:26,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:39:26,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:39:26,346 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:39:26,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2024-06-27 16:39:26,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:39:26,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:39:26,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 16:39:26,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:39:27,031 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:39:27,031 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 73 treesize of output 45 [2024-06-27 16:39:27,068 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:39:27,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:39:27,197 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:39:27,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-06-27 16:39:27,270 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:39:27,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846110068] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:39:27,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:39:27,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 9] total 33 [2024-06-27 16:39:27,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76976974] [2024-06-27 16:39:27,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:39:27,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 16:39:27,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:39:27,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 16:39:27,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 16:39:27,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:39:27,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 631 places, 566 transitions, 10222 flow. Second operand has 33 states, 33 states have (on average 4.787878787878788) internal successors, (158), 33 states have internal predecessors, (158), 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 16:39:27,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:39:27,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:39:27,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:39:29,592 INFO L124 PetriNetUnfolderBase]: 2054/3784 cut-off events. [2024-06-27 16:39:29,593 INFO L125 PetriNetUnfolderBase]: For 524942/524942 co-relation queries the response was YES. [2024-06-27 16:39:29,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57469 conditions, 3784 events. 2054/3784 cut-off events. For 524942/524942 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 25247 event pairs, 813 based on Foata normal form. 16/3796 useless extension candidates. Maximal degree in co-relation 57244. Up to 3317 conditions per place. [2024-06-27 16:39:29,673 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 529 selfloop transitions, 105 changer transitions 3/638 dead transitions. [2024-06-27 16:39:29,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 661 places, 638 transitions, 13750 flow [2024-06-27 16:39:29,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-06-27 16:39:29,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-06-27 16:39:29,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 215 transitions. [2024-06-27 16:39:29,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3152492668621701 [2024-06-27 16:39:29,675 INFO L175 Difference]: Start difference. First operand has 631 places, 566 transitions, 10222 flow. Second operand 31 states and 215 transitions. [2024-06-27 16:39:29,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 661 places, 638 transitions, 13750 flow [2024-06-27 16:39:32,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 640 places, 638 transitions, 13414 flow, removed 79 selfloop flow, removed 21 redundant places. [2024-06-27 16:39:32,747 INFO L231 Difference]: Finished difference. Result has 644 places, 581 transitions, 10782 flow [2024-06-27 16:39:32,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9898, PETRI_DIFFERENCE_MINUEND_PLACES=610, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=10782, PETRI_PLACES=644, PETRI_TRANSITIONS=581} [2024-06-27 16:39:32,748 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 622 predicate places. [2024-06-27 16:39:32,748 INFO L495 AbstractCegarLoop]: Abstraction has has 644 places, 581 transitions, 10782 flow [2024-06-27 16:39:32,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.787878787878788) internal successors, (158), 33 states have internal predecessors, (158), 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 16:39:32,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:39:32,748 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:39:32,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2024-06-27 16:39:32,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:39:32,952 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:39:32,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:39:32,952 INFO L85 PathProgramCache]: Analyzing trace with hash -2138424744, now seen corresponding path program 132 times [2024-06-27 16:39:32,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:39:32,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731761850] [2024-06-27 16:39:32,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:39:32,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:39:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:39:33,448 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:39:33,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:39:33,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731761850] [2024-06-27 16:39:33,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731761850] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:39:33,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681761510] [2024-06-27 16:39:33,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:39:33,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:39:33,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:39:33,450 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:39:33,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2024-06-27 16:39:33,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 16:39:33,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:39:33,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 35 conjunts are in the unsatisfiable core [2024-06-27 16:39:33,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:39:34,096 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 16:39:34,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-06-27 16:39:34,100 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:39:34,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:39:34,195 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:39:34,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-06-27 16:39:34,248 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:39:34,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681761510] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:39:34,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:39:34,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 28 [2024-06-27 16:39:34,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145367927] [2024-06-27 16:39:34,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:39:34,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-06-27 16:39:34,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:39:34,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-06-27 16:39:34,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2024-06-27 16:39:34,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:39:34,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 644 places, 581 transitions, 10782 flow. Second operand has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 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 16:39:34,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:39:34,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:39:34,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:39:36,080 INFO L124 PetriNetUnfolderBase]: 2068/3808 cut-off events. [2024-06-27 16:39:36,081 INFO L125 PetriNetUnfolderBase]: For 554841/554841 co-relation queries the response was YES. [2024-06-27 16:39:36,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58699 conditions, 3808 events. 2068/3808 cut-off events. For 554841/554841 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 25537 event pairs, 785 based on Foata normal form. 10/3814 useless extension candidates. Maximal degree in co-relation 58471. Up to 3303 conditions per place. [2024-06-27 16:39:36,179 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 511 selfloop transitions, 112 changer transitions 0/624 dead transitions. [2024-06-27 16:39:36,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 668 places, 624 transitions, 13123 flow [2024-06-27 16:39:36,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 16:39:36,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 16:39:36,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 175 transitions. [2024-06-27 16:39:36,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-06-27 16:39:36,181 INFO L175 Difference]: Start difference. First operand has 644 places, 581 transitions, 10782 flow. Second operand 25 states and 175 transitions. [2024-06-27 16:39:36,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 668 places, 624 transitions, 13123 flow [2024-06-27 16:39:39,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 645 places, 624 transitions, 12625 flow, removed 166 selfloop flow, removed 23 redundant places. [2024-06-27 16:39:39,208 INFO L231 Difference]: Finished difference. Result has 647 places, 583 transitions, 10679 flow [2024-06-27 16:39:39,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=10284, PETRI_DIFFERENCE_MINUEND_PLACES=621, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=10679, PETRI_PLACES=647, PETRI_TRANSITIONS=583} [2024-06-27 16:39:39,209 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 625 predicate places. [2024-06-27 16:39:39,209 INFO L495 AbstractCegarLoop]: Abstraction has has 647 places, 583 transitions, 10679 flow [2024-06-27 16:39:39,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 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 16:39:39,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:39:39,209 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:39:39,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2024-06-27 16:39:39,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:39:39,422 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:39:39,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:39:39,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1462938015, now seen corresponding path program 133 times [2024-06-27 16:39:39,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:39:39,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001147274] [2024-06-27 16:39:39,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:39:39,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:39:39,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:39:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:39:39,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:39:39,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001147274] [2024-06-27 16:39:39,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001147274] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:39:39,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384130389] [2024-06-27 16:39:39,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:39:39,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:39:39,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:39:39,920 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:39:39,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2024-06-27 16:39:40,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:39:40,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:39:40,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:39:40,520 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-06-27 16:39:40,521 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 33 treesize of output 9 [2024-06-27 16:39:40,522 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:39:40,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:39:40,621 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:39:40,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-06-27 16:39:40,675 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:39:40,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384130389] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:39:40,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:39:40,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-06-27 16:39:40,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110414321] [2024-06-27 16:39:40,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:39:40,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:39:40,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:39:40,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:39:40,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:39:40,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:39:40,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 647 places, 583 transitions, 10679 flow. Second operand has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 29 states have internal predecessors, (137), 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 16:39:40,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:39:40,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:39:40,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:39:42,695 INFO L124 PetriNetUnfolderBase]: 2094/3855 cut-off events. [2024-06-27 16:39:42,695 INFO L125 PetriNetUnfolderBase]: For 580771/580771 co-relation queries the response was YES. [2024-06-27 16:39:42,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59830 conditions, 3855 events. 2094/3855 cut-off events. For 580771/580771 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 25881 event pairs, 887 based on Foata normal form. 8/3859 useless extension candidates. Maximal degree in co-relation 59600. Up to 3549 conditions per place. [2024-06-27 16:39:42,780 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 550 selfloop transitions, 75 changer transitions 3/629 dead transitions. [2024-06-27 16:39:42,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 670 places, 629 transitions, 13419 flow [2024-06-27 16:39:42,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-06-27 16:39:42,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-06-27 16:39:42,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 170 transitions. [2024-06-27 16:39:42,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32196969696969696 [2024-06-27 16:39:42,781 INFO L175 Difference]: Start difference. First operand has 647 places, 583 transitions, 10679 flow. Second operand 24 states and 170 transitions. [2024-06-27 16:39:42,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 670 places, 629 transitions, 13419 flow [2024-06-27 16:39:45,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 647 places, 629 transitions, 12967 flow, removed 63 selfloop flow, removed 23 redundant places. [2024-06-27 16:39:45,944 INFO L231 Difference]: Finished difference. Result has 650 places, 588 transitions, 10728 flow [2024-06-27 16:39:45,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=10227, PETRI_DIFFERENCE_MINUEND_PLACES=624, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=10728, PETRI_PLACES=650, PETRI_TRANSITIONS=588} [2024-06-27 16:39:45,944 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 628 predicate places. [2024-06-27 16:39:45,944 INFO L495 AbstractCegarLoop]: Abstraction has has 650 places, 588 transitions, 10728 flow [2024-06-27 16:39:45,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 29 states have internal predecessors, (137), 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 16:39:45,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:39:45,945 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:39:45,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2024-06-27 16:39:46,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:39:46,158 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:39:46,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:39:46,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1655246496, now seen corresponding path program 134 times [2024-06-27 16:39:46,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:39:46,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34638718] [2024-06-27 16:39:46,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:39:46,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:39:46,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:39:46,853 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:39:46,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:39:46,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34638718] [2024-06-27 16:39:46,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34638718] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:39:46,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534997997] [2024-06-27 16:39:46,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:39:46,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:39:46,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:39:46,855 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:39:46,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2024-06-27 16:39:47,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:39:47,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:39:47,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 41 conjunts are in the unsatisfiable core [2024-06-27 16:39:47,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:39:47,499 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:39:47,499 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 65 treesize of output 41 [2024-06-27 16:39:47,535 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:39:47,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:39:47,680 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-06-27 16:39:47,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-06-27 16:39:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:39:47,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534997997] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:39:47,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:39:47,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 31 [2024-06-27 16:39:47,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987297985] [2024-06-27 16:39:47,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:39:47,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-27 16:39:47,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:39:47,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-27 16:39:47,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2024-06-27 16:39:47,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:39:47,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 650 places, 588 transitions, 10728 flow. Second operand has 31 states, 31 states have (on average 4.741935483870968) internal successors, (147), 31 states have internal predecessors, (147), 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 16:39:47,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:39:47,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:39:47,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:39:49,729 INFO L124 PetriNetUnfolderBase]: 2103/3877 cut-off events. [2024-06-27 16:39:49,729 INFO L125 PetriNetUnfolderBase]: For 596570/596570 co-relation queries the response was YES. [2024-06-27 16:39:49,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60269 conditions, 3877 events. 2103/3877 cut-off events. For 596570/596570 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 26076 event pairs, 589 based on Foata normal form. 5/3878 useless extension candidates. Maximal degree in co-relation 60037. Up to 2542 conditions per place. [2024-06-27 16:39:49,810 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 418 selfloop transitions, 192 changer transitions 0/611 dead transitions. [2024-06-27 16:39:49,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 611 transitions, 12637 flow [2024-06-27 16:39:49,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 16:39:49,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 16:39:49,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 117 transitions. [2024-06-27 16:39:49,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33238636363636365 [2024-06-27 16:39:49,812 INFO L175 Difference]: Start difference. First operand has 650 places, 588 transitions, 10728 flow. Second operand 16 states and 117 transitions. [2024-06-27 16:39:49,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 611 transitions, 12637 flow [2024-06-27 16:39:53,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 647 places, 611 transitions, 12336 flow, removed 102 selfloop flow, removed 18 redundant places. [2024-06-27 16:39:53,180 INFO L231 Difference]: Finished difference. Result has 648 places, 589 transitions, 10887 flow [2024-06-27 16:39:53,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=10427, PETRI_DIFFERENCE_MINUEND_PLACES=632, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10887, PETRI_PLACES=648, PETRI_TRANSITIONS=589} [2024-06-27 16:39:53,181 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 626 predicate places. [2024-06-27 16:39:53,181 INFO L495 AbstractCegarLoop]: Abstraction has has 648 places, 589 transitions, 10887 flow [2024-06-27 16:39:53,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.741935483870968) internal successors, (147), 31 states have internal predecessors, (147), 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 16:39:53,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:39:53,181 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:39:53,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2024-06-27 16:39:53,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:39:53,394 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:39:53,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:39:53,395 INFO L85 PathProgramCache]: Analyzing trace with hash -326629661, now seen corresponding path program 135 times [2024-06-27 16:39:53,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:39:53,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149052031] [2024-06-27 16:39:53,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:39:53,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:39:53,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:39:54,123 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:39:54,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:39:54,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149052031] [2024-06-27 16:39:54,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149052031] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:39:54,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987016065] [2024-06-27 16:39:54,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:39:54,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:39:54,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:39:54,124 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:39:54,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2024-06-27 16:39:54,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:39:54,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:39:54,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 41 conjunts are in the unsatisfiable core [2024-06-27 16:39:54,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:39:54,750 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:39:54,751 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 65 treesize of output 41 [2024-06-27 16:39:54,789 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:39:54,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:39:54,898 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:39:54,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-06-27 16:39:54,980 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:39:54,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987016065] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:39:54,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:39:54,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 30 [2024-06-27 16:39:54,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863041124] [2024-06-27 16:39:54,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:39:54,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:39:54,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:39:54,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:39:54,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:39:54,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:39:54,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 648 places, 589 transitions, 10887 flow. Second operand has 30 states, 30 states have (on average 4.7) internal successors, (141), 30 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:39:54,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:39:54,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:39:54,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:39:57,145 INFO L124 PetriNetUnfolderBase]: 2137/3953 cut-off events. [2024-06-27 16:39:57,146 INFO L125 PetriNetUnfolderBase]: For 613998/613998 co-relation queries the response was YES. [2024-06-27 16:39:57,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62298 conditions, 3953 events. 2137/3953 cut-off events. For 613998/613998 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 26816 event pairs, 868 based on Foata normal form. 8/3959 useless extension candidates. Maximal degree in co-relation 62065. Up to 3504 conditions per place. [2024-06-27 16:39:57,234 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 553 selfloop transitions, 98 changer transitions 6/658 dead transitions. [2024-06-27 16:39:57,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 675 places, 658 transitions, 14330 flow [2024-06-27 16:39:57,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-06-27 16:39:57,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-06-27 16:39:57,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 204 transitions. [2024-06-27 16:39:57,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33116883116883117 [2024-06-27 16:39:57,235 INFO L175 Difference]: Start difference. First operand has 648 places, 589 transitions, 10887 flow. Second operand 28 states and 204 transitions. [2024-06-27 16:39:57,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 675 places, 658 transitions, 14330 flow [2024-06-27 16:40:00,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 662 places, 658 transitions, 14033 flow, removed 27 selfloop flow, removed 13 redundant places. [2024-06-27 16:40:00,546 INFO L231 Difference]: Finished difference. Result has 667 places, 600 transitions, 11429 flow [2024-06-27 16:40:00,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=10591, PETRI_DIFFERENCE_MINUEND_PLACES=635, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=11429, PETRI_PLACES=667, PETRI_TRANSITIONS=600} [2024-06-27 16:40:00,547 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 645 predicate places. [2024-06-27 16:40:00,547 INFO L495 AbstractCegarLoop]: Abstraction has has 667 places, 600 transitions, 11429 flow [2024-06-27 16:40:00,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.7) internal successors, (141), 30 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:40:00,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:40:00,547 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:40:00,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2024-06-27 16:40:00,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2024-06-27 16:40:00,752 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:40:00,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:40:00,752 INFO L85 PathProgramCache]: Analyzing trace with hash -861759272, now seen corresponding path program 136 times [2024-06-27 16:40:00,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:40:00,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779241818] [2024-06-27 16:40:00,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:40:00,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:40:00,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:40:01,330 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:40:01,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:40:01,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779241818] [2024-06-27 16:40:01,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779241818] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:40:01,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076577342] [2024-06-27 16:40:01,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:40:01,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:40:01,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:40:01,332 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:40:01,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2024-06-27 16:40:01,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:40:01,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:40:01,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:40:01,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:40:01,963 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:40:01,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:40:02,078 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-06-27 16:40:02,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-06-27 16:40:02,095 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:40:02,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076577342] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:40:02,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:40:02,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 28 [2024-06-27 16:40:02,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856672179] [2024-06-27 16:40:02,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:40:02,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-06-27 16:40:02,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:40:02,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-06-27 16:40:02,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2024-06-27 16:40:02,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:40:02,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 667 places, 600 transitions, 11429 flow. Second operand has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 states have internal predecessors, (132), 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 16:40:02,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:40:02,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:40:02,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:40:03,903 INFO L124 PetriNetUnfolderBase]: 2135/3951 cut-off events. [2024-06-27 16:40:03,904 INFO L125 PetriNetUnfolderBase]: For 638674/638674 co-relation queries the response was YES. [2024-06-27 16:40:03,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62964 conditions, 3951 events. 2135/3951 cut-off events. For 638674/638674 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 26818 event pairs, 586 based on Foata normal form. 2/3949 useless extension candidates. Maximal degree in co-relation 62726. Up to 2606 conditions per place. [2024-06-27 16:40:03,994 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 421 selfloop transitions, 199 changer transitions 11/632 dead transitions. [2024-06-27 16:40:03,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 682 places, 632 transitions, 13523 flow [2024-06-27 16:40:03,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 16:40:03,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 16:40:03,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 108 transitions. [2024-06-27 16:40:03,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3068181818181818 [2024-06-27 16:40:03,995 INFO L175 Difference]: Start difference. First operand has 667 places, 600 transitions, 11429 flow. Second operand 16 states and 108 transitions. [2024-06-27 16:40:03,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 682 places, 632 transitions, 13523 flow [2024-06-27 16:40:07,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 664 places, 632 transitions, 12871 flow, removed 255 selfloop flow, removed 18 redundant places. [2024-06-27 16:40:07,577 INFO L231 Difference]: Finished difference. Result has 668 places, 600 transitions, 11322 flow [2024-06-27 16:40:07,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=10903, PETRI_DIFFERENCE_MINUEND_PLACES=649, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=11322, PETRI_PLACES=668, PETRI_TRANSITIONS=600} [2024-06-27 16:40:07,577 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 646 predicate places. [2024-06-27 16:40:07,578 INFO L495 AbstractCegarLoop]: Abstraction has has 668 places, 600 transitions, 11322 flow [2024-06-27 16:40:07,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 states have internal predecessors, (132), 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 16:40:07,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:40:07,578 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:40:07,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2024-06-27 16:40:07,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2024-06-27 16:40:07,791 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:40:07,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:40:07,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1196374563, now seen corresponding path program 137 times [2024-06-27 16:40:07,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:40:07,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034059072] [2024-06-27 16:40:07,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:40:07,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:40:07,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:40:08,373 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:40:08,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:40:08,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034059072] [2024-06-27 16:40:08,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034059072] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:40:08,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089683809] [2024-06-27 16:40:08,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:40:08,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:40:08,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:40:08,375 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:40:08,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2024-06-27 16:40:08,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:40:08,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:40:08,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:40:08,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:40:09,092 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:40:09,093 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 52 treesize of output 34 [2024-06-27 16:40:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:40:09,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:40:09,240 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:40:09,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-06-27 16:40:09,314 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:40:09,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089683809] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:40:09,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:40:09,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 9] total 32 [2024-06-27 16:40:09,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512920865] [2024-06-27 16:40:09,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:40:09,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-06-27 16:40:09,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:40:09,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-06-27 16:40:09,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2024-06-27 16:40:09,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:40:09,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 668 places, 600 transitions, 11322 flow. Second operand has 32 states, 32 states have (on average 4.8125) internal successors, (154), 32 states have internal predecessors, (154), 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 16:40:09,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:40:09,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:40:09,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:40:11,474 INFO L124 PetriNetUnfolderBase]: 2130/3953 cut-off events. [2024-06-27 16:40:11,474 INFO L125 PetriNetUnfolderBase]: For 640933/640933 co-relation queries the response was YES. [2024-06-27 16:40:11,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62739 conditions, 3953 events. 