./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:31:02,600 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:31:02,664 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:31:02,670 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:31:02,671 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:31:02,697 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:31:02,698 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:31:02,698 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:31:02,699 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:31:02,700 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:31:02,701 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:31:02,701 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:31:02,702 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:31:02,705 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:31:02,705 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:31:02,706 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:31:02,706 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:31:02,706 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:31:02,706 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:31:02,706 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:31:02,706 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:31:02,707 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:31:02,707 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:31:02,707 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:31:02,708 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:31:02,708 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:31:02,708 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:31:02,708 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:31:02,709 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:31:02,709 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:31:02,709 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:31:02,709 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:31:02,709 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:31:02,710 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:31:02,710 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:31:02,710 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:31:02,712 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:31:02,712 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:31:02,712 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:31:02,713 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:31:02,713 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:31:02,713 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:31:02,714 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 [2024-10-11 14:31:02,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:31:02,947 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:31:02,949 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:31:02,950 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:31:02,950 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:31:02,951 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2024-10-11 14:31:04,278 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:31:04,428 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:31:04,429 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2024-10-11 14:31:04,434 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/2a5452ac0/63ca85cfbdb445759f8af69094bb0776/FLAG6378dbc3c [2024-10-11 14:31:04,845 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/2a5452ac0/63ca85cfbdb445759f8af69094bb0776 [2024-10-11 14:31:04,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:31:04,848 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:31:04,849 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:31:04,849 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:31:04,855 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:31:04,856 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:31:04" (1/1) ... [2024-10-11 14:31:04,857 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67f0fd16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:04, skipping insertion in model container [2024-10-11 14:31:04,858 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:31:04" (1/1) ... [2024-10-11 14:31:04,877 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:31:05,055 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2707,2720] [2024-10-11 14:31:05,061 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:31:05,071 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:31:05,088 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2707,2720] [2024-10-11 14:31:05,090 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:31:05,122 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:31:05,123 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:05 WrapperNode [2024-10-11 14:31:05,123 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:31:05,124 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:31:05,124 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:31:05,124 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:31:05,138 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:05" (1/1) ... [2024-10-11 14:31:05,160 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:05" (1/1) ... [2024-10-11 14:31:05,185 INFO L138 Inliner]: procedures = 23, calls = 35, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 191 [2024-10-11 14:31:05,186 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:31:05,186 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:31:05,187 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:31:05,187 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:31:05,195 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:05" (1/1) ... [2024-10-11 14:31:05,195 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:05" (1/1) ... [2024-10-11 14:31:05,197 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:05" (1/1) ... [2024-10-11 14:31:05,212 INFO L175 MemorySlicer]: Split 14 memory accesses to 2 slices as follows [2, 12]. 86 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]. [2024-10-11 14:31:05,212 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:05" (1/1) ... [2024-10-11 14:31:05,212 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:05" (1/1) ... [2024-10-11 14:31:05,217 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:05" (1/1) ... [2024-10-11 14:31:05,219 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:05" (1/1) ... [2024-10-11 14:31:05,220 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:05" (1/1) ... [2024-10-11 14:31:05,221 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:05" (1/1) ... [2024-10-11 14:31:05,223 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:31:05,223 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:31:05,224 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:31:05,224 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:31:05,224 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:05" (1/1) ... [2024-10-11 14:31:05,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:31:05,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:05,263 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 14:31:05,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 14:31:05,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:31:05,315 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 14:31:05,315 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 14:31:05,315 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 14:31:05,315 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 14:31:05,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:31:05,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 14:31:05,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 14:31:05,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 14:31:05,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-11 14:31:05,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-11 14:31:05,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 14:31:05,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:31:05,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:31:05,317 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 14:31:05,317 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 14:31:05,319 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 14:31:05,416 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:31:05,418 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:31:05,729 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:31:05,730 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:31:05,933 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:31:05,934 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-11 14:31:05,934 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:05 BoogieIcfgContainer [2024-10-11 14:31:05,934 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:31:05,936 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:31:05,936 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:31:05,938 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:31:05,939 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:31:04" (1/3) ... [2024-10-11 14:31:05,939 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a533e97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:31:05, skipping insertion in model container [2024-10-11 14:31:05,939 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:05" (2/3) ... [2024-10-11 14:31:05,942 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a533e97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:31:05, skipping insertion in model container [2024-10-11 14:31:05,942 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:05" (3/3) ... [2024-10-11 14:31:05,943 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2024-10-11 14:31:05,959 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:31:05,959 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:31:05,959 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:31:06,047 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-11 14:31:06,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 26 transitions, 66 flow [2024-10-11 14:31:06,106 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2024-10-11 14:31:06,107 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:31:06,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 24 events. 4/24 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-10-11 14:31:06,109 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 26 transitions, 66 flow [2024-10-11 14:31:06,111 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 23 transitions, 58 flow [2024-10-11 14:31:06,118 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:31:06,123 INFO L333 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, 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;@6815538b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:31:06,124 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-11 14:31:06,134 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:31:06,134 INFO L124 PetriNetUnfolderBase]: 4/22 cut-off events. [2024-10-11 14:31:06,134 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:31:06,134 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:06,135 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:06,135 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:06,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:06,139 INFO L85 PathProgramCache]: Analyzing trace with hash -917773730, now seen corresponding path program 1 times [2024-10-11 14:31:06,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:06,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317707207] [2024-10-11 14:31:06,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:06,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:06,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:06,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:06,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:06,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317707207] [2024-10-11 14:31:06,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317707207] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:31:06,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:31:06,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:31:06,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026279126] [2024-10-11 14:31:06,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:06,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:31:06,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:06,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:31:06,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:31:06,375 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-10-11 14:31:06,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:06,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:06,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-10-11 14:31:06,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:06,480 INFO L124 PetriNetUnfolderBase]: 94/185 cut-off events. [2024-10-11 14:31:06,481 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-10-11 14:31:06,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 185 events. 94/185 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 598 event pairs, 22 based on Foata normal form. 1/183 useless extension candidates. Maximal degree in co-relation 317. Up to 113 conditions per place. [2024-10-11 14:31:06,485 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 27 selfloop transitions, 3 changer transitions 1/34 dead transitions. [2024-10-11 14:31:06,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 151 flow [2024-10-11 14:31:06,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:31:06,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:31:06,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2024-10-11 14:31:06,493 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6025641025641025 [2024-10-11 14:31:06,495 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 58 flow. Second operand 3 states and 47 transitions. [2024-10-11 14:31:06,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 151 flow [2024-10-11 14:31:06,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 34 transitions, 137 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-11 14:31