2130/3953 cut-off events. For 640933/640933 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 26895 event pairs, 903 based on Foata normal form. 16/3967 useless extension candidates. Maximal degree in co-relation 62497. Up to 3597 conditions per place. [2024-06-27 16:40:11,558 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 558 selfloop transitions, 76 changer transitions 3/638 dead transitions. [2024-06-27 16:40:11,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 686 places, 638 transitions, 13557 flow [2024-06-27 16:40:11,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 16:40:11,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 16:40:11,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 161 transitions. [2024-06-27 16:40:11,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33264462809917356 [2024-06-27 16:40:11,560 INFO L175 Difference]: Start difference. First operand has 668 places, 600 transitions, 11322 flow. Second operand 22 states and 161 transitions. [2024-06-27 16:40:11,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 686 places, 638 transitions, 13557 flow [2024-06-27 16:40:15,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 673 places, 638 transitions, 13256 flow, removed 36 selfloop flow, removed 13 redundant places. [2024-06-27 16:40:15,101 INFO L231 Difference]: Finished difference. Result has 675 places, 601 transitions, 11269 flow [2024-06-27 16:40:15,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11023, PETRI_DIFFERENCE_MINUEND_PLACES=652, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=11269, PETRI_PLACES=675, PETRI_TRANSITIONS=601} [2024-06-27 16:40:15,102 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 653 predicate places. [2024-06-27 16:40:15,102 INFO L495 AbstractCegarLoop]: Abstraction has has 675 places, 601 transitions, 11269 flow [2024-06-27 16:40:15,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.8125) internal successors, (154), 32 states have internal predecessors, (154), 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 16:40:15,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:40:15,103 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:40:15,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2024-06-27 16:40:15,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:40:15,316 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:40:15,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:40:15,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1198189562, now seen corresponding path program 138 times [2024-06-27 16:40:15,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:40:15,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259852088] [2024-06-27 16:40:15,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:40:15,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:40:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:40:15,880 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:40:15,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:40:15,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259852088] [2024-06-27 16:40:15,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259852088] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:40:15,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979140121] [2024-06-27 16:40:15,881 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:40:15,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:40:15,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:40:15,882 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:40:15,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2024-06-27 16:40:16,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 16:40:16,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:40:16,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:40:16,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:40:16,496 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:40:16,497 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 65 treesize of output 41 [2024-06-27 16:40:16,528 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:40:16,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:40:16,625 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:40:16,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-06-27 16:40:16,699 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:40:16,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979140121] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:40:16,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:40:16,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 29 [2024-06-27 16:40:16,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382713746] [2024-06-27 16:40:16,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:40:16,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:40:16,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:40:16,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:40:16,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:40:16,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:40:16,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 675 places, 601 transitions, 11269 flow. Second operand has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 29 states have internal predecessors, (137), 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 16:40:16,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:40:16,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:40:16,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:40:18,845 INFO L124 PetriNetUnfolderBase]: 2147/3991 cut-off events. [2024-06-27 16:40:18,846 INFO L125 PetriNetUnfolderBase]: For 666820/666820 co-relation queries the response was YES. [2024-06-27 16:40:18,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63907 conditions, 3991 events. 2147/3991 cut-off events. For 666820/666820 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 27312 event pairs, 801 based on Foata normal form. 8/3997 useless extension candidates. Maximal degree in co-relation 63666. Up to 3392 conditions per place. [2024-06-27 16:40:18,941 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 536 selfloop transitions, 117 changer transitions 4/658 dead transitions. [2024-06-27 16:40:18,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 701 places, 658 transitions, 14236 flow [2024-06-27 16:40:18,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 16:40:18,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 16:40:18,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 194 transitions. [2024-06-27 16:40:18,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3265993265993266 [2024-06-27 16:40:18,942 INFO L175 Difference]: Start difference. First operand has 675 places, 601 transitions, 11269 flow. Second operand 27 states and 194 transitions. [2024-06-27 16:40:18,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 701 places, 658 transitions, 14236 flow [2024-06-27 16:40:22,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 667 places, 658 transitions, 13925 flow, removed 44 selfloop flow, removed 34 redundant places. [2024-06-27 16:40:22,894 INFO L231 Difference]: Finished difference. Result has 672 places, 605 transitions, 11572 flow [2024-06-27 16:40:22,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=10958, PETRI_DIFFERENCE_MINUEND_PLACES=641, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=11572, PETRI_PLACES=672, PETRI_TRANSITIONS=605} [2024-06-27 16:40:22,895 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 650 predicate places. [2024-06-27 16:40:22,895 INFO L495 AbstractCegarLoop]: Abstraction has has 672 places, 605 transitions, 11572 flow [2024-06-27 16:40:22,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 29 states have internal predecessors, (137), 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 16:40:22,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:40:22,895 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:40:22,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2024-06-27 16:40:23,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2024-06-27 16:40:23,100 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:40:23,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:40:23,100 INFO L85 PathProgramCache]: Analyzing trace with hash 989627834, now seen corresponding path program 139 times [2024-06-27 16:40:23,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:40:23,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558026365] [2024-06-27 16:40:23,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:40:23,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:40:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:40:23,816 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:40:23,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:40:23,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558026365] [2024-06-27 16:40:23,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558026365] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:40:23,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302396036] [2024-06-27 16:40:23,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:40:23,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:40:23,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:40:23,818 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:40:23,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2024-06-27 16:40:24,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:40:24,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 16:40:24,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:40:24,496 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:40:24,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:40:24,651 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-06-27 16:40:24,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-06-27 16:40:24,665 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:40:24,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302396036] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:40:24,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:40:24,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-06-27 16:40:24,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940192393] [2024-06-27 16:40:24,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:40:24,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:40:24,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:40:24,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:40:24,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:40:24,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:40:24,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 672 places, 605 transitions, 11572 flow. Second operand has 29 states, 29 states have (on average 4.655172413793103) internal successors, (135), 29 states have internal predecessors, (135), 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 16:40:24,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:40:24,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:40:24,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:40:26,684 INFO L124 PetriNetUnfolderBase]: 2144/3986 cut-off events. [2024-06-27 16:40:26,685 INFO L125 PetriNetUnfolderBase]: For 684645/684645 co-relation queries the response was YES. [2024-06-27 16:40:26,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64342 conditions, 3986 events. 2144/3986 cut-off events. For 684645/684645 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 27236 event pairs, 607 based on Foata normal form. 2/3986 useless extension candidates. Maximal degree in co-relation 64111. Up to 2635 conditions per place. [2024-06-27 16:40:26,775 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 426 selfloop transitions, 192 changer transitions 4/623 dead transitions. [2024-06-27 16:40:26,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 686 places, 623 transitions, 13225 flow [2024-06-27 16:40:26,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 16:40:26,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 16:40:26,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 109 transitions. [2024-06-27 16:40:26,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3096590909090909 [2024-06-27 16:40:26,776 INFO L175 Difference]: Start difference. First operand has 672 places, 605 transitions, 11572 flow. Second operand 16 states and 109 transitions. [2024-06-27 16:40:26,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 686 places, 623 transitions, 13225 flow [2024-06-27 16:40:30,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 661 places, 623 transitions, 12656 flow, removed 147 selfloop flow, removed 25 redundant places. [2024-06-27 16:40:30,391 INFO L231 Difference]: Finished difference. Result has 662 places, 604 transitions, 11384 flow [2024-06-27 16:40:30,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11005, PETRI_DIFFERENCE_MINUEND_PLACES=646, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=11384, PETRI_PLACES=662, PETRI_TRANSITIONS=604} [2024-06-27 16:40:30,392 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 640 predicate places. [2024-06-27 16:40:30,392 INFO L495 AbstractCegarLoop]: Abstraction has has 662 places, 604 transitions, 11384 flow [2024-06-27 16:40:30,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.655172413793103) internal successors, (135), 29 states have internal predecessors, (135), 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 16:40:30,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:40:30,392 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:40:30,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2024-06-27 16:40:30,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2024-06-27 16:40:30,599 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:40:30,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:40:30,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1090381437, now seen corresponding path program 140 times [2024-06-27 16:40:30,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:40:30,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017762280] [2024-06-27 16:40:30,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:40:30,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:40:30,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:40:31,142 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:40:31,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:40:31,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017762280] [2024-06-27 16:40:31,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017762280] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:40:31,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907683748] [2024-06-27 16:40:31,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:40:31,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:40:31,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:40:31,144 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:40:31,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2024-06-27 16:40:31,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:40:31,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:40:31,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 39 conjunts are in the unsatisfiable core [2024-06-27 16:40:31,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:40:31,827 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:40:31,827 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 46 treesize of output 30 [2024-06-27 16:40:31,863 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:40:31,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:40:32,030 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-06-27 16:40:32,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-06-27 16:40:32,065 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:40:32,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907683748] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:40:32,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:40:32,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 30 [2024-06-27 16:40:32,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384811428] [2024-06-27 16:40:32,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:40:32,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:40:32,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:40:32,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:40:32,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:40:32,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:40:32,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 662 places, 604 transitions, 11384 flow. Second operand has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 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 16:40:32,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:40:32,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:40:32,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:40:34,221 INFO L124 PetriNetUnfolderBase]: 2154/4000 cut-off events. [2024-06-27 16:40:34,221 INFO L125 PetriNetUnfolderBase]: For 669555/669555 co-relation queries the response was YES. [2024-06-27 16:40:34,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64158 conditions, 4000 events. 2154/4000 cut-off events. For 669555/669555 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 27382 event pairs, 157 based on Foata normal form. 4/4002 useless extension candidates. Maximal degree in co-relation 63929. Up to 2490 conditions per place. [2024-06-27 16:40:34,308 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 434 selfloop transitions, 208 changer transitions 0/643 dead transitions. [2024-06-27 16:40:34,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 682 places, 643 transitions, 13966 flow [2024-06-27 16:40:34,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 16:40:34,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 16:40:34,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 157 transitions. [2024-06-27 16:40:34,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3102766798418972 [2024-06-27 16:40:34,309 INFO L175 Difference]: Start difference. First operand has 662 places, 604 transitions, 11384 flow. Second operand 23 states and 157 transitions. [2024-06-27 16:40:34,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 682 places, 643 transitions, 13966 flow [2024-06-27 16:40:38,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 668 places, 643 transitions, 13580 flow, removed 1 selfloop flow, removed 14 redundant places. [2024-06-27 16:40:38,196 INFO L231 Difference]: Finished difference. Result has 669 places, 607 transitions, 11579 flow [2024-06-27 16:40:38,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=10998, PETRI_DIFFERENCE_MINUEND_PLACES=646, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=11579, PETRI_PLACES=669, PETRI_TRANSITIONS=607} [2024-06-27 16:40:38,197 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 647 predicate places. [2024-06-27 16:40:38,197 INFO L495 AbstractCegarLoop]: Abstraction has has 669 places, 607 transitions, 11579 flow [2024-06-27 16:40:38,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 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 16:40:38,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:40:38,197 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:40:38,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2024-06-27 16:40:38,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2024-06-27 16:40:38,400 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:40:38,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:40:38,400 INFO L85 PathProgramCache]: Analyzing trace with hash -137768259, now seen corresponding path program 141 times [2024-06-27 16:40:38,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:40:38,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494060258] [2024-06-27 16:40:38,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:40:38,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:40:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:40:38,981 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:40:38,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:40:38,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494060258] [2024-06-27 16:40:38,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494060258] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:40:38,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322861217] [2024-06-27 16:40:38,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:40:38,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:40:38,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:40:38,984 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:40:38,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2024-06-27 16:40:39,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:40:39,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:40:39,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 35 conjunts are in the unsatisfiable core [2024-06-27 16:40:39,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:40:39,693 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 16:40:39,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-06-27 16:40:39,695 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:40:39,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:40:39,832 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-06-27 16:40:39,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-06-27 16:40:39,880 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:40:39,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322861217] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:40:39,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:40:39,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 28 [2024-06-27 16:40:39,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631451526] [2024-06-27 16:40:39,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:40:39,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-06-27 16:40:39,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:40:39,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-06-27 16:40:39,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2024-06-27 16:40:39,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:40:39,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 669 places, 607 transitions, 11579 flow. Second operand has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 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 16:40:39,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:40:39,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:40:39,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:40:41,732 INFO L124 PetriNetUnfolderBase]: 2178/4040 cut-off events. [2024-06-27 16:40:41,732 INFO L125 PetriNetUnfolderBase]: For 684043/684043 co-relation queries the response was YES. [2024-06-27 16:40:41,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65424 conditions, 4040 events. 2178/4040 cut-off events. For 684043/684043 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 27690 event pairs, 166 based on Foata normal form. 4/4042 useless extension candidates. Maximal degree in co-relation 65195. Up to 2581 conditions per place. [2024-06-27 16:40:41,823 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 441 selfloop transitions, 200 changer transitions 0/642 dead transitions. [2024-06-27 16:40:41,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 688 places, 642 transitions, 14110 flow [2024-06-27 16:40:41,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-27 16:40:41,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-27 16:40:41,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 135 transitions. [2024-06-27 16:40:41,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3068181818181818 [2024-06-27 16:40:41,825 INFO L175 Difference]: Start difference. First operand has 669 places, 607 transitions, 11579 flow. Second operand 20 states and 135 transitions. [2024-06-27 16:40:41,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 688 places, 642 transitions, 14110 flow [2024-06-27 16:40:45,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 668 places, 642 transitions, 13505 flow, removed 92 selfloop flow, removed 20 redundant places. [2024-06-27 16:40:45,746 INFO L231 Difference]: Finished difference. Result has 669 places, 611 transitions, 11578 flow [2024-06-27 16:40:45,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11072, PETRI_DIFFERENCE_MINUEND_PLACES=649, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=11578, PETRI_PLACES=669, PETRI_TRANSITIONS=611} [2024-06-27 16:40:45,747 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 647 predicate places. [2024-06-27 16:40:45,747 INFO L495 AbstractCegarLoop]: Abstraction has has 669 places, 611 transitions, 11578 flow [2024-06-27 16:40:45,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 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 16:40:45,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:40:45,748 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:40:45,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2024-06-27 16:40:45,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:40:45,965 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:40:45,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:40:45,965 INFO L85 PathProgramCache]: Analyzing trace with hash -845164012, now seen corresponding path program 142 times [2024-06-27 16:40:45,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:40:45,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095900025] [2024-06-27 16:40:45,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:40:45,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:40:45,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:40:46,632 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:40:46,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:40:46,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095900025] [2024-06-27 16:40:46,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095900025] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:40:46,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443046813] [2024-06-27 16:40:46,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:40:46,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:40:46,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:40:46,634 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:40:46,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2024-06-27 16:40:47,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:40:47,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:40:47,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:40:47,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:40:47,351 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:40:47,351 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 58 treesize of output 34 [2024-06-27 16:40:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:40:47,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:40:47,661 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:40:47,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-06-27 16:40:47,744 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:40:47,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443046813] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:40:47,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:40:47,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 11] total 32 [2024-06-27 16:40:47,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8256999] [2024-06-27 16:40:47,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:40:47,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-06-27 16:40:47,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:40:47,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-06-27 16:40:47,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2024-06-27 16:40:47,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:40:47,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 669 places, 611 transitions, 11578 flow. Second operand has 32 states, 32 states have (on average 4.65625) internal successors, (149), 32 states have internal predecessors, (149), 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 16:40:47,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:40:47,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:40:47,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:40:50,668 INFO L124 PetriNetUnfolderBase]: 2253/4187 cut-off events. [2024-06-27 16:40:50,669 INFO L125 PetriNetUnfolderBase]: For 764644/764644 co-relation queries the response was YES. [2024-06-27 16:40:50,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69366 conditions, 4187 events. 2253/4187 cut-off events. For 764644/764644 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 28896 event pairs, 590 based on Foata normal form. 22/4207 useless extension candidates. Maximal degree in co-relation 69136. Up to 3669 conditions per place. [2024-06-27 16:40:50,774 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 613 selfloop transitions, 108 changer transitions 14/736 dead transitions. [2024-06-27 16:40:50,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 707 places, 736 transitions, 17154 flow [2024-06-27 16:40:50,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-06-27 16:40:50,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-06-27 16:40:50,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 300 transitions. [2024-06-27 16:40:50,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34965034965034963 [2024-06-27 16:40:50,776 INFO L175 Difference]: Start difference. First operand has 669 places, 611 transitions, 11578 flow. Second operand 39 states and 300 transitions. [2024-06-27 16:40:50,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 707 places, 736 transitions, 17154 flow [2024-06-27 16:40:55,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 687 places, 736 transitions, 16685 flow, removed 24 selfloop flow, removed 20 redundant places. [2024-06-27 16:40:55,359 INFO L231 Difference]: Finished difference. Result has 700 places, 641 transitions, 13364 flow [2024-06-27 16:40:55,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11133, PETRI_DIFFERENCE_MINUEND_PLACES=649, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=13364, PETRI_PLACES=700, PETRI_TRANSITIONS=641} [2024-06-27 16:40:55,360 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 678 predicate places. [2024-06-27 16:40:55,360 INFO L495 AbstractCegarLoop]: Abstraction has has 700 places, 641 transitions, 13364 flow [2024-06-27 16:40:55,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.65625) internal successors, (149), 32 states have internal predecessors, (149), 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 16:40:55,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:40:55,360 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:40:55,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2024-06-27 16:40:55,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:40:55,572 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:40:55,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:40:55,573 INFO L85 PathProgramCache]: Analyzing trace with hash 451537624, now seen corresponding path program 143 times [2024-06-27 16:40:55,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:40:55,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683168490] [2024-06-27 16:40:55,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:40:55,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:40:55,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:40:56,200 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:40:56,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:40:56,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683168490] [2024-06-27 16:40:56,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683168490] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:40:56,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086770254] [2024-06-27 16:40:56,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:40:56,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:40:56,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:40:56,202 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:40:56,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2024-06-27 16:40:56,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:40:56,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:40:56,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:40:56,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:40:57,000 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:40:57,000 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 52 treesize of output 34 [2024-06-27 16:40:57,036 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:40:57,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:40:57,174 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:40:57,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-06-27 16:40:57,249 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:40:57,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086770254] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:40:57,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:40:57,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 9] total 32 [2024-06-27 16:40:57,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288737199] [2024-06-27 16:40:57,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:40:57,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-06-27 16:40:57,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:40:57,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-06-27 16:40:57,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2024-06-27 16:40:57,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:40:57,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 700 places, 641 transitions, 13364 flow. Second operand has 32 states, 32 states have (on average 4.84375) internal successors, (155), 32 states have internal predecessors, (155), 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 16:40:57,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:40:57,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:40:57,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:40:59,539 INFO L124 PetriNetUnfolderBase]: 2251/4190 cut-off events. [2024-06-27 16:40:59,539 INFO L125 PetriNetUnfolderBase]: For 835710/835710 co-relation queries the response was YES. [2024-06-27 16:40:59,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71440 conditions, 4190 events. 2251/4190 cut-off events. For 835710/835710 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 28944 event pairs, 871 based on Foata normal form. 5/4193 useless extension candidates. Maximal degree in co-relation 71198. Up to 3687 conditions per place. [2024-06-27 16:40:59,632 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 555 selfloop transitions, 103 changer transitions 1/660 dead transitions. [2024-06-27 16:40:59,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 714 places, 660 transitions, 15167 flow [2024-06-27 16:40:59,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 16:40:59,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 16:40:59,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 114 transitions. [2024-06-27 16:40:59,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32386363636363635 [2024-06-27 16:40:59,633 INFO L175 Difference]: Start difference. First operand has 700 places, 641 transitions, 13364 flow. Second operand 16 states and 114 transitions. [2024-06-27 16:40:59,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 714 places, 660 transitions, 15167 flow [2024-06-27 16:41:04,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 695 places, 660 transitions, 13553 flow, removed 754 selfloop flow, removed 19 redundant places. [2024-06-27 16:41:04,101 INFO L231 Difference]: Finished difference. Result has 696 places, 642 transitions, 12037 flow [2024-06-27 16:41:04,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11752, PETRI_DIFFERENCE_MINUEND_PLACES=680, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=12037, PETRI_PLACES=696, PETRI_TRANSITIONS=642} [2024-06-27 16:41:04,102 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 674 predicate places. [2024-06-27 16:41:04,102 INFO L495 AbstractCegarLoop]: Abstraction has has 696 places, 642 transitions, 12037 flow [2024-06-27 16:41:04,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.84375) internal successors, (155), 32 states have internal predecessors, (155), 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 16:41:04,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:41:04,102 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:41:04,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2024-06-27 16:41:04,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:04,316 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:41:04,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:41:04,317 INFO L85 PathProgramCache]: Analyzing trace with hash -326529470, now seen corresponding path program 144 times [2024-06-27 16:41:04,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:41:04,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515371853] [2024-06-27 16:41:04,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:41:04,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:41:04,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:04,915 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:41:04,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:41:04,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515371853] [2024-06-27 16:41:04,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515371853] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:41:04,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764823225] [2024-06-27 16:41:04,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:41:04,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:04,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:41:04,917 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:41:04,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2024-06-27 16:41:05,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 16:41:05,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:41:05,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 35 conjunts are in the unsatisfiable core [2024-06-27 16:41:05,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:41:05,636 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:41:05,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:41:05,774 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-06-27 16:41:05,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-06-27 16:41:05,814 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:41:05,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764823225] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:41:05,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:41:05,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 29 [2024-06-27 16:41:05,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739580748] [2024-06-27 16:41:05,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:41:05,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:41:05,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:41:05,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:41:05,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:41:05,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:41:05,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 696 places, 642 transitions, 12037 flow. Second operand has 29 states, 29 states have (on average 4.758620689655173) internal successors, (138), 29 states have internal predecessors, (138), 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 16:41:05,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:41:05,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:41:05,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:41:07,724 INFO L124 PetriNetUnfolderBase]: 2250/4191 cut-off events. [2024-06-27 16:41:07,724 INFO L125 PetriNetUnfolderBase]: For 765168/765168 co-relation queries the response was YES. [2024-06-27 16:41:07,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68212 conditions, 4191 events. 2250/4191 cut-off events. For 765168/765168 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 29056 event pairs, 633 based on Foata normal form. 2/4189 useless extension candidates. Maximal degree in co-relation 67972. Up to 2801 conditions per place. [2024-06-27 16:41:07,825 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 457 selfloop transitions, 194 changer transitions 6/658 dead transitions. [2024-06-27 16:41:07,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 711 places, 658 transitions, 13757 flow [2024-06-27 16:41:07,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 16:41:07,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 16:41:07,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 107 transitions. [2024-06-27 16:41:07,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3039772727272727 [2024-06-27 16:41:07,826 INFO L175 Difference]: Start difference. First operand has 696 places, 642 transitions, 12037 flow. Second operand 16 states and 107 transitions. [2024-06-27 16:41:07,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 711 places, 658 transitions, 13757 flow [2024-06-27 16:41:12,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 697 places, 658 transitions, 13499 flow, removed 28 selfloop flow, removed 14 redundant places. [2024-06-27 16:41:12,364 INFO L231 Difference]: Finished difference. Result has 698 places, 639 transitions, 12124 flow [2024-06-27 16:41:12,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11779, PETRI_DIFFERENCE_MINUEND_PLACES=682, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=12124, PETRI_PLACES=698, PETRI_TRANSITIONS=639} [2024-06-27 16:41:12,365 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 676 predicate places. [2024-06-27 16:41:12,365 INFO L495 AbstractCegarLoop]: Abstraction has has 698 places, 639 transitions, 12124 flow [2024-06-27 16:41:12,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.758620689655173) internal successors, (138), 29 states have internal predecessors, (138), 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 16:41:12,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:41:12,366 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:41:12,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2024-06-27 16:41:12,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:12,579 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:41:12,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:41:12,580 INFO L85 PathProgramCache]: Analyzing trace with hash -75609398, now seen corresponding path program 145 times [2024-06-27 16:41:12,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:41:12,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379234573] [2024-06-27 16:41:12,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:41:12,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:41:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:13,105 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:41:13,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:41:13,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379234573] [2024-06-27 16:41:13,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379234573] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:41:13,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111161439] [2024-06-27 16:41:13,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:41:13,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:13,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:41:13,107 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:41:13,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2024-06-27 16:41:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:13,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:41:13,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:41:13,745 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-06-27 16:41:13,746 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 33 treesize of output 9 [2024-06-27 16:41:13,748 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:41:13,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:41:13,844 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:41:13,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-06-27 16:41:13,880 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:41:13,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111161439] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:41:13,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:41:13,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-06-27 16:41:13,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82425573] [2024-06-27 16:41:13,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:41:13,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:41:13,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:41:13,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:41:13,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:41:13,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:41:13,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 698 places, 639 transitions, 12124 flow. Second operand has 29 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 states have internal predecessors, (139), 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 16:41:13,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:41:13,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:41:13,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:41:15,962 INFO L124 PetriNetUnfolderBase]: 2277/4240 cut-off events. [2024-06-27 16:41:15,963 INFO L125 PetriNetUnfolderBase]: For 792256/792256 co-relation queries the response was YES. [2024-06-27 16:41:16,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69833 conditions, 4240 events. 2277/4240 cut-off events. For 792256/792256 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29364 event pairs, 991 based on Foata normal form. 10/4246 useless extension candidates. Maximal degree in co-relation 69592. Up to 3963 conditions per place. [2024-06-27 16:41:16,066 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 618 selfloop transitions, 61 changer transitions 0/680 dead transitions. [2024-06-27 16:41:16,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 714 places, 680 transitions, 14716 flow [2024-06-27 16:41:16,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 16:41:16,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 16:41:16,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 155 transitions. [2024-06-27 16:41:16,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3202479338842975 [2024-06-27 16:41:16,067 INFO L175 Difference]: Start difference. First operand has 698 places, 639 transitions, 12124 flow. Second operand 22 states and 155 transitions. [2024-06-27 16:41:16,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 714 places, 680 transitions, 14716 flow [2024-06-27 16:41:20,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 701 places, 680 transitions, 14320 flow, removed 1 selfloop flow, removed 13 redundant places. [2024-06-27 16:41:20,679 INFO L231 Difference]: Finished difference. Result has 705 places, 643 transitions, 12090 flow [2024-06-27 16:41:20,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11734, PETRI_DIFFERENCE_MINUEND_PLACES=680, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=12090, PETRI_PLACES=705, PETRI_TRANSITIONS=643} [2024-06-27 16:41:20,680 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 683 predicate places. [2024-06-27 16:41:20,680 INFO L495 AbstractCegarLoop]: Abstraction has has 705 places, 643 transitions, 12090 flow [2024-06-27 16:41:20,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 states have internal predecessors, (139), 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 16:41:20,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:41:20,681 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:41:20,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2024-06-27 16:41:20,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:20,894 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:41:20,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:41:20,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1863368514, now seen corresponding path program 146 times [2024-06-27 16:41:20,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:41:20,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145421074] [2024-06-27 16:41:20,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:41:20,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:41:20,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:21,555 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:41:21,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:41:21,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145421074] [2024-06-27 16:41:21,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145421074] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:41:21,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202488833] [2024-06-27 16:41:21,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:41:21,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:21,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:41:21,557 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:41:21,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2024-06-27 16:41:22,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:41:22,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:41:22,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 41 conjunts are in the unsatisfiable core [2024-06-27 16:41:22,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:41:22,240 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:41:22,240 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 65 treesize of output 41 [2024-06-27 16:41:22,272 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:41:22,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:41:22,400 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-06-27 16:41:22,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-06-27 16:41:22,434 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:41:22,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202488833] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:41:22,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:41:22,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 31 [2024-06-27 16:41:22,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690769649] [2024-06-27 16:41:22,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:41:22,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-27 16:41:22,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:41:22,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-27 16:41:22,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2024-06-27 16:41:22,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:41:22,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 705 places, 643 transitions, 12090 flow. Second operand has 31 states, 31 states have (on average 4.67741935483871) internal successors, (145), 31 states have internal predecessors, (145), 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 16:41:22,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:41:22,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:41:22,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:41:24,699 INFO L124 PetriNetUnfolderBase]: 2273/4228 cut-off events. [2024-06-27 16:41:24,700 INFO L125 PetriNetUnfolderBase]: For 796550/796550 co-relation queries the response was YES. [2024-06-27 16:41:24,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69606 conditions, 4228 events. 2273/4228 cut-off events. For 796550/796550 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 29248 event pairs, 638 based on Foata normal form. 2/4226 useless extension candidates. Maximal degree in co-relation 69362. Up to 2823 conditions per place. [2024-06-27 16:41:24,802 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 460 selfloop transitions, 199 changer transitions 2/662 dead transitions. [2024-06-27 16:41:24,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 721 places, 662 transitions, 13991 flow [2024-06-27 16:41:24,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 16:41:24,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 16:41:24,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 117 transitions. [2024-06-27 16:41:24,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31283422459893045 [2024-06-27 16:41:24,803 INFO L175 Difference]: Start difference. First operand has 705 places, 643 transitions, 12090 flow. Second operand 17 states and 117 transitions. [2024-06-27 16:41:24,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 721 places, 662 transitions, 13991 flow [2024-06-27 16:41:29,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 702 places, 662 transitions, 13690 flow, removed 68 selfloop flow, removed 19 redundant places. [2024-06-27 16:41:29,426 INFO L231 Difference]: Finished difference. Result has 702 places, 641 transitions, 12170 flow [2024-06-27 16:41:29,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11779, PETRI_DIFFERENCE_MINUEND_PLACES=686, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=12170, PETRI_PLACES=702, PETRI_TRANSITIONS=641} [2024-06-27 16:41:29,427 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 680 predicate places. [2024-06-27 16:41:29,427 INFO L495 AbstractCegarLoop]: Abstraction has has 702 places, 641 transitions, 12170 flow [2024-06-27 16:41:29,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.67741935483871) internal successors, (145), 31 states have internal predecessors, (145), 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 16:41:29,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:41:29,427 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:41:29,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2024-06-27 16:41:29,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:29,640 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:41:29,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:41:29,641 INFO L85 PathProgramCache]: Analyzing trace with hash 2011028277, now seen corresponding path program 147 times [2024-06-27 16:41:29,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:41:29,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643919970] [2024-06-27 16:41:29,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:41:29,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:41:29,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:30,163 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:41:30,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:41:30,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643919970] [2024-06-27 16:41:30,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643919970] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:41:30,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482320930] [2024-06-27 16:41:30,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:41:30,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:30,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:41:30,165 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:41:30,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2024-06-27 16:41:30,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:41:30,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:41:30,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:41:30,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:41:30,880 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:41:30,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:41:30,989 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-06-27 16:41:30,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-06-27 16:41:31,016 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:41:31,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482320930] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:41:31,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:41:31,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 28 [2024-06-27 16:41:31,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394275536] [2024-06-27 16:41:31,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:41:31,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-06-27 16:41:31,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:41:31,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-06-27 16:41:31,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2024-06-27 16:41:31,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:41:31,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 702 places, 641 transitions, 12170 flow. Second operand has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 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 16:41:31,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:41:31,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:41:31,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:41:32,943 INFO L124 PetriNetUnfolderBase]: 2327/4311 cut-off events. [2024-06-27 16:41:32,945 INFO L125 PetriNetUnfolderBase]: For 806435/806435 co-relation queries the response was YES. [2024-06-27 16:41:33,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71679 conditions, 4311 events. 2327/4311 cut-off events. For 806435/806435 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 29862 event pairs, 160 based on Foata normal form. 4/4311 useless extension candidates. Maximal degree in co-relation 71436. Up to 2750 conditions per place. [2024-06-27 16:41:33,049 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 466 selfloop transitions, 210 changer transitions 0/677 dead transitions. [2024-06-27 16:41:33,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 715 places, 677 transitions, 14786 flow [2024-06-27 16:41:33,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-27 16:41:33,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-27 16:41:33,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 121 transitions. [2024-06-27 16:41:33,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3055555555555556 [2024-06-27 16:41:33,050 INFO L175 Difference]: Start difference. First operand has 702 places, 641 transitions, 12170 flow. Second operand 18 states and 121 transitions. [2024-06-27 16:41:33,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 715 places, 677 transitions, 14786 flow [2024-06-27 16:41:37,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 700 places, 677 transitions, 14533 flow, removed 2 selfloop flow, removed 15 redundant places. [2024-06-27 16:41:37,834 INFO L231 Difference]: Finished difference. Result has 703 places, 650 transitions, 12614 flow [2024-06-27 16:41:37,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11904, PETRI_DIFFERENCE_MINUEND_PLACES=683, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=12614, PETRI_PLACES=703, PETRI_TRANSITIONS=650} [2024-06-27 16:41:37,835 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 681 predicate places. [2024-06-27 16:41:37,835 INFO L495 AbstractCegarLoop]: Abstraction has has 703 places, 650 transitions, 12614 flow [2024-06-27 16:41:37,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.821428571428571) internal successors, (135), 28 states have internal predecessors, (135), 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 16:41:37,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:41:37,836 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:41:37,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2024-06-27 16:41:38,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2024-06-27 16:41:38,049 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:41:38,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:41:38,049 INFO L85 PathProgramCache]: Analyzing trace with hash 70793469, now seen corresponding path program 148 times [2024-06-27 16:41:38,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:41:38,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497079248] [2024-06-27 16:41:38,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:41:38,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:41:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:38,531 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:41:38,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:41:38,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497079248] [2024-06-27 16:41:38,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497079248] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:41:38,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292180118] [2024-06-27 16:41:38,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:41:38,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:38,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:41:38,533 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:41:38,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2024-06-27 16:41:39,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:41:39,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:41:39,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 16:41:39,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:41:39,194 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:41:39,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:41:39,296 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:41:39,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-06-27 16:41:39,354 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:41:39,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292180118] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:41:39,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:41:39,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-06-27 16:41:39,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220441928] [2024-06-27 16:41:39,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:41:39,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:41:39,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:41:39,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:41:39,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:41:39,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:41:39,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 703 places, 650 transitions, 12614 flow. Second operand has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 29 states have internal predecessors, (137), 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 16:41:39,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:41:39,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:41:39,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:41:41,959 INFO L124 PetriNetUnfolderBase]: 2329/4317 cut-off events. [2024-06-27 16:41:41,959 INFO L125 PetriNetUnfolderBase]: For 809336/809336 co-relation queries the response was YES. [2024-06-27 16:41:42,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72055 conditions, 4317 events. 2329/4317 cut-off events. For 809336/809336 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 30030 event pairs, 849 based on Foata normal form. 8/4321 useless extension candidates. Maximal degree in co-relation 71810. Up to 3681 conditions per place. [2024-06-27 16:41:42,086 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 555 selfloop transitions, 130 changer transitions 0/686 dead transitions. [2024-06-27 16:41:42,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 725 places, 686 transitions, 15157 flow [2024-06-27 16:41:42,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 16:41:42,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 16:41:42,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 161 transitions. [2024-06-27 16:41:42,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-06-27 16:41:42,087 INFO L175 Difference]: Start difference. First operand has 703 places, 650 transitions, 12614 flow. Second operand 23 states and 161 transitions. [2024-06-27 16:41:42,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 725 places, 686 transitions, 15157 flow [2024-06-27 16:41:46,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 711 places, 686 transitions, 14758 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-06-27 16:41:46,880 INFO L231 Difference]: Finished difference. Result has 712 places, 650 transitions, 12495 flow [2024-06-27 16:41:46,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12197, PETRI_DIFFERENCE_MINUEND_PLACES=689, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12495, PETRI_PLACES=712, PETRI_TRANSITIONS=650} [2024-06-27 16:41:46,882 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 690 predicate places. [2024-06-27 16:41:46,882 INFO L495 AbstractCegarLoop]: Abstraction has has 712 places, 650 transitions, 12495 flow [2024-06-27 16:41:46,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 29 states have internal predecessors, (137), 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 16:41:46,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:41:46,883 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:41:46,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2024-06-27 16:41:47,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2024-06-27 16:41:47,096 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:41:47,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:41:47,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1466136480, now seen corresponding path program 149 times [2024-06-27 16:41:47,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:41:47,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886853638] [2024-06-27 16:41:47,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:41:47,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:41:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:47,716 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:41:47,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:41:47,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886853638] [2024-06-27 16:41:47,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886853638] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:41:47,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031754281] [2024-06-27 16:41:47,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:41:47,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:47,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:41:47,718 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:41:47,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2024-06-27 16:41:48,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:41:48,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:41:48,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 35 conjunts are in the unsatisfiable core [2024-06-27 16:41:48,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:41:48,487 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:41:48,488 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 73 treesize of output 45 [2024-06-27 16:41:48,526 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:41:48,526 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:41:48,678 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:41:48,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-06-27 16:41:48,743 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:41:48,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031754281] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:41:48,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:41:48,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 9] total 33 [2024-06-27 16:41:48,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271825130] [2024-06-27 16:41:48,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:41:48,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 16:41:48,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:41:48,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 16:41:48,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 16:41:48,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:41:48,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 712 places, 650 transitions, 12495 flow. Second operand has 33 states, 33 states have (on average 4.848484848484849) internal successors, (160), 33 states have internal predecessors, (160), 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 16:41:48,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:41:48,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:41:48,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:41:51,685 INFO L124 PetriNetUnfolderBase]: 2389/4439 cut-off events. [2024-06-27 16:41:51,685 INFO L125 PetriNetUnfolderBase]: For 874991/874991 co-relation queries the response was YES. [2024-06-27 16:41:51,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75248 conditions, 4439 events. 2389/4439 cut-off events. For 874991/874991 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 31018 event pairs, 965 based on Foata normal form. 10/4445 useless extension candidates. Maximal degree in co-relation 75002. Up to 3915 conditions per place. [2024-06-27 16:41:51,795 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 630 selfloop transitions, 100 changer transitions 4/735 dead transitions. [2024-06-27 16:41:51,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 742 places, 735 transitions, 16928 flow [2024-06-27 16:41:51,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-06-27 16:41:51,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-06-27 16:41:51,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 231 transitions. [2024-06-27 16:41:51,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-06-27 16:41:51,797 INFO L175 Difference]: Start difference. First operand has 712 places, 650 transitions, 12495 flow. Second operand 31 states and 231 transitions. [2024-06-27 16:41:51,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 742 places, 735 transitions, 16928 flow [2024-06-27 16:41:56,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 722 places, 735 transitions, 16674 flow, removed 1 selfloop flow, removed 20 redundant places. [2024-06-27 16:41:56,930 INFO L231 Difference]: Finished difference. Result has 728 places, 663 transitions, 13508 flow [2024-06-27 16:41:56,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12241, PETRI_DIFFERENCE_MINUEND_PLACES=692, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=13508, PETRI_PLACES=728, PETRI_TRANSITIONS=663} [2024-06-27 16:41:56,931 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 706 predicate places. [2024-06-27 16:41:56,931 INFO L495 AbstractCegarLoop]: Abstraction has has 728 places, 663 transitions, 13508 flow [2024-06-27 16:41:56,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.848484848484849) internal successors, (160), 33 states have internal predecessors, (160), 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 16:41:56,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:41:56,932 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:41:56,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2024-06-27 16:41:57,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2024-06-27 16:41:57,145 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:41:57,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:41:57,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1198555342, now seen corresponding path program 150 times [2024-06-27 16:41:57,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:41:57,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377783364] [2024-06-27 16:41:57,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:41:57,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:41:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:41:57,733 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:41:57,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:41:57,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377783364] [2024-06-27 16:41:57,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377783364] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:41:57,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388633076] [2024-06-27 16:41:57,733 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:41:57,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:41:57,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:41:57,735 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:41:57,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2024-06-27 16:41:58,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:41:58,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:41:58,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:41:58,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:41:58,431 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:41:58,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:41:58,530 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:41:58,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-06-27 16:41:58,597 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:41:58,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388633076] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:41:58,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:41:58,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 29 [2024-06-27 16:41:58,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975585427] [2024-06-27 16:41:58,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:41:58,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:41:58,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:41:58,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:41:58,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:41:58,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:41:58,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 728 places, 663 transitions, 13508 flow. Second operand has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 29 states have internal predecessors, (137), 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 16:41:58,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:41:58,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:41:58,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:00,834 INFO L124 PetriNetUnfolderBase]: 2389/4445 cut-off events. [2024-06-27 16:42:00,834 INFO L125 PetriNetUnfolderBase]: For 923693/923693 co-relation queries the response was YES. [2024-06-27 16:42:00,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76726 conditions, 4445 events. 2389/4445 cut-off events. For 923693/923693 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 31214 event pairs, 945 based on Foata normal form. 2/4443 useless extension candidates. Maximal degree in co-relation 76474. Up to 3974 conditions per place. [2024-06-27 16:42:00,953 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 572 selfloop transitions, 97 changer transitions 7/677 dead transitions. [2024-06-27 16:42:00,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 743 places, 677 transitions, 15055 flow [2024-06-27 16:42:00,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 16:42:00,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 16:42:00,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 106 transitions. [2024-06-27 16:42:00,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30113636363636365 [2024-06-27 16:42:00,955 INFO L175 Difference]: Start difference. First operand has 728 places, 663 transitions, 13508 flow. Second operand 16 states and 106 transitions. [2024-06-27 16:42:00,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 743 places, 677 transitions, 15055 flow [2024-06-27 16:42:06,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 720 places, 677 transitions, 14195 flow, removed 363 selfloop flow, removed 23 redundant places. [2024-06-27 16:42:06,550 INFO L231 Difference]: Finished difference. Result has 721 places, 661 transitions, 12813 flow [2024-06-27 16:42:06,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12648, PETRI_DIFFERENCE_MINUEND_PLACES=705, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=12813, PETRI_PLACES=721, PETRI_TRANSITIONS=661} [2024-06-27 16:42:06,551 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 699 predicate places. [2024-06-27 16:42:06,551 INFO L495 AbstractCegarLoop]: Abstraction has has 721 places, 661 transitions, 12813 flow [2024-06-27 16:42:06,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 29 states have internal predecessors, (137), 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 16:42:06,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:06,551 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:06,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2024-06-27 16:42:06,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:06,764 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:42:06,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:06,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1979010498, now seen corresponding path program 151 times [2024-06-27 16:42:06,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:06,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147897653] [2024-06-27 16:42:06,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:06,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:42:07,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:07,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147897653] [2024-06-27 16:42:07,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147897653] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:42:07,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054512865] [2024-06-27 16:42:07,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:42:07,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:07,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:42:07,286 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:42:07,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2024-06-27 16:42:07,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:07,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 16:42:07,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:42:07,921 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:42:07,922 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 81 treesize of output 45 [2024-06-27 16:42:07,958 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:42:07,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:42:08,068 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:42:08,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-06-27 16:42:08,126 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:42:08,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054512865] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:42:08,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:42:08,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-06-27 16:42:08,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102763159] [2024-06-27 16:42:08,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:42:08,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:42:08,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:08,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:42:08,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:42:08,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:42:08,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 721 places, 661 transitions, 12813 flow. Second operand has 29 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 states have internal predecessors, (139), 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 16:42:08,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:08,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:42:08,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:10,796 INFO L124 PetriNetUnfolderBase]: 2390/4432 cut-off events. [2024-06-27 16:42:10,796 INFO L125 PetriNetUnfolderBase]: For 884961/884961 co-relation queries the response was YES. [2024-06-27 16:42:10,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75243 conditions, 4432 events. 2390/4432 cut-off events. For 884961/884961 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 31063 event pairs, 906 based on Foata normal form. 10/4438 useless extension candidates. Maximal degree in co-relation 74990. Up to 3841 conditions per place. [2024-06-27 16:42:10,899 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 586 selfloop transitions, 124 changer transitions 4/715 dead transitions. [2024-06-27 16:42:10,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 744 places, 715 transitions, 15813 flow [2024-06-27 16:42:10,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-06-27 16:42:10,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-06-27 16:42:10,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 199 transitions. [2024-06-27 16:42:10,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32305194805194803 [2024-06-27 16:42:10,900 INFO L175 Difference]: Start difference. First operand has 721 places, 661 transitions, 12813 flow. Second operand 28 states and 199 transitions. [2024-06-27 16:42:10,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 744 places, 715 transitions, 15813 flow [2024-06-27 16:42:15,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 728 places, 715 transitions, 15415 flow, removed 21 selfloop flow, removed 16 redundant places. [2024-06-27 16:42:15,370 INFO L231 Difference]: Finished difference. Result has 730 places, 663 transitions, 12908 flow [2024-06-27 16:42:15,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12424, PETRI_DIFFERENCE_MINUEND_PLACES=701, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=12908, PETRI_PLACES=730, PETRI_TRANSITIONS=663} [2024-06-27 16:42:15,371 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 708 predicate places. [2024-06-27 16:42:15,371 INFO L495 AbstractCegarLoop]: Abstraction has has 730 places, 663 transitions, 12908 flow [2024-06-27 16:42:15,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 states have internal predecessors, (139), 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 16:42:15,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:15,371 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:15,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2024-06-27 16:42:15,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:15,572 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:42:15,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:15,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1305826592, now seen corresponding path program 152 times [2024-06-27 16:42:15,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:15,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611036630] [2024-06-27 16:42:15,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:15,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:15,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:16,210 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:42:16,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:16,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611036630] [2024-06-27 16:42:16,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611036630] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:42:16,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212608858] [2024-06-27 16:42:16,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:42:16,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:16,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:42:16,211 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:42:16,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2024-06-27 16:42:16,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:42:16,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:42:16,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 39 conjunts are in the unsatisfiable core [2024-06-27 16:42:16,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:42:16,927 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:42:16,928 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 46 treesize of output 30 [2024-06-27 16:42:16,964 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:42:16,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:42:17,071 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:42:17,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-06-27 16:42:17,148 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:42:17,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212608858] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:42:17,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:42:17,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 29 [2024-06-27 16:42:17,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759213303] [2024-06-27 16:42:17,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:42:17,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:42:17,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:17,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:42:17,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:42:17,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:42:17,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 730 places, 663 transitions, 12908 flow. Second operand has 29 states, 29 states have (on average 4.758620689655173) internal successors, (138), 29 states have internal predecessors, (138), 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 16:42:17,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:17,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:42:17,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:19,624 INFO L124 PetriNetUnfolderBase]: 2391/4440 cut-off events. [2024-06-27 16:42:19,624 INFO L125 PetriNetUnfolderBase]: For 894562/894562 co-relation queries the response was YES. [2024-06-27 16:42:19,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75114 conditions, 4440 events. 2391/4440 cut-off events. For 894562/894562 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 30990 event pairs, 1034 based on Foata normal form. 10/4446 useless extension candidates. Maximal degree in co-relation 74862. Up to 4128 conditions per place. [2024-06-27 16:42:19,740 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 620 selfloop transitions, 78 changer transitions 3/702 dead transitions. [2024-06-27 16:42:19,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 751 places, 702 transitions, 15159 flow [2024-06-27 16:42:19,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-06-27 16:42:19,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-06-27 16:42:19,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 171 transitions. [2024-06-27 16:42:19,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32386363636363635 [2024-06-27 16:42:19,742 INFO L175 Difference]: Start difference. First operand has 730 places, 663 transitions, 12908 flow. Second operand 24 states and 171 transitions. [2024-06-27 16:42:19,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 751 places, 702 transitions, 15159 flow [2024-06-27 16:42:25,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 725 places, 702 transitions, 14753 flow, removed 79 selfloop flow, removed 26 redundant places. [2024-06-27 16:42:25,653 INFO L231 Difference]: Finished difference. Result has 727 places, 664 transitions, 12739 flow [2024-06-27 16:42:25,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12508, PETRI_DIFFERENCE_MINUEND_PLACES=702, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=12739, PETRI_PLACES=727, PETRI_TRANSITIONS=664} [2024-06-27 16:42:25,654 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 705 predicate places. [2024-06-27 16:42:25,654 INFO L495 AbstractCegarLoop]: Abstraction has has 727 places, 664 transitions, 12739 flow [2024-06-27 16:42:25,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.758620689655173) internal successors, (138), 29 states have internal predecessors, (138), 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 16:42:25,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:25,654 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:25,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2024-06-27 16:42:25,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:25,867 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:42:25,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:25,868 INFO L85 PathProgramCache]: Analyzing trace with hash -324814662, now seen corresponding path program 153 times [2024-06-27 16:42:25,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:25,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038248120] [2024-06-27 16:42:25,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:25,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:25,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:26,479 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:42:26,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:26,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038248120] [2024-06-27 16:42:26,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038248120] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:42:26,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959575410] [2024-06-27 16:42:26,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:42:26,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:26,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:42:26,481 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:42:26,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2024-06-27 16:42:27,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:42:27,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:42:27,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:42:27,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:42:27,185 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:42:27,185 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 65 treesize of output 41 [2024-06-27 16:42:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:42:27,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:42:27,347 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:42:27,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-06-27 16:42:27,417 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:42:27,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959575410] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:42:27,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:42:27,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 29 [2024-06-27 16:42:27,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862880783] [2024-06-27 16:42:27,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:42:27,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:42:27,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:27,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:42:27,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:42:27,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:42:27,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 727 places, 664 transitions, 12739 flow. Second operand has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 29 states have internal predecessors, (137), 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 16:42:27,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:27,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:42:27,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:29,963 INFO L124 PetriNetUnfolderBase]: 2388/4435 cut-off events. [2024-06-27 16:42:29,963 INFO L125 PetriNetUnfolderBase]: For 896114/896114 co-relation queries the response was YES. [2024-06-27 16:42:30,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75064 conditions, 4435 events. 2388/4435 cut-off events. For 896114/896114 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 31047 event pairs, 922 based on Foata normal form. 2/4433 useless extension candidates. Maximal degree in co-relation 74812. Up to 3930 conditions per place. [2024-06-27 16:42:30,086 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 576 selfloop transitions, 102 changer transitions 6/685 dead transitions. [2024-06-27 16:42:30,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 743 places, 685 transitions, 14527 flow [2024-06-27 16:42:30,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 16:42:30,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 16:42:30,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 120 transitions. [2024-06-27 16:42:30,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32085561497326204 [2024-06-27 16:42:30,087 INFO L175 Difference]: Start difference. First operand has 727 places, 664 transitions, 12739 flow. Second operand 17 states and 120 transitions. [2024-06-27 16:42:30,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 743 places, 685 transitions, 14527 flow [2024-06-27 16:42:35,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 692 places, 685 transitions, 13879 flow, removed 73 selfloop flow, removed 51 redundant places. [2024-06-27 16:42:35,065 INFO L231 Difference]: Finished difference. Result has 692 places, 662 transitions, 12276 flow [2024-06-27 16:42:35,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12078, PETRI_DIFFERENCE_MINUEND_PLACES=676, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=12276, PETRI_PLACES=692, PETRI_TRANSITIONS=662} [2024-06-27 16:42:35,066 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 670 predicate places. [2024-06-27 16:42:35,066 INFO L495 AbstractCegarLoop]: Abstraction has has 692 places, 662 transitions, 12276 flow [2024-06-27 16:42:35,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 29 states have internal predecessors, (137), 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 16:42:35,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:35,067 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:35,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2024-06-27 16:42:35,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2024-06-27 16:42:35,280 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:42:35,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:35,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1718774207, now seen corresponding path program 154 times [2024-06-27 16:42:35,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:35,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790330345] [2024-06-27 16:42:35,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:35,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:35,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:35,785 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:42:35,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:35,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790330345] [2024-06-27 16:42:35,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790330345] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:42:35,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801999218] [2024-06-27 16:42:35,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:42:35,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:35,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:42:35,788 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:42:35,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2024-06-27 16:42:36,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:42:36,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:42:36,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:42:36,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:42:36,493 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:42:36,494 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 58 treesize of output 34 [2024-06-27 16:42:36,534 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:42:36,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:42:36,659 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:42:36,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-06-27 16:42:36,712 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:42:36,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801999218] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:42:36,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:42:36,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 28 [2024-06-27 16:42:36,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949432452] [2024-06-27 16:42:36,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:42:36,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-06-27 16:42:36,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:36,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-06-27 16:42:36,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2024-06-27 16:42:36,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:42:36,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 692 places, 662 transitions, 12276 flow. Second operand has 28 states, 28 states have (on average 4.678571428571429) internal successors, (131), 28 states have internal predecessors, (131), 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 16:42:36,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:36,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:42:36,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:39,242 INFO L124 PetriNetUnfolderBase]: 2387/4423 cut-off events. [2024-06-27 16:42:39,242 INFO L125 PetriNetUnfolderBase]: For 884741/884741 co-relation queries the response was YES. [2024-06-27 16:42:39,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74640 conditions, 4423 events. 2387/4423 cut-off events. For 884741/884741 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 30926 event pairs, 835 based on Foata normal form. 20/4439 useless extension candidates. Maximal degree in co-relation 74415. Up to 3699 conditions per place. [2024-06-27 16:42:39,353 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 559 selfloop transitions, 153 changer transitions 4/717 dead transitions. [2024-06-27 16:42:39,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 718 places, 717 transitions, 15904 flow [2024-06-27 16:42:39,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-06-27 16:42:39,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-06-27 16:42:39,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 213 transitions. [2024-06-27 16:42:39,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.312316715542522 [2024-06-27 16:42:39,354 INFO L175 Difference]: Start difference. First operand has 692 places, 662 transitions, 12276 flow. Second operand 31 states and 213 transitions. [2024-06-27 16:42:39,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 718 places, 717 transitions, 15904 flow [2024-06-27 16:42:44,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 702 places, 717 transitions, 15678 flow, removed 11 selfloop flow, removed 16 redundant places. [2024-06-27 16:42:44,441 INFO L231 Difference]: Finished difference. Result has 705 places, 666 transitions, 12868 flow [2024-06-27 16:42:44,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12011, PETRI_DIFFERENCE_MINUEND_PLACES=672, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=12868, PETRI_PLACES=705, PETRI_TRANSITIONS=666} [2024-06-27 16:42:44,442 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 683 predicate places. [2024-06-27 16:42:44,442 INFO L495 AbstractCegarLoop]: Abstraction has has 705 places, 666 transitions, 12868 flow [2024-06-27 16:42:44,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.678571428571429) internal successors, (131), 28 states have internal predecessors, (131), 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 16:42:44,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:44,442 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:44,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2024-06-27 16:42:44,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:44,652 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:42:44,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:44,653 INFO L85 PathProgramCache]: Analyzing trace with hash -344266374, now seen corresponding path program 155 times [2024-06-27 16:42:44,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:44,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078527693] [2024-06-27 16:42:44,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:44,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:45,198 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:42:45,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:45,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078527693] [2024-06-27 16:42:45,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078527693] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:42:45,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366597575] [2024-06-27 16:42:45,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:42:45,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:45,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:42:45,200 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:42:45,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2024-06-27 16:42:45,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:42:45,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:42:45,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 34 conjunts are in the unsatisfiable core [2024-06-27 16:42:45,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:42:46,054 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:42:46,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:42:46,148 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:42:46,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-06-27 16:42:46,227 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:42:46,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366597575] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:42:46,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:42:46,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 9] total 33 [2024-06-27 16:42:46,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016958703] [2024-06-27 16:42:46,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:42:46,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 16:42:46,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:46,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 16:42:46,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 16:42:46,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:42:46,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 705 places, 666 transitions, 12868 flow. Second operand has 33 states, 33 states have (on average 4.787878787878788) internal successors, (158), 33 states have internal predecessors, (158), 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 16:42:46,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:46,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:42:46,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:48,342 INFO L124 PetriNetUnfolderBase]: 2381/4417 cut-off events. [2024-06-27 16:42:48,342 INFO L125 PetriNetUnfolderBase]: For 920585/920585 co-relation queries the response was YES. [2024-06-27 16:42:48,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75684 conditions, 4417 events. 2381/4417 cut-off events. For 920585/920585 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 30855 event pairs, 1049 based on Foata normal form. 4/4417 useless extension candidates. Maximal degree in co-relation 75457. Up to 4206 conditions per place. [2024-06-27 16:42:48,440 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 614 selfloop transitions, 61 changer transitions 14/690 dead transitions. [2024-06-27 16:42:48,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 726 places, 690 transitions, 14412 flow [2024-06-27 16:42:48,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 16:42:48,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 16:42:48,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 144 transitions. [2024-06-27 16:42:48,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2975206611570248 [2024-06-27 16:42:48,441 INFO L175 Difference]: Start difference. First operand has 705 places, 666 transitions, 12868 flow. Second operand 22 states and 144 transitions. [2024-06-27 16:42:48,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 726 places, 690 transitions, 14412 flow [2024-06-27 16:42:53,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 702 places, 690 transitions, 13820 flow, removed 163 selfloop flow, removed 24 redundant places. [2024-06-27 16:42:53,908 INFO L231 Difference]: Finished difference. Result has 704 places, 663 transitions, 12363 flow [2024-06-27 16:42:53,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12264, PETRI_DIFFERENCE_MINUEND_PLACES=681, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=12363, PETRI_PLACES=704, PETRI_TRANSITIONS=663} [2024-06-27 16:42:53,912 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 682 predicate places. [2024-06-27 16:42:53,912 INFO L495 AbstractCegarLoop]: Abstraction has has 704 places, 663 transitions, 12363 flow [2024-06-27 16:42:53,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.787878787878788) internal successors, (158), 33 states have internal predecessors, (158), 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 16:42:53,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:42:53,913 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:42:53,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2024-06-27 16:42:54,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:54,127 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:42:54,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:42:54,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1395132700, now seen corresponding path program 156 times [2024-06-27 16:42:54,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:42:54,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428564383] [2024-06-27 16:42:54,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:42:54,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:42:54,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:42:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:42:54,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:42:54,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428564383] [2024-06-27 16:42:54,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428564383] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:42:54,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300443321] [2024-06-27 16:42:54,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:42:54,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:42:54,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:42:54,735 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:42:54,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2024-06-27 16:42:55,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 16:42:55,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:42:55,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 43 conjunts are in the unsatisfiable core [2024-06-27 16:42:55,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:42:55,479 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:42:55,479 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 46 treesize of output 30 [2024-06-27 16:42:55,543 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:42:55,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:42:55,663 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:42:55,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-06-27 16:42:55,776 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:42:55,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300443321] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:42:55,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:42:55,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 30 [2024-06-27 16:42:55,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405045511] [2024-06-27 16:42:55,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:42:55,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:42:55,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:42:55,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:42:55,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:42:55,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:42:55,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 704 places, 663 transitions, 12363 flow. Second operand has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 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 16:42:55,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:42:55,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:42:55,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:42:58,302 INFO L124 PetriNetUnfolderBase]: 2367/4371 cut-off events. [2024-06-27 16:42:58,302 INFO L125 PetriNetUnfolderBase]: For 904156/904156 co-relation queries the response was YES. [2024-06-27 16:42:58,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74394 conditions, 4371 events. 2367/4371 cut-off events. For 904156/904156 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 30259 event pairs, 1009 based on Foata normal form. 4/4371 useless extension candidates. Maximal degree in co-relation 74165. Up to 4084 conditions per place. [2024-06-27 16:42:58,398 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 621 selfloop transitions, 74 changer transitions 7/703 dead transitions. [2024-06-27 16:42:58,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 724 places, 703 transitions, 14604 flow [2024-06-27 16:42:58,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 16:42:58,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 16:42:58,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 185 transitions. [2024-06-27 16:42:58,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3114478114478115 [2024-06-27 16:42:58,399 INFO L175 Difference]: Start difference. First operand has 704 places, 663 transitions, 12363 flow. Second operand 27 states and 185 transitions. [2024-06-27 16:42:58,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 724 places, 703 transitions, 14604 flow [2024-06-27 16:43:02,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 703 places, 703 transitions, 14446 flow, removed 12 selfloop flow, removed 21 redundant places. [2024-06-27 16:43:02,780 INFO L231 Difference]: Finished difference. Result has 703 places, 659 transitions, 12328 flow [2024-06-27 16:43:02,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12193, PETRI_DIFFERENCE_MINUEND_PLACES=677, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=12328, PETRI_PLACES=703, PETRI_TRANSITIONS=659} [2024-06-27 16:43:02,780 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 681 predicate places. [2024-06-27 16:43:02,780 INFO L495 AbstractCegarLoop]: Abstraction has has 703 places, 659 transitions, 12328 flow [2024-06-27 16:43:02,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 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 16:43:02,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:43:02,781 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:43:02,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2024-06-27 16:43:02,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:43:02,989 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:43:02,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:43:02,990 INFO L85 PathProgramCache]: Analyzing trace with hash -312757062, now seen corresponding path program 157 times [2024-06-27 16:43:02,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:43:02,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143360404] [2024-06-27 16:43:02,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:43:02,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:43:03,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:43:03,577 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:43:03,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:43:03,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143360404] [2024-06-27 16:43:03,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143360404] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:43:03,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35365726] [2024-06-27 16:43:03,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:43:03,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:43:03,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:43:03,579 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:43:03,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2024-06-27 16:43:04,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:43:04,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 16:43:04,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:43:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:43:04,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:43:04,433 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:43:04,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-06-27 16:43:04,504 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:43:04,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35365726] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:43:04,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:43:04,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2024-06-27 16:43:04,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070646065] [2024-06-27 16:43:04,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:43:04,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:43:04,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:43:04,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:43:04,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:43:04,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:43:04,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 703 places, 659 transitions, 12328 flow. Second operand has 30 states, 30 states have (on average 4.633333333333334) internal successors, (139), 30 states have internal predecessors, (139), 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 16:43:04,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:43:04,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:43:04,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:43:06,702 INFO L124 PetriNetUnfolderBase]: 2353/4345 cut-off events. [2024-06-27 16:43:06,702 INFO L125 PetriNetUnfolderBase]: For 895720/895720 co-relation queries the response was YES. [2024-06-27 16:43:06,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74030 conditions, 4345 events. 2353/4345 cut-off events. For 895720/895720 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 29940 event pairs, 1029 based on Foata normal form. 4/4345 useless extension candidates. Maximal degree in co-relation 73803. Up to 4133 conditions per place. [2024-06-27 16:43:06,806 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 602 selfloop transitions, 61 changer transitions 11/675 dead transitions. [2024-06-27 16:43:06,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 721 places, 675 transitions, 13795 flow [2024-06-27 16:43:06,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 16:43:06,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 16:43:06,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 134 transitions. [2024-06-27 16:43:06,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29004329004329005 [2024-06-27 16:43:06,807 INFO L175 Difference]: Start difference. First operand has 703 places, 659 transitions, 12328 flow. Second operand 21 states and 134 transitions. [2024-06-27 16:43:06,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 721 places, 675 transitions, 13795 flow [2024-06-27 16:43:11,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 693 places, 675 transitions, 13593 flow, removed 16 selfloop flow, removed 28 redundant places. [2024-06-27 16:43:11,492 INFO L231 Difference]: Finished difference. Result has 693 places, 653 transitions, 12169 flow [2024-06-27 16:43:11,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12103, PETRI_DIFFERENCE_MINUEND_PLACES=673, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=12169, PETRI_PLACES=693, PETRI_TRANSITIONS=653} [2024-06-27 16:43:11,493 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 671 predicate places. [2024-06-27 16:43:11,493 INFO L495 AbstractCegarLoop]: Abstraction has has 693 places, 653 transitions, 12169 flow [2024-06-27 16:43:11,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.633333333333334) internal successors, (139), 30 states have internal predecessors, (139), 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 16:43:11,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:43:11,494 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:43:11,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2024-06-27 16:43:11,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:43:11,703 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:43:11,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:43:11,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1780254650, now seen corresponding path program 158 times [2024-06-27 16:43:11,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:43:11,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407174331] [2024-06-27 16:43:11,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:43:11,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:43:11,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:43:12,274 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:43:12,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:43:12,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407174331] [2024-06-27 16:43:12,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407174331] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:43:12,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850697547] [2024-06-27 16:43:12,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:43:12,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:43:12,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:43:12,276 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:43:12,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2024-06-27 16:43:12,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:43:12,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:43:12,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 41 conjunts are in the unsatisfiable core [2024-06-27 16:43:12,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:43:13,014 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:43:13,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:43:13,141 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:43:13,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-06-27 16:43:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:43:13,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850697547] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:43:13,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:43:13,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 29 [2024-06-27 16:43:13,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469619939] [2024-06-27 16:43:13,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:43:13,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:43:13,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:43:13,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:43:13,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:43:13,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:43:13,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 693 places, 653 transitions, 12169 flow. Second operand has 29 states, 29 states have (on average 4.758620689655173) internal successors, (138), 29 states have internal predecessors, (138), 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 16:43:13,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:43:13,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:43:13,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:43:15,174 INFO L124 PetriNetUnfolderBase]: 2343/4311 cut-off events. [2024-06-27 16:43:15,175 INFO L125 PetriNetUnfolderBase]: For 889946/889946 co-relation queries the response was YES. [2024-06-27 16:43:15,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73467 conditions, 4311 events. 2343/4311 cut-off events. For 889946/889946 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 29666 event pairs, 900 based on Foata normal form. 2/4311 useless extension candidates. Maximal degree in co-relation 73242. Up to 3852 conditions per place. [2024-06-27 16:43:15,272 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 563 selfloop transitions, 93 changer transitions 9/666 dead transitions. [2024-06-27 16:43:15,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 703 places, 666 transitions, 13691 flow [2024-06-27 16:43:15,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 16:43:15,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 16:43:15,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 104 transitions. [2024-06-27 16:43:15,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29545454545454547 [2024-06-27 16:43:15,274 INFO L175 Difference]: Start difference. First operand has 693 places, 653 transitions, 12169 flow. Second operand 16 states and 104 transitions. [2024-06-27 16:43:15,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 703 places, 666 transitions, 13691 flow [2024-06-27 16:43:20,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 683 places, 666 transitions, 13490 flow, removed 20 selfloop flow, removed 20 redundant places. [2024-06-27 16:43:20,193 INFO L231 Difference]: Finished difference. Result has 683 places, 649 transitions, 12095 flow [2024-06-27 16:43:20,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11957, PETRI_DIFFERENCE_MINUEND_PLACES=668, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=12095, PETRI_PLACES=683, PETRI_TRANSITIONS=649} [2024-06-27 16:43:20,194 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 661 predicate places. [2024-06-27 16:43:20,194 INFO L495 AbstractCegarLoop]: Abstraction has has 683 places, 649 transitions, 12095 flow [2024-06-27 16:43:20,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.758620689655173) internal successors, (138), 29 states have internal predecessors, (138), 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 16:43:20,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:43:20,194 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:43:20,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2024-06-27 16:43:20,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2024-06-27 16:43:20,397 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:43:20,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:43:20,398 INFO L85 PathProgramCache]: Analyzing trace with hash 2052478530, now seen corresponding path program 159 times [2024-06-27 16:43:20,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:43:20,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420936040] [2024-06-27 16:43:20,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:43:20,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:43:20,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:43:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:43:20,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:43:20,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420936040] [2024-06-27 16:43:20,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420936040] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:43:20,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890003731] [2024-06-27 16:43:20,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:43:20,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:43:20,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:43:20,926 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:43:20,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2024-06-27 16:43:21,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-06-27 16:43:21,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:43:21,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 43 conjunts are in the unsatisfiable core [2024-06-27 16:43:21,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:43:21,692 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:43:21,693 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 46 treesize of output 30 [2024-06-27 16:43:21,749 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:43:21,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:43:21,897 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:43:21,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-06-27 16:43:21,972 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:43:21,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890003731] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:43:21,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:43:21,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 30 [2024-06-27 16:43:21,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725656883] [2024-06-27 16:43:21,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:43:21,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:43:21,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:43:21,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:43:21,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:43:21,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:43:21,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 683 places, 649 transitions, 12095 flow. Second operand has 30 states, 30 states have (on average 4.7) internal successors, (141), 30 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:43:21,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:43:21,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:43:21,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:43:24,480 INFO L124 PetriNetUnfolderBase]: 2314/4230 cut-off events. [2024-06-27 16:43:24,480 INFO L125 PetriNetUnfolderBase]: For 872748/872748 co-relation queries the response was YES. [2024-06-27 16:43:24,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72043 conditions, 4230 events. 2314/4230 cut-off events. For 872748/872748 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 28716 event pairs, 919 based on Foata normal form. 14/4240 useless extension candidates. Maximal degree in co-relation 71819. Up to 3779 conditions per place. [2024-06-27 16:43:24,581 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 599 selfloop transitions, 84 changer transitions 7/691 dead transitions. [2024-06-27 16:43:24,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 700 places, 691 transitions, 14522 flow [2024-06-27 16:43:24,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 16:43:24,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-27 16:43:24,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 186 transitions. [2024-06-27 16:43:24,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32517482517482516 [2024-06-27 16:43:24,592 INFO L175 Difference]: Start difference. First operand has 683 places, 649 transitions, 12095 flow. Second operand 26 states and 186 transitions. [2024-06-27 16:43:24,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 700 places, 691 transitions, 14522 flow [2024-06-27 16:43:28,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 680 places, 691 transitions, 14273 flow, removed 22 selfloop flow, removed 20 redundant places. [2024-06-27 16:43:28,819 INFO L231 Difference]: Finished difference. Result has 680 places, 638 transitions, 11776 flow [2024-06-27 16:43:28,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11625, PETRI_DIFFERENCE_MINUEND_PLACES=655, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=11776, PETRI_PLACES=680, PETRI_TRANSITIONS=638} [2024-06-27 16:43:28,820 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 658 predicate places. [2024-06-27 16:43:28,820 INFO L495 AbstractCegarLoop]: Abstraction has has 680 places, 638 transitions, 11776 flow [2024-06-27 16:43:28,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.7) internal successors, (141), 30 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:43:28,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:43:28,821 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:43:28,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2024-06-27 16:43:29,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:43:29,034 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:43:29,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:43:29,034 INFO L85 PathProgramCache]: Analyzing trace with hash -746280198, now seen corresponding path program 160 times [2024-06-27 16:43:29,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:43:29,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429481444] [2024-06-27 16:43:29,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:43:29,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:43:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:43:29,543 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:43:29,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:43:29,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429481444] [2024-06-27 16:43:29,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429481444] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:43:29,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265253381] [2024-06-27 16:43:29,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:43:29,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:43:29,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:43:29,544 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:43:29,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2024-06-27 16:43:30,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:43:30,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:43:30,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 16:43:30,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:43:30,276 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:43:30,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:43:30,401 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:43:30,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-06-27 16:43:30,463 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:43:30,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265253381] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:43:30,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:43:30,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2024-06-27 16:43:30,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640307969] [2024-06-27 16:43:30,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:43:30,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:43:30,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:43:30,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:43:30,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:43:30,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:43:30,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 680 places, 638 transitions, 11776 flow. Second operand has 30 states, 30 states have (on average 4.766666666666667) internal successors, (143), 30 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 16:43:30,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:43:30,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:43:30,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:43:32,731 INFO L124 PetriNetUnfolderBase]: 2304/4210 cut-off events. [2024-06-27 16:43:32,731 INFO L125 PetriNetUnfolderBase]: For 862555/862555 co-relation queries the response was YES. [2024-06-27 16:43:32,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71779 conditions, 4210 events. 2304/4210 cut-off events. For 862555/862555 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 28473 event pairs, 940 based on Foata normal form. 23/4229 useless extension candidates. Maximal degree in co-relation 71561. Up to 3845 conditions per place. [2024-06-27 16:43:32,825 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 597 selfloop transitions, 81 changer transitions 6/685 dead transitions. [2024-06-27 16:43:32,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 700 places, 685 transitions, 14325 flow [2024-06-27 16:43:32,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 16:43:32,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 16:43:32,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 180 transitions. [2024-06-27 16:43:32,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32727272727272727 [2024-06-27 16:43:32,827 INFO L175 Difference]: Start difference. First operand has 680 places, 638 transitions, 11776 flow. Second operand 25 states and 180 transitions. [2024-06-27 16:43:32,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 700 places, 685 transitions, 14325 flow [2024-06-27 16:43:38,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 677 places, 685 transitions, 14153 flow, removed 4 selfloop flow, removed 23 redundant places. [2024-06-27 16:43:38,112 INFO L231 Difference]: Finished difference. Result has 679 places, 635 transitions, 11744 flow [2024-06-27 16:43:38,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11550, PETRI_DIFFERENCE_MINUEND_PLACES=653, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=11744, PETRI_PLACES=679, PETRI_TRANSITIONS=635} [2024-06-27 16:43:38,118 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 657 predicate places. [2024-06-27 16:43:38,118 INFO L495 AbstractCegarLoop]: Abstraction has has 679 places, 635 transitions, 11744 flow [2024-06-27 16:43:38,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.766666666666667) internal successors, (143), 30 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 16:43:38,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:43:38,119 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:43:38,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2024-06-27 16:43:38,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2024-06-27 16:43:38,332 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:43:38,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:43:38,332 INFO L85 PathProgramCache]: Analyzing trace with hash 267379504, now seen corresponding path program 161 times [2024-06-27 16:43:38,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:43:38,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412166167] [2024-06-27 16:43:38,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:43:38,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:43:38,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:43:38,866 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:43:38,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:43:38,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412166167] [2024-06-27 16:43:38,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412166167] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:43:38,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163992920] [2024-06-27 16:43:38,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:43:38,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:43:38,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:43:38,868 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:43:38,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2024-06-27 16:43:39,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:43:39,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:43:39,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 40 conjunts are in the unsatisfiable core [2024-06-27 16:43:39,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:43:39,709 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:43:39,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:43:39,881 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:43:39,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-06-27 16:43:39,936 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:43:39,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163992920] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:43:39,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:43:39,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 10] total 36 [2024-06-27 16:43:39,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245418851] [2024-06-27 16:43:39,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:43:39,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-06-27 16:43:39,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:43:39,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-06-27 16:43:39,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2024-06-27 16:43:39,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:43:39,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 679 places, 635 transitions, 11744 flow. Second operand has 36 states, 36 states have (on average 4.75) internal successors, (171), 36 states have internal predecessors, (171), 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 16:43:39,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:43:39,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:43:39,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:43:42,537 INFO L124 PetriNetUnfolderBase]: 2351/4280 cut-off events. [2024-06-27 16:43:42,538 INFO L125 PetriNetUnfolderBase]: For 889696/889696 co-relation queries the response was YES. [2024-06-27 16:43:42,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73726 conditions, 4280 events. 2351/4280 cut-off events. For 889696/889696 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 28939 event pairs, 960 based on Foata normal form. 18/4294 useless extension candidates. Maximal degree in co-relation 73507. Up to 3943 conditions per place. [2024-06-27 16:43:42,645 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 619 selfloop transitions, 83 changer transitions 1/704 dead transitions. [2024-06-27 16:43:42,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 703 places, 704 transitions, 15100 flow [2024-06-27 16:43:42,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-06-27 16:43:42,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-06-27 16:43:42,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 210 transitions. [2024-06-27 16:43:42,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-06-27 16:43:42,646 INFO L175 Difference]: Start difference. First operand has 679 places, 635 transitions, 11744 flow. Second operand 30 states and 210 transitions. [2024-06-27 16:43:42,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 703 places, 704 transitions, 15100 flow [2024-06-27 16:43:47,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 679 places, 704 transitions, 14891 flow, removed 25 selfloop flow, removed 24 redundant places. [2024-06-27 16:43:48,006 INFO L231 Difference]: Finished difference. Result has 684 places, 649 transitions, 12286 flow [2024-06-27 16:43:48,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11554, PETRI_DIFFERENCE_MINUEND_PLACES=650, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=12286, PETRI_PLACES=684, PETRI_TRANSITIONS=649} [2024-06-27 16:43:48,006 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 662 predicate places. [2024-06-27 16:43:48,007 INFO L495 AbstractCegarLoop]: Abstraction has has 684 places, 649 transitions, 12286 flow [2024-06-27 16:43:48,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.75) internal successors, (171), 36 states have internal predecessors, (171), 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 16:43:48,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:43:48,007 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:43:48,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2024-06-27 16:43:48,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2024-06-27 16:43:48,221 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:43:48,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:43:48,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1873676291, now seen corresponding path program 162 times [2024-06-27 16:43:48,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:43:48,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741457139] [2024-06-27 16:43:48,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:43:48,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:43:48,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:43:48,741 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:43:48,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:43:48,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741457139] [2024-06-27 16:43:48,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741457139] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:43:48,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99358792] [2024-06-27 16:43:48,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:43:48,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:43:48,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:43:48,743 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:43:48,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2024-06-27 16:43:49,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 16:43:49,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:43:49,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:43:49,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:43:49,456 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:43:49,457 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 65 treesize of output 41 [2024-06-27 16:43:49,499 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:43:49,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:43:49,617 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:43:49,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-06-27 16:43:49,695 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:43:49,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99358792] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:43:49,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:43:49,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 29 [2024-06-27 16:43:49,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769128657] [2024-06-27 16:43:49,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:43:49,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:43:49,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:43:49,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:43:49,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:43:49,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:43:49,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 684 places, 649 transitions, 12286 flow. Second operand has 29 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 states have internal predecessors, (139), 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 16:43:49,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:43:49,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:43:49,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:43:51,816 INFO L124 PetriNetUnfolderBase]: 2332/4237 cut-off events. [2024-06-27 16:43:51,817 INFO L125 PetriNetUnfolderBase]: For 888682/888682 co-relation queries the response was YES. [2024-06-27 16:43:51,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73369 conditions, 4237 events. 2332/4237 cut-off events. For 888682/888682 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 28533 event pairs, 944 based on Foata normal form. 6/4239 useless extension candidates. Maximal degree in co-relation 73149. Up to 3895 conditions per place. [2024-06-27 16:43:51,926 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 592 selfloop transitions, 80 changer transitions 6/679 dead transitions. [2024-06-27 16:43:51,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 702 places, 679 transitions, 14529 flow [2024-06-27 16:43:51,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 16:43:51,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 16:43:51,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 153 transitions. [2024-06-27 16:43:51,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30237154150197626 [2024-06-27 16:43:51,927 INFO L175 Difference]: Start difference. First operand has 684 places, 649 transitions, 12286 flow. Second operand 23 states and 153 transitions. [2024-06-27 16:43:51,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 702 places, 679 transitions, 14529 flow [2024-06-27 16:43:56,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 680 places, 679 transitions, 14068 flow, removed 161 selfloop flow, removed 22 redundant places. [2024-06-27 16:43:56,943 INFO L231 Difference]: Finished difference. Result has 680 places, 645 transitions, 11954 flow [2024-06-27 16:43:56,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11814, PETRI_DIFFERENCE_MINUEND_PLACES=658, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=11954, PETRI_PLACES=680, PETRI_TRANSITIONS=645} [2024-06-27 16:43:56,943 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 658 predicate places. [2024-06-27 16:43:56,943 INFO L495 AbstractCegarLoop]: Abstraction has has 680 places, 645 transitions, 11954 flow [2024-06-27 16:43:56,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 states have internal predecessors, (139), 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 16:43:56,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:43:56,944 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:43:56,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2024-06-27 16:43:57,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:43:57,157 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:43:57,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:43:57,157 INFO L85 PathProgramCache]: Analyzing trace with hash -350672067, now seen corresponding path program 163 times [2024-06-27 16:43:57,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:43:57,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009721961] [2024-06-27 16:43:57,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:43:57,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:43:57,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:43:57,752 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:43:57,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:43:57,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009721961] [2024-06-27 16:43:57,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009721961] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:43:57,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353674529] [2024-06-27 16:43:57,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:43:57,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:43:57,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:43:57,755 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:43:57,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2024-06-27 16:43:58,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:43:58,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 16:43:58,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:43:58,484 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:43:58,484 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 81 treesize of output 45 [2024-06-27 16:43:58,529 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:43:58,529 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:43:58,671 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:43:58,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-06-27 16:43:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:43:58,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353674529] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:43:58,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:43:58,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2024-06-27 16:43:58,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346548935] [2024-06-27 16:43:58,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:43:58,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:43:58,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:43:58,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:43:58,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:43:58,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:43:58,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 680 places, 645 transitions, 11954 flow. Second operand has 30 states, 30 states have (on average 4.7) internal successors, (141), 30 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:43:58,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:43:58,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:43:58,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:01,113 INFO L124 PetriNetUnfolderBase]: 2303/4163 cut-off events. [2024-06-27 16:44:01,113 INFO L125 PetriNetUnfolderBase]: For 859389/859389 co-relation queries the response was YES. [2024-06-27 16:44:01,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71668 conditions, 4163 events. 2303/4163 cut-off events. For 859389/859389 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 27694 event pairs, 968 based on Foata normal form. 9/4168 useless extension candidates. Maximal degree in co-relation 71449. Up to 3947 conditions per place. [2024-06-27 16:44:01,211 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 586 selfloop transitions, 69 changer transitions 7/663 dead transitions. [2024-06-27 16:44:01,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 697 places, 663 transitions, 13755 flow [2024-06-27 16:44:01,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-06-27 16:44:01,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-06-27 16:44:01,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 152 transitions. [2024-06-27 16:44:01,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2878787878787879 [2024-06-27 16:44:01,212 INFO L175 Difference]: Start difference. First operand has 680 places, 645 transitions, 11954 flow. Second operand 24 states and 152 transitions. [2024-06-27 16:44:01,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 697 places, 663 transitions, 13755 flow [2024-06-27 16:44:05,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 673 places, 663 transitions, 13560 flow, removed 11 selfloop flow, removed 24 redundant places. [2024-06-27 16:44:05,462 INFO L231 Difference]: Finished difference. Result has 673 places, 636 transitions, 11806 flow [2024-06-27 16:44:05,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11693, PETRI_DIFFERENCE_MINUEND_PLACES=650, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=11806, PETRI_PLACES=673, PETRI_TRANSITIONS=636} [2024-06-27 16:44:05,463 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 651 predicate places. [2024-06-27 16:44:05,463 INFO L495 AbstractCegarLoop]: Abstraction has has 673 places, 636 transitions, 11806 flow [2024-06-27 16:44:05,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.7) internal successors, (141), 30 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:05,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:05,463 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:05,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2024-06-27 16:44:05,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2024-06-27 16:44:05,677 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:05,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:05,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1379392953, now seen corresponding path program 164 times [2024-06-27 16:44:05,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:05,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596022165] [2024-06-27 16:44:05,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:05,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:06,252 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:44:06,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:06,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596022165] [2024-06-27 16:44:06,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596022165] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:44:06,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429686824] [2024-06-27 16:44:06,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:44:06,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:06,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:44:06,255 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:44:06,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2024-06-27 16:44:06,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:44:06,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:44:06,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 41 conjunts are in the unsatisfiable core [2024-06-27 16:44:06,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:44:06,992 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:44:06,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:44:07,106 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:44:07,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-06-27 16:44:07,211 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:44:07,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429686824] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:44:07,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:44:07,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 30 [2024-06-27 16:44:07,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221391710] [2024-06-27 16:44:07,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:44:07,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:44:07,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:07,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:44:07,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:44:07,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:44:07,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 673 places, 636 transitions, 11806 flow. Second operand has 30 states, 30 states have (on average 4.766666666666667) internal successors, (143), 30 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 16:44:07,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:07,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:44:07,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:09,382 INFO L124 PetriNetUnfolderBase]: 2286/4119 cut-off events. [2024-06-27 16:44:09,383 INFO L125 PetriNetUnfolderBase]: For 845841/845841 co-relation queries the response was YES. [2024-06-27 16:44:09,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70845 conditions, 4119 events. 2286/4119 cut-off events. For 845841/845841 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 27291 event pairs, 834 based on Foata normal form. 6/4121 useless extension candidates. Maximal degree in co-relation 70627. Up to 3648 conditions per place. [2024-06-27 16:44:09,487 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 538 selfloop transitions, 110 changer transitions 12/661 dead transitions. [2024-06-27 16:44:09,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 691 places, 661 transitions, 13498 flow [2024-06-27 16:44:09,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 16:44:09,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 16:44:09,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 141 transitions. [2024-06-27 16:44:09,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29132231404958675 [2024-06-27 16:44:09,488 INFO L175 Difference]: Start difference. First operand has 673 places, 636 transitions, 11806 flow. Second operand 22 states and 141 transitions. [2024-06-27 16:44:09,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 691 places, 661 transitions, 13498 flow [2024-06-27 16:44:13,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 669 places, 661 transitions, 13346 flow, removed 4 selfloop flow, removed 22 redundant places. [2024-06-27 16:44:13,869 INFO L231 Difference]: Finished difference. Result has 671 places, 635 transitions, 11858 flow [2024-06-27 16:44:13,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11654, PETRI_DIFFERENCE_MINUEND_PLACES=648, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=11858, PETRI_PLACES=671, PETRI_TRANSITIONS=635} [2024-06-27 16:44:13,870 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 649 predicate places. [2024-06-27 16:44:13,870 INFO L495 AbstractCegarLoop]: Abstraction has has 671 places, 635 transitions, 11858 flow [2024-06-27 16:44:13,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.766666666666667) internal successors, (143), 30 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 16:44:13,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:13,870 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:13,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2024-06-27 16:44:14,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:14,084 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:14,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:14,085 INFO L85 PathProgramCache]: Analyzing trace with hash 425202485, now seen corresponding path program 165 times [2024-06-27 16:44:14,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:14,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135022708] [2024-06-27 16:44:14,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:14,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:14,644 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:44:14,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:14,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135022708] [2024-06-27 16:44:14,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135022708] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:44:14,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811693840] [2024-06-27 16:44:14,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:44:14,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:14,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:44:14,646 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:44:14,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2024-06-27 16:44:15,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:44:15,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:44:15,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 41 conjunts are in the unsatisfiable core [2024-06-27 16:44:15,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:44:15,420 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:44:15,421 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 65 treesize of output 41 [2024-06-27 16:44:15,462 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-06-27 16:44:15,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:44:15,585 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-06-27 16:44:15,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-06-27 16:44:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:44:15,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811693840] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:44:15,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:44:15,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 30 [2024-06-27 16:44:15,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980738807] [2024-06-27 16:44:15,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:44:15,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:44:15,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:15,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:44:15,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:44:15,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:44:15,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 671 places, 635 transitions, 11858 flow. Second operand has 30 states, 30 states have (on average 4.766666666666667) internal successors, (143), 30 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 16:44:15,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:15,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:44:15,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:17,804 INFO L124 PetriNetUnfolderBase]: 2262/4059 cut-off events. [2024-06-27 16:44:17,804 INFO L125 PetriNetUnfolderBase]: For 842665/842665 co-relation queries the response was YES. [2024-06-27 16:44:17,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70358 conditions, 4059 events. 2262/4059 cut-off events. For 842665/842665 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 26685 event pairs, 813 based on Foata normal form. 8/4063 useless extension candidates. Maximal degree in co-relation 70139. Up to 3585 conditions per place. [2024-06-27 16:44:17,901 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 537 selfloop transitions, 119 changer transitions 0/657 dead transitions. [2024-06-27 16:44:17,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 689 places, 657 transitions, 13765 flow [2024-06-27 16:44:17,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-06-27 16:44:17,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-06-27 16:44:17,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 155 transitions. [2024-06-27 16:44:17,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2935606060606061 [2024-06-27 16:44:17,902 INFO L175 Difference]: Start difference. First operand has 671 places, 635 transitions, 11858 flow. Second operand 24 states and 155 transitions. [2024-06-27 16:44:17,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 689 places, 657 transitions, 13765 flow [2024-06-27 16:44:21,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 661 places, 657 transitions, 13420 flow, removed 21 selfloop flow, removed 28 redundant places. [2024-06-27 16:44:21,808 INFO L231 Difference]: Finished difference. Result has 661 places, 633 transitions, 11726 flow [2024-06-27 16:44:21,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11488, PETRI_DIFFERENCE_MINUEND_PLACES=638, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=11726, PETRI_PLACES=661, PETRI_TRANSITIONS=633} [2024-06-27 16:44:21,809 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 639 predicate places. [2024-06-27 16:44:21,809 INFO L495 AbstractCegarLoop]: Abstraction has has 661 places, 633 transitions, 11726 flow [2024-06-27 16:44:21,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.766666666666667) internal successors, (143), 30 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 16:44:21,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:21,809 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:21,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2024-06-27 16:44:22,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:22,028 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:22,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:22,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1628914366, now seen corresponding path program 166 times [2024-06-27 16:44:22,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:22,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497108127] [2024-06-27 16:44:22,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:22,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:22,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:44:22,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:22,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497108127] [2024-06-27 16:44:22,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497108127] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:44:22,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056340629] [2024-06-27 16:44:22,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:44:22,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:22,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:44:22,635 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:44:22,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2024-06-27 16:44:23,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:44:23,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:44:23,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:44:23,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:44:23,393 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:44:23,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:44:23,520 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:44:23,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-06-27 16:44:23,592 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:44:23,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056340629] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:44:23,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:44:23,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2024-06-27 16:44:23,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762830561] [2024-06-27 16:44:23,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:44:23,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:44:23,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:23,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:44:23,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:44:23,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:44:23,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 661 places, 633 transitions, 11726 flow. Second operand has 30 states, 30 states have (on average 4.633333333333334) internal successors, (139), 30 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:23,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:23,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:44:23,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:25,483 INFO L124 PetriNetUnfolderBase]: 2256/4045 cut-off events. [2024-06-27 16:44:25,483 INFO L125 PetriNetUnfolderBase]: For 826968/826968 co-relation queries the response was YES. [2024-06-27 16:44:25,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69723 conditions, 4045 events. 2256/4045 cut-off events. For 826968/826968 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 26505 event pairs, 949 based on Foata normal form. 4/4045 useless extension candidates. Maximal degree in co-relation 69513. Up to 3865 conditions per place. [2024-06-27 16:44:25,579 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 581 selfloop transitions, 55 changer transitions 15/652 dead transitions. [2024-06-27 16:44:25,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 681 places, 652 transitions, 13207 flow [2024-06-27 16:44:25,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 16:44:25,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 16:44:25,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 130 transitions. [2024-06-27 16:44:25,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2813852813852814 [2024-06-27 16:44:25,580 INFO L175 Difference]: Start difference. First operand has 661 places, 633 transitions, 11726 flow. Second operand 21 states and 130 transitions. [2024-06-27 16:44:25,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 681 places, 652 transitions, 13207 flow [2024-06-27 16:44:30,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 658 places, 652 transitions, 12969 flow, removed 0 selfloop flow, removed 23 redundant places. [2024-06-27 16:44:30,480 INFO L231 Difference]: Finished difference. Result has 660 places, 628 transitions, 11532 flow [2024-06-27 16:44:30,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11478, PETRI_DIFFERENCE_MINUEND_PLACES=638, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=11532, PETRI_PLACES=660, PETRI_TRANSITIONS=628} [2024-06-27 16:44:30,481 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 638 predicate places. [2024-06-27 16:44:30,481 INFO L495 AbstractCegarLoop]: Abstraction has has 660 places, 628 transitions, 11532 flow [2024-06-27 16:44:30,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.633333333333334) internal successors, (139), 30 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:30,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:30,481 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:30,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2024-06-27 16:44:30,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:30,695 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:30,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:30,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1122427107, now seen corresponding path program 167 times [2024-06-27 16:44:30,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:30,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865896672] [2024-06-27 16:44:30,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:30,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:30,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:31,248 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:44:31,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:31,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865896672] [2024-06-27 16:44:31,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865896672] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:44:31,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160115365] [2024-06-27 16:44:31,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:44:31,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:31,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:44:31,250 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:44:31,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2024-06-27 16:44:31,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:44:31,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:44:31,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:44:31,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:44:32,143 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:44:32,143 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 73 treesize of output 45 [2024-06-27 16:44:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:44:32,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:44:32,320 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:44:32,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-06-27 16:44:32,388 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:44:32,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160115365] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:44:32,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:44:32,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 9] total 33 [2024-06-27 16:44:32,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714537343] [2024-06-27 16:44:32,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:44:32,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 16:44:32,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:32,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 16:44:32,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 16:44:32,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:44:32,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 660 places, 628 transitions, 11532 flow. Second operand has 33 states, 33 states have (on average 4.848484848484849) internal successors, (160), 33 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:32,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:32,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:44:32,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:34,814 INFO L124 PetriNetUnfolderBase]: 2234/3985 cut-off events. [2024-06-27 16:44:34,815 INFO L125 PetriNetUnfolderBase]: For 813351/813351 co-relation queries the response was YES. [2024-06-27 16:44:34,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68659 conditions, 3985 events. 2234/3985 cut-off events. For 813351/813351 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 25790 event pairs, 865 based on Foata normal form. 6/3989 useless extension candidates. Maximal degree in co-relation 68447. Up to 3611 conditions per place. [2024-06-27 16:44:34,897 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 566 selfloop transitions, 87 changer transitions 8/662 dead transitions. [2024-06-27 16:44:34,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 673 places, 662 transitions, 13889 flow [2024-06-27 16:44:34,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 16:44:34,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 16:44:34,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 164 transitions. [2024-06-27 16:44:34,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29818181818181816 [2024-06-27 16:44:34,898 INFO L175 Difference]: Start difference. First operand has 660 places, 628 transitions, 11532 flow. Second operand 25 states and 164 transitions. [2024-06-27 16:44:34,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 673 places, 662 transitions, 13889 flow [2024-06-27 16:44:38,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 652 places, 662 transitions, 13601 flow, removed 7 selfloop flow, removed 21 redundant places. [2024-06-27 16:44:38,592 INFO L231 Difference]: Finished difference. Result has 652 places, 624 transitions, 11373 flow [2024-06-27 16:44:38,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11223, PETRI_DIFFERENCE_MINUEND_PLACES=628, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=11373, PETRI_PLACES=652, PETRI_TRANSITIONS=624} [2024-06-27 16:44:38,593 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 630 predicate places. [2024-06-27 16:44:38,593 INFO L495 AbstractCegarLoop]: Abstraction has has 652 places, 624 transitions, 11373 flow [2024-06-27 16:44:38,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.848484848484849) internal successors, (160), 33 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:38,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:38,594 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:38,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2024-06-27 16:44:38,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2024-06-27 16:44:38,808 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:38,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:38,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1567002037, now seen corresponding path program 168 times [2024-06-27 16:44:38,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:38,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970780469] [2024-06-27 16:44:38,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:38,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:38,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:44:39,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:39,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970780469] [2024-06-27 16:44:39,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970780469] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:44:39,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680883425] [2024-06-27 16:44:39,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:44:39,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:39,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:44:39,393 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:44:39,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2024-06-27 16:44:40,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 16:44:40,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:44:40,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:44:40,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:44:40,138 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:44:40,139 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 65 treesize of output 41 [2024-06-27 16:44:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:44:40,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:44:40,304 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-06-27 16:44:40,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-06-27 16:44:40,354 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:44:40,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680883425] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:44:40,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:44:40,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 29 [2024-06-27 16:44:40,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106457729] [2024-06-27 16:44:40,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:44:40,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 16:44:40,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:40,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 16:44:40,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:44:40,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:44:40,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 652 places, 624 transitions, 11373 flow. Second operand has 29 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:40,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:40,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:44:40,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:42,162 INFO L124 PetriNetUnfolderBase]: 2221/3953 cut-off events. [2024-06-27 16:44:42,162 INFO L125 PetriNetUnfolderBase]: For 805926/805926 co-relation queries the response was YES. [2024-06-27 16:44:42,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68134 conditions, 3953 events. 2221/3953 cut-off events. For 805926/805926 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 25541 event pairs, 768 based on Foata normal form. 3/3954 useless extension candidates. Maximal degree in co-relation 67926. Up to 3437 conditions per place. [2024-06-27 16:44:42,249 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 531 selfloop transitions, 109 changer transitions 3/644 dead transitions. [2024-06-27 16:44:42,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 644 transitions, 13273 flow [2024-06-27 16:44:42,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 16:44:42,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 16:44:42,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 125 transitions. [2024-06-27 16:44:42,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29904306220095694 [2024-06-27 16:44:42,250 INFO L175 Difference]: Start difference. First operand has 652 places, 624 transitions, 11373 flow. Second operand 19 states and 125 transitions. [2024-06-27 16:44:42,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 644 transitions, 13273 flow [2024-06-27 16:44:46,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 643 places, 644 transitions, 13097 flow, removed 1 selfloop flow, removed 22 redundant places. [2024-06-27 16:44:46,839 INFO L231 Difference]: Finished difference. Result has 643 places, 622 transitions, 11401 flow [2024-06-27 16:44:46,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11190, PETRI_DIFFERENCE_MINUEND_PLACES=625, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=11401, PETRI_PLACES=643, PETRI_TRANSITIONS=622} [2024-06-27 16:44:46,840 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 621 predicate places. [2024-06-27 16:44:46,840 INFO L495 AbstractCegarLoop]: Abstraction has has 643 places, 622 transitions, 11401 flow [2024-06-27 16:44:46,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.793103448275862) internal successors, (139), 29 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:46,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:46,840 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:46,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2024-06-27 16:44:47,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:47,054 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:47,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:47,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1446551222, now seen corresponding path program 169 times [2024-06-27 16:44:47,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:47,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033468848] [2024-06-27 16:44:47,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:47,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:47,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:47,702 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:44:47,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:47,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033468848] [2024-06-27 16:44:47,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033468848] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:44:47,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900292341] [2024-06-27 16:44:47,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:44:47,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:47,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:44:47,704 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:44:47,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2024-06-27 16:44:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:48,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 16:44:48,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:44:48,450 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:44:48,450 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 35 treesize of output 23 [2024-06-27 16:44:48,481 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:44:48,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:44:48,847 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-06-27 16:44:48,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 134 treesize of output 83 [2024-06-27 16:44:48,872 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:44:48,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900292341] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:44:48,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:44:48,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 12] total 37 [2024-06-27 16:44:48,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116481493] [2024-06-27 16:44:48,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:44:48,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-06-27 16:44:48,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:48,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-06-27 16:44:48,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1201, Unknown=0, NotChecked=0, Total=1332 [2024-06-27 16:44:48,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:44:48,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 643 places, 622 transitions, 11401 flow. Second operand has 37 states, 37 states have (on average 4.5675675675675675) internal successors, (169), 37 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 16:44:48,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:48,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:44:48,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:44:51,607 INFO L124 PetriNetUnfolderBase]: 2555/4537 cut-off events. [2024-06-27 16:44:51,607 INFO L125 PetriNetUnfolderBase]: For 917363/917363 co-relation queries the response was YES. [2024-06-27 16:44:51,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79060 conditions, 4537 events. 2555/4537 cut-off events. For 917363/917363 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 30160 event pairs, 230 based on Foata normal form. 1/4536 useless extension candidates. Maximal degree in co-relation 78852. Up to 2189 conditions per place. [2024-06-27 16:44:51,715 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 446 selfloop transitions, 285 changer transitions 3/735 dead transitions. [2024-06-27 16:44:51,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 663 places, 735 transitions, 15836 flow [2024-06-27 16:44:51,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 16:44:51,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 16:44:51,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 166 transitions. [2024-06-27 16:44:51,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32806324110671936 [2024-06-27 16:44:51,717 INFO L175 Difference]: Start difference. First operand has 643 places, 622 transitions, 11401 flow. Second operand 23 states and 166 transitions. [2024-06-27 16:44:51,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 663 places, 735 transitions, 15836 flow [2024-06-27 16:44:57,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 646 places, 735 transitions, 15570 flow, removed 6 selfloop flow, removed 17 redundant places. [2024-06-27 16:44:57,148 INFO L231 Difference]: Finished difference. Result has 652 places, 650 transitions, 12890 flow [2024-06-27 16:44:57,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11173, PETRI_DIFFERENCE_MINUEND_PLACES=624, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12890, PETRI_PLACES=652, PETRI_TRANSITIONS=650} [2024-06-27 16:44:57,148 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 630 predicate places. [2024-06-27 16:44:57,149 INFO L495 AbstractCegarLoop]: Abstraction has has 652 places, 650 transitions, 12890 flow [2024-06-27 16:44:57,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.5675675675675675) internal successors, (169), 37 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 16:44:57,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:44:57,149 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:44:57,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2024-06-27 16:44:57,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:57,363 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:44:57,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:44:57,364 INFO L85 PathProgramCache]: Analyzing trace with hash 398973384, now seen corresponding path program 170 times [2024-06-27 16:44:57,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:44:57,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021670241] [2024-06-27 16:44:57,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:44:57,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:44:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:44:58,001 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:44:58,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:44:58,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021670241] [2024-06-27 16:44:58,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021670241] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:44:58,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24450223] [2024-06-27 16:44:58,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:44:58,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:44:58,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:44:58,003 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:44:58,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2024-06-27 16:44:58,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:44:58,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:44:58,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 47 conjunts are in the unsatisfiable core [2024-06-27 16:44:58,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:44:58,842 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:44:58,842 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 27 treesize of output 19 [2024-06-27 16:44:58,876 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-06-27 16:44:58,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:44:59,221 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-06-27 16:44:59,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-06-27 16:44:59,328 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:44:59,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24450223] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:44:59,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:44:59,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 12] total 39 [2024-06-27 16:44:59,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845109779] [2024-06-27 16:44:59,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:44:59,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-06-27 16:44:59,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:44:59,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-06-27 16:44:59,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1342, Unknown=0, NotChecked=0, Total=1482 [2024-06-27 16:44:59,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:44:59,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 652 places, 650 transitions, 12890 flow. Second operand has 39 states, 39 states have (on average 4.589743589743589) internal successors, (179), 39 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:44:59,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:44:59,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:44:59,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:45:02,183 INFO L124 PetriNetUnfolderBase]: 2619/4659 cut-off events. [2024-06-27 16:45:02,183 INFO L125 PetriNetUnfolderBase]: For 997798/997798 co-relation queries the response was YES. [2024-06-27 16:45:02,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84195 conditions, 4659 events. 2619/4659 cut-off events. For 997798/997798 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 31263 event pairs, 239 based on Foata normal form. 3/4662 useless extension candidates. Maximal degree in co-relation 83981. Up to 3449 conditions per place. [2024-06-27 16:45:02,292 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 491 selfloop transitions, 233 changer transitions 4/729 dead transitions. [2024-06-27 16:45:02,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 681 places, 729 transitions, 16821 flow [2024-06-27 16:45:02,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-06-27 16:45:02,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-06-27 16:45:02,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 220 transitions. [2024-06-27 16:45:02,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-27 16:45:02,293 INFO L175 Difference]: Start difference. First operand has 652 places, 650 transitions, 12890 flow. Second operand 30 states and 220 transitions. [2024-06-27 16:45:02,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 681 places, 729 transitions, 16821 flow [2024-06-27 16:45:07,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 668 places, 729 transitions, 16191 flow, removed 177 selfloop flow, removed 13 redundant places. [2024-06-27 16:45:07,809 INFO L231 Difference]: Finished difference. Result has 674 places, 678 transitions, 14483 flow [2024-06-27 16:45:07,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12278, PETRI_DIFFERENCE_MINUEND_PLACES=639, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=14483, PETRI_PLACES=674, PETRI_TRANSITIONS=678} [2024-06-27 16:45:07,810 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 652 predicate places. [2024-06-27 16:45:07,810 INFO L495 AbstractCegarLoop]: Abstraction has has 674 places, 678 transitions, 14483 flow [2024-06-27 16:45:07,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.589743589743589) internal successors, (179), 39 states have internal predecessors, (179), 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 16:45:07,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:45:07,811 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:45:07,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2024-06-27 16:45:08,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2024-06-27 16:45:08,024 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:45:08,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:45:08,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1628287190, now seen corresponding path program 171 times [2024-06-27 16:45:08,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:45:08,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991863102] [2024-06-27 16:45:08,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:45:08,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:45:08,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:45:08,630 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:45:08,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:45:08,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991863102] [2024-06-27 16:45:08,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991863102] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:45:08,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162784971] [2024-06-27 16:45:08,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:45:08,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:45:08,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:45:08,631 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:45:08,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2024-06-27 16:45:09,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:45:09,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:45:09,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 41 conjunts are in the unsatisfiable core [2024-06-27 16:45:09,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:45:09,407 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:45:09,408 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 27 treesize of output 19 [2024-06-27 16:45:09,414 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:45:09,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:45:09,729 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-06-27 16:45:09,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-06-27 16:45:09,824 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:45:09,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162784971] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:45:09,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:45:09,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 12] total 33 [2024-06-27 16:45:09,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070309345] [2024-06-27 16:45:09,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:45:09,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 16:45:09,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:45:09,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 16:45:09,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 16:45:09,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:45:09,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 674 places, 678 transitions, 14483 flow. Second operand has 33 states, 33 states have (on average 4.666666666666667) internal successors, (154), 33 states have internal predecessors, (154), 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 16:45:09,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:45:09,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:45:09,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:45:12,406 INFO L124 PetriNetUnfolderBase]: 2637/4694 cut-off events. [2024-06-27 16:45:12,407 INFO L125 PetriNetUnfolderBase]: For 1016175/1016175 co-relation queries the response was YES. [2024-06-27 16:45:12,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85554 conditions, 4694 events. 2637/4694 cut-off events. For 1016175/1016175 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 31563 event pairs, 246 based on Foata normal form. 1/4695 useless extension candidates. Maximal degree in co-relation 85334. Up to 3572 conditions per place. [2024-06-27 16:45:12,524 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 504 selfloop transitions, 210 changer transitions 1/716 dead transitions. [2024-06-27 16:45:12,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 693 places, 716 transitions, 17009 flow [2024-06-27 16:45:12,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-27 16:45:12,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-27 16:45:12,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 145 transitions. [2024-06-27 16:45:12,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32954545454545453 [2024-06-27 16:45:12,525 INFO L175 Difference]: Start difference. First operand has 674 places, 678 transitions, 14483 flow. Second operand 20 states and 145 transitions. [2024-06-27 16:45:12,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 693 places, 716 transitions, 17009 flow [2024-06-27 16:45:18,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 673 places, 716 transitions, 15402 flow, removed 623 selfloop flow, removed 20 redundant places. [2024-06-27 16:45:18,582 INFO L231 Difference]: Finished difference. Result has 677 places, 688 transitions, 13973 flow [2024-06-27 16:45:18,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12906, PETRI_DIFFERENCE_MINUEND_PLACES=654, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=13973, PETRI_PLACES=677, PETRI_TRANSITIONS=688} [2024-06-27 16:45:18,582 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 655 predicate places. [2024-06-27 16:45:18,582 INFO L495 AbstractCegarLoop]: Abstraction has has 677 places, 688 transitions, 13973 flow [2024-06-27 16:45:18,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.666666666666667) internal successors, (154), 33 states have internal predecessors, (154), 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 16:45:18,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:45:18,583 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:45:18,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2024-06-27 16:45:18,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2024-06-27 16:45:18,797 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:45:18,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:45:18,797 INFO L85 PathProgramCache]: Analyzing trace with hash -991553698, now seen corresponding path program 172 times [2024-06-27 16:45:18,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:45:18,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201342614] [2024-06-27 16:45:18,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:45:18,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:45:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:45:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:45:19,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:45:19,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201342614] [2024-06-27 16:45:19,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201342614] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:45:19,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155129655] [2024-06-27 16:45:19,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:45:19,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:45:19,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:45:19,456 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:45:19,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2024-06-27 16:45:20,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:45:20,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:45:20,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 16:45:20,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:45:20,194 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:45:20,194 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 35 treesize of output 23 [2024-06-27 16:45:20,243 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:45:20,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:45:20,517 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-06-27 16:45:20,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-06-27 16:45:20,617 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:45:20,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155129655] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:45:20,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:45:20,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 12] total 37 [2024-06-27 16:45:20,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557682329] [2024-06-27 16:45:20,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:45:20,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-06-27 16:45:20,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:45:20,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-06-27 16:45:20,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1205, Unknown=0, NotChecked=0, Total=1332 [2024-06-27 16:45:20,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:45:20,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 677 places, 688 transitions, 13973 flow. Second operand has 37 states, 37 states have (on average 4.5675675675675675) internal successors, (169), 37 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 16:45:20,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:45:20,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:45:20,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:45:23,925 INFO L124 PetriNetUnfolderBase]: 2718/4848 cut-off events. [2024-06-27 16:45:23,926 INFO L125 PetriNetUnfolderBase]: For 982603/982603 co-relation queries the response was YES. [2024-06-27 16:45:24,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86650 conditions, 4848 events. 2718/4848 cut-off events. For 982603/982603 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 32944 event pairs, 225 based on Foata normal form. 2/4846 useless extension candidates. Maximal degree in co-relation 86427. Up to 3419 conditions per place. [2024-06-27 16:45:24,042 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 482 selfloop transitions, 288 changer transitions 3/774 dead transitions. [2024-06-27 16:45:24,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 710 places, 774 transitions, 18414 flow [2024-06-27 16:45:24,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-06-27 16:45:24,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-06-27 16:45:24,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 244 transitions. [2024-06-27 16:45:24,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32620320855614976 [2024-06-27 16:45:24,043 INFO L175 Difference]: Start difference. First operand has 677 places, 688 transitions, 13973 flow. Second operand 34 states and 244 transitions. [2024-06-27 16:45:24,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 710 places, 774 transitions, 18414 flow [2024-06-27 16:45:29,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 696 places, 774 transitions, 17632 flow, removed 247 selfloop flow, removed 14 redundant places. [2024-06-27 16:45:29,838 INFO L231 Difference]: Finished difference. Result has 703 places, 713 transitions, 15329 flow [2024-06-27 16:45:29,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=13193, PETRI_DIFFERENCE_MINUEND_PLACES=663, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=15329, PETRI_PLACES=703, PETRI_TRANSITIONS=713} [2024-06-27 16:45:29,839 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 681 predicate places. [2024-06-27 16:45:29,839 INFO L495 AbstractCegarLoop]: Abstraction has has 703 places, 713 transitions, 15329 flow [2024-06-27 16:45:29,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.5675675675675675) internal successors, (169), 37 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 16:45:29,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:45:29,839 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:45:29,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2024-06-27 16:45:30,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:45:30,048 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:45:30,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:45:30,048 INFO L85 PathProgramCache]: Analyzing trace with hash 713451230, now seen corresponding path program 173 times [2024-06-27 16:45:30,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:45:30,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617893063] [2024-06-27 16:45:30,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:45:30,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:45:30,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:45:30,681 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:45:30,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:45:30,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617893063] [2024-06-27 16:45:30,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617893063] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:45:30,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591134093] [2024-06-27 16:45:30,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:45:30,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:45:30,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:45:30,683 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:45:30,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2024-06-27 16:45:31,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:45:31,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:45:31,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 45 conjunts are in the unsatisfiable core [2024-06-27 16:45:31,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:45:31,512 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:45:31,512 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 27 treesize of output 19 [2024-06-27 16:45:31,544 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:45:31,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:45:31,945 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-06-27 16:45:31,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-06-27 16:45:32,050 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:45:32,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591134093] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:45:32,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:45:32,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 12] total 36 [2024-06-27 16:45:32,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605592779] [2024-06-27 16:45:32,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:45:32,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-06-27 16:45:32,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:45:32,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-06-27 16:45:32,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2024-06-27 16:45:32,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:45:32,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 703 places, 713 transitions, 15329 flow. Second operand has 36 states, 36 states have (on average 4.638888888888889) internal successors, (167), 36 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 16:45:32,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:45:32,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:45:32,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:45:34,920 INFO L124 PetriNetUnfolderBase]: 2722/4859 cut-off events. [2024-06-27 16:45:34,920 INFO L125 PetriNetUnfolderBase]: For 1007567/1007567 co-relation queries the response was YES. [2024-06-27 16:45:35,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87810 conditions, 4859 events. 2722/4859 cut-off events. For 1007567/1007567 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 33033 event pairs, 262 based on Foata normal form. 1/4856 useless extension candidates. Maximal degree in co-relation 87580. Up to 3695 conditions per place. [2024-06-27 16:45:35,045 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 529 selfloop transitions, 216 changer transitions 2/748 dead transitions. [2024-06-27 16:45:35,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 723 places, 748 transitions, 17456 flow [2024-06-27 16:45:35,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 16:45:35,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 16:45:35,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 152 transitions. [2024-06-27 16:45:35,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.329004329004329 [2024-06-27 16:45:35,046 INFO L175 Difference]: Start difference. First operand has 703 places, 713 transitions, 15329 flow. Second operand 21 states and 152 transitions. [2024-06-27 16:45:35,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 723 places, 748 transitions, 17456 flow [2024-06-27 16:45:40,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 699 places, 748 transitions, 16591 flow, removed 331 selfloop flow, removed 24 redundant places. [2024-06-27 16:45:40,736 INFO L231 Difference]: Finished difference. Result has 703 places, 719 transitions, 15187 flow [2024-06-27 16:45:40,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=14464, PETRI_DIFFERENCE_MINUEND_PLACES=679, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=15187, PETRI_PLACES=703, PETRI_TRANSITIONS=719} [2024-06-27 16:45:40,737 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 681 predicate places. [2024-06-27 16:45:40,737 INFO L495 AbstractCegarLoop]: Abstraction has has 703 places, 719 transitions, 15187 flow [2024-06-27 16:45:40,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.638888888888889) internal successors, (167), 36 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 16:45:40,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:45:40,737 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:45:40,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2024-06-27 16:45:40,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:45:40,951 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:45:40,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:45:40,952 INFO L85 PathProgramCache]: Analyzing trace with hash -809552994, now seen corresponding path program 174 times [2024-06-27 16:45:40,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:45:40,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989588423] [2024-06-27 16:45:40,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:45:40,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:45:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:45:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:45:41,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:45:41,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989588423] [2024-06-27 16:45:41,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989588423] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:45:41,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095892461] [2024-06-27 16:45:41,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:45:41,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:45:41,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:45:41,565 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:45:41,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2024-06-27 16:45:42,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 16:45:42,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:45:42,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 47 conjunts are in the unsatisfiable core [2024-06-27 16:45:42,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:45:42,409 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:45:42,410 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 27 treesize of output 19 [2024-06-27 16:45:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-06-27 16:45:42,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:45:42,696 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-06-27 16:45:42,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-06-27 16:45:42,808 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:45:42,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095892461] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:45:42,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:45:42,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 12] total 37 [2024-06-27 16:45:42,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786667099] [2024-06-27 16:45:42,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:45:42,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-06-27 16:45:42,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:45:42,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-06-27 16:45:42,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1191, Unknown=0, NotChecked=0, Total=1332 [2024-06-27 16:45:42,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:45:42,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 703 places, 719 transitions, 15187 flow. Second operand has 37 states, 37 states have (on average 4.594594594594595) internal successors, (170), 37 states have internal predecessors, (170), 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 16:45:42,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:45:42,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:45:42,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:45:45,965 INFO L124 PetriNetUnfolderBase]: 2771/4946 cut-off events. [2024-06-27 16:45:45,965 INFO L125 PetriNetUnfolderBase]: For 1032403/1032403 co-relation queries the response was YES. [2024-06-27 16:45:46,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90236 conditions, 4946 events. 2771/4946 cut-off events. For 1032403/1032403 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 33798 event pairs, 238 based on Foata normal form. 3/4945 useless extension candidates. Maximal degree in co-relation 90003. Up to 3526 conditions per place. [2024-06-27 16:45:46,091 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 504 selfloop transitions, 280 changer transitions 2/787 dead transitions. [2024-06-27 16:45:46,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 734 places, 787 transitions, 18826 flow [2024-06-27 16:45:46,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-06-27 16:45:46,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-06-27 16:45:46,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 235 transitions. [2024-06-27 16:45:46,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3338068181818182 [2024-06-27 16:45:46,092 INFO L175 Difference]: Start difference. First operand has 703 places, 719 transitions, 15187 flow. Second operand 32 states and 235 transitions. [2024-06-27 16:45:46,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 734 places, 787 transitions, 18826 flow [2024-06-27 16:45:52,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 718 places, 787 transitions, 18135 flow, removed 139 selfloop flow, removed 16 redundant places. [2024-06-27 16:45:52,142 INFO L231 Difference]: Finished difference. Result has 721 places, 727 transitions, 15749 flow [2024-06-27 16:45:52,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=14496, PETRI_DIFFERENCE_MINUEND_PLACES=687, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=15749, PETRI_PLACES=721, PETRI_TRANSITIONS=727} [2024-06-27 16:45:52,143 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 699 predicate places. [2024-06-27 16:45:52,143 INFO L495 AbstractCegarLoop]: Abstraction has has 721 places, 727 transitions, 15749 flow [2024-06-27 16:45:52,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.594594594594595) internal successors, (170), 37 states have internal predecessors, (170), 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 16:45:52,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:45:52,143 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:45:52,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2024-06-27 16:45:52,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:45:52,357 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:45:52,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:45:52,358 INFO L85 PathProgramCache]: Analyzing trace with hash -2034469436, now seen corresponding path program 175 times [2024-06-27 16:45:52,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:45:52,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056837146] [2024-06-27 16:45:52,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:45:52,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:45:52,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:45:53,091 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:45:53,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:45:53,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056837146] [2024-06-27 16:45:53,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056837146] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:45:53,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605615351] [2024-06-27 16:45:53,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:45:53,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:45:53,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:45:53,093 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:45:53,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2024-06-27 16:45:53,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:45:53,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 16:45:53,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:45:53,838 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:45:53,838 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 35 treesize of output 23 [2024-06-27 16:45:53,903 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:45:53,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:45:54,314 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-06-27 16:45:54,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-06-27 16:45:54,377 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:45:54,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605615351] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:45:54,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:45:54,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 12] total 37 [2024-06-27 16:45:54,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113641445] [2024-06-27 16:45:54,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:45:54,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-06-27 16:45:54,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:45:54,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-06-27 16:45:54,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1198, Unknown=0, NotChecked=0, Total=1332 [2024-06-27 16:45:54,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:45:54,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 721 places, 727 transitions, 15749 flow. Second operand has 37 states, 37 states have (on average 4.5675675675675675) internal successors, (169), 37 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 16:45:54,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:45:54,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:45:54,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:45:57,345 INFO L124 PetriNetUnfolderBase]: 2775/4957 cut-off events. [2024-06-27 16:45:57,345 INFO L125 PetriNetUnfolderBase]: For 1047831/1047831 co-relation queries the response was YES. [2024-06-27 16:45:57,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90833 conditions, 4957 events. 2775/4957 cut-off events. For 1047831/1047831 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 33940 event pairs, 280 based on Foata normal form. 1/4954 useless extension candidates. Maximal degree in co-relation 90597. Up to 3781 conditions per place. [2024-06-27 16:45:57,474 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 538 selfloop transitions, 216 changer transitions 4/759 dead transitions. [2024-06-27 16:45:57,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 742 places, 759 transitions, 17843 flow [2024-06-27 16:45:57,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 16:45:57,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 16:45:57,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 156 transitions. [2024-06-27 16:45:57,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32231404958677684 [2024-06-27 16:45:57,475 INFO L175 Difference]: Start difference. First operand has 721 places, 727 transitions, 15749 flow. Second operand 22 states and 156 transitions. [2024-06-27 16:45:57,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 742 places, 759 transitions, 17843 flow [2024-06-27 16:46:03,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 715 places, 759 transitions, 17100 flow, removed 166 selfloop flow, removed 27 redundant places. [2024-06-27 16:46:03,675 INFO L231 Difference]: Finished difference. Result has 716 places, 727 transitions, 15537 flow [2024-06-27 16:46:03,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=15008, PETRI_DIFFERENCE_MINUEND_PLACES=694, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=15537, PETRI_PLACES=716, PETRI_TRANSITIONS=727} [2024-06-27 16:46:03,676 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 694 predicate places. [2024-06-27 16:46:03,676 INFO L495 AbstractCegarLoop]: Abstraction has has 716 places, 727 transitions, 15537 flow [2024-06-27 16:46:03,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.5675675675675675) internal successors, (169), 37 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 16:46:03,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:46:03,676 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:46:03,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2024-06-27 16:46:03,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2024-06-27 16:46:03,890 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:46:03,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:46:03,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1413496968, now seen corresponding path program 176 times [2024-06-27 16:46:03,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:46:03,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665830602] [2024-06-27 16:46:03,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:46:03,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:46:03,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:46:04,503 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:46:04,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:46:04,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665830602] [2024-06-27 16:46:04,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665830602] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:46:04,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310552329] [2024-06-27 16:46:04,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:46:04,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:46:04,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:46:04,505 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:46:04,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2024-06-27 16:46:05,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:46:05,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:46:05,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 47 conjunts are in the unsatisfiable core [2024-06-27 16:46:05,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:46:05,334 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:46:05,335 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 27 treesize of output 19 [2024-06-27 16:46:05,345 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-06-27 16:46:05,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:46:05,635 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-06-27 16:46:05,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-06-27 16:46:05,747 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:46:05,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310552329] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:46:05,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:46:05,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 12] total 36 [2024-06-27 16:46:05,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475300477] [2024-06-27 16:46:05,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:46:05,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-06-27 16:46:05,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:46:05,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-06-27 16:46:05,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2024-06-27 16:46:05,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:46:05,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 716 places, 727 transitions, 15537 flow. Second operand has 36 states, 36 states have (on average 4.583333333333333) internal successors, (165), 36 states have internal predecessors, (165), 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 16:46:05,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:46:05,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:46:05,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:46:08,850 INFO L124 PetriNetUnfolderBase]: 2785/4990 cut-off events. [2024-06-27 16:46:08,850 INFO L125 PetriNetUnfolderBase]: For 1054616/1054616 co-relation queries the response was YES. [2024-06-27 16:46:08,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91286 conditions, 4990 events. 2785/4990 cut-off events. For 1054616/1054616 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 34309 event pairs, 281 based on Foata normal form. 2/4988 useless extension candidates. Maximal degree in co-relation 91050. Up to 3719 conditions per place. [2024-06-27 16:46:08,986 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 537 selfloop transitions, 234 changer transitions 2/774 dead transitions. [2024-06-27 16:46:08,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 742 places, 774 transitions, 18073 flow [2024-06-27 16:46:08,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 16:46:08,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 16:46:08,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 199 transitions. [2024-06-27 16:46:08,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.335016835016835 [2024-06-27 16:46:08,988 INFO L175 Difference]: Start difference. First operand has 716 places, 727 transitions, 15537 flow. Second operand 27 states and 199 transitions. [2024-06-27 16:46:08,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 742 places, 774 transitions, 18073 flow [2024-06-27 16:46:16,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 722 places, 774 transitions, 17589 flow, removed 27 selfloop flow, removed 20 redundant places. [2024-06-27 16:46:16,146 INFO L231 Difference]: Finished difference. Result has 724 places, 730 transitions, 15806 flow [2024-06-27 16:46:16,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=15053, PETRI_DIFFERENCE_MINUEND_PLACES=696, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=15806, PETRI_PLACES=724, PETRI_TRANSITIONS=730} [2024-06-27 16:46:16,147 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 702 predicate places. [2024-06-27 16:46:16,147 INFO L495 AbstractCegarLoop]: Abstraction has has 724 places, 730 transitions, 15806 flow [2024-06-27 16:46:16,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.583333333333333) internal successors, (165), 36 states have internal predecessors, (165), 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 16:46:16,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:46:16,147 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:46:16,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2024-06-27 16:46:16,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:46:16,361 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:46:16,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:46:16,362 INFO L85 PathProgramCache]: Analyzing trace with hash 831163968, now seen corresponding path program 177 times [2024-06-27 16:46:16,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:46:16,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827822029] [2024-06-27 16:46:16,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:46:16,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:46:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:46:16,924 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:46:16,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:46:16,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827822029] [2024-06-27 16:46:16,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827822029] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:46:16,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186615760] [2024-06-27 16:46:16,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:46:16,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:46:16,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:46:16,926 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:46:16,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2024-06-27 16:46:17,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:46:17,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:46:17,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 41 conjunts are in the unsatisfiable core [2024-06-27 16:46:17,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:46:17,731 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:46:17,731 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 27 treesize of output 19 [2024-06-27 16:46:17,742 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:46:17,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:46:17,993 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-06-27 16:46:17,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-06-27 16:46:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:46:18,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186615760] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:46:18,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:46:18,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 12] total 35 [2024-06-27 16:46:18,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375186307] [2024-06-27 16:46:18,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:46:18,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-06-27 16:46:18,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:46:18,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-06-27 16:46:18,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2024-06-27 16:46:18,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:46:18,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 724 places, 730 transitions, 15806 flow. Second operand has 35 states, 35 states have (on average 4.6) internal successors, (161), 35 states have internal predecessors, (161), 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 16:46:18,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:46:18,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:46:18,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:46:21,337 INFO L124 PetriNetUnfolderBase]: 2901/5190 cut-off events. [2024-06-27 16:46:21,337 INFO L125 PetriNetUnfolderBase]: For 1119843/1119843 co-relation queries the response was YES. [2024-06-27 16:46:21,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96844 conditions, 5190 events. 2901/5190 cut-off events. For 1119843/1119843 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 35894 event pairs, 319 based on Foata normal form. 4/5194 useless extension candidates. Maximal degree in co-relation 96606. Up to 4536 conditions per place. [2024-06-27 16:46:21,481 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 630 selfloop transitions, 167 changer transitions 3/801 dead transitions. [2024-06-27 16:46:21,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 756 places, 801 transitions, 19898 flow [2024-06-27 16:46:21,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-06-27 16:46:21,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-06-27 16:46:21,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 220 transitions. [2024-06-27 16:46:21,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30303030303030304 [2024-06-27 16:46:21,483 INFO L175 Difference]: Start difference. First operand has 724 places, 730 transitions, 15806 flow. Second operand 33 states and 220 transitions. [2024-06-27 16:46:21,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 756 places, 801 transitions, 19898 flow [2024-06-27 16:46:27,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 732 places, 801 transitions, 19424 flow, removed 64 selfloop flow, removed 24 redundant places. [2024-06-27 16:46:27,551 INFO L231 Difference]: Finished difference. Result has 738 places, 754 transitions, 17008 flow [2024-06-27 16:46:27,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=15347, PETRI_DIFFERENCE_MINUEND_PLACES=700, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=17008, PETRI_PLACES=738, PETRI_TRANSITIONS=754} [2024-06-27 16:46:27,552 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 716 predicate places. [2024-06-27 16:46:27,552 INFO L495 AbstractCegarLoop]: Abstraction has has 738 places, 754 transitions, 17008 flow [2024-06-27 16:46:27,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.6) internal successors, (161), 35 states have internal predecessors, (161), 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 16:46:27,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:46:27,553 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:46:27,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2024-06-27 16:46:27,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable185 [2024-06-27 16:46:27,766 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:46:27,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:46:27,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1220942822, now seen corresponding path program 178 times [2024-06-27 16:46:27,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:46:27,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421489405] [2024-06-27 16:46:27,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:46:27,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:46:27,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:46:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:46:28,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:46:28,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421489405] [2024-06-27 16:46:28,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421489405] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:46:28,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704621850] [2024-06-27 16:46:28,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:46:28,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:46:28,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:46:28,411 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:46:28,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2024-06-27 16:46:29,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:46:29,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:46:29,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 16:46:29,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:46:29,221 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:46:29,222 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 35 treesize of output 23 [2024-06-27 16:46:29,228 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:46:29,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:46:29,507 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-06-27 16:46:29,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-06-27 16:46:29,632 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:46:29,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704621850] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:46:29,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:46:29,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 12] total 36 [2024-06-27 16:46:29,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307615366] [2024-06-27 16:46:29,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:46:29,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-06-27 16:46:29,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:46:29,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-06-27 16:46:29,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2024-06-27 16:46:29,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:46:29,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 738 places, 754 transitions, 17008 flow. Second operand has 36 states, 36 states have (on average 4.555555555555555) internal successors, (164), 36 states have internal predecessors, (164), 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 16:46:29,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:46:29,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:46:29,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:46:32,742 INFO L124 PetriNetUnfolderBase]: 2965/5309 cut-off events. [2024-06-27 16:46:32,742 INFO L125 PetriNetUnfolderBase]: For 1194758/1194758 co-relation queries the response was YES. [2024-06-27 16:46:32,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101347 conditions, 5309 events. 2965/5309 cut-off events. For 1194758/1194758 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 36935 event pairs, 345 based on Foata normal form. 2/5307 useless extension candidates. Maximal degree in co-relation 101105. Up to 4669 conditions per place. [2024-06-27 16:46:32,882 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 648 selfloop transitions, 164 changer transitions 3/816 dead transitions. [2024-06-27 16:46:32,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 767 places, 816 transitions, 20987 flow [2024-06-27 16:46:32,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-06-27 16:46:32,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-06-27 16:46:32,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 216 transitions. [2024-06-27 16:46:32,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31671554252199413 [2024-06-27 16:46:32,884 INFO L175 Difference]: Start difference. First operand has 738 places, 754 transitions, 17008 flow. Second operand 31 states and 216 transitions. [2024-06-27 16:46:32,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 767 places, 816 transitions, 20987 flow [2024-06-27 16:46:39,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 743 places, 816 transitions, 20368 flow, removed 242 selfloop flow, removed 24 redundant places. [2024-06-27 16:46:39,882 INFO L231 Difference]: Finished difference. Result has 748 places, 768 transitions, 17977 flow [2024-06-27 16:46:39,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=16461, PETRI_DIFFERENCE_MINUEND_PLACES=713, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=17977, PETRI_PLACES=748, PETRI_TRANSITIONS=768} [2024-06-27 16:46:39,883 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 726 predicate places. [2024-06-27 16:46:39,883 INFO L495 AbstractCegarLoop]: Abstraction has has 748 places, 768 transitions, 17977 flow [2024-06-27 16:46:39,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.555555555555555) internal successors, (164), 36 states have internal predecessors, (164), 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 16:46:39,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:46:39,884 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:46:39,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Forceful destruction successful, exit code 0 [2024-06-27 16:46:40,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:46:40,097 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:46:40,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:46:40,098 INFO L85 PathProgramCache]: Analyzing trace with hash -550272022, now seen corresponding path program 179 times [2024-06-27 16:46:40,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:46:40,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798211504] [2024-06-27 16:46:40,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:46:40,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:46:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:46:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-27 16:46:40,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:46:40,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798211504] [2024-06-27 16:46:40,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798211504] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:46:40,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36041244] [2024-06-27 16:46:40,796 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:46:40,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:46:40,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:46:40,797 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:46:40,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2024-06-27 16:46:41,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:46:41,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:46:41,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 49 conjunts are in the unsatisfiable core [2024-06-27 16:46:41,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:46:41,959 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:46:41,959 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 27 treesize of output 19 [2024-06-27 16:46:41,993 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-06-27 16:46:41,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:46:42,307 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-06-27 16:46:42,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-06-27 16:46:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 16:46:42,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36041244] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:46:42,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:46:42,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 12] total 40 [2024-06-27 16:46:42,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654096437] [2024-06-27 16:46:42,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:46:42,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-06-27 16:46:42,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:46:42,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-06-27 16:46:42,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1406, Unknown=0, NotChecked=0, Total=1560 [2024-06-27 16:46:42,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-06-27 16:46:42,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 748 places, 768 transitions, 17977 flow. Second operand has 40 states, 40 states have (on average 4.575) internal successors, (183), 40 states have internal predecessors, (183), 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 16:46:42,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:46:42,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-06-27 16:46:42,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:46:45,762 INFO L124 PetriNetUnfolderBase]: 3016/5400 cut-off events. [2024-06-27 16:46:45,762 INFO L125 PetriNetUnfolderBase]: For 1251471/1251471 co-relation queries the response was YES. [2024-06-27 16:46:45,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104302 conditions, 5400 events. 3016/5400 cut-off events. For 1251471/1251471 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 37710 event pairs, 349 based on Foata normal form. 2/5398 useless extension candidates. Maximal degree in co-relation 104056. Up to 4864 conditions per place. [2024-06-27 16:46:45,909 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 667 selfloop transitions, 154 changer transitions 4/826 dead transitions. [2024-06-27 16:46:45,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 778 places, 826 transitions, 21494 flow [2024-06-27 16:46:45,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-06-27 16:46:45,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-06-27 16:46:45,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 212 transitions. [2024-06-27 16:46:45,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31085043988269795 [2024-06-27 16:46:45,911 INFO L175 Difference]: Start difference. First operand has 748 places, 768 transitions, 17977 flow. Second operand 31 states and 212 transitions. [2024-06-27 16:46:45,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 778 places, 826 transitions, 21494 flow Killed by 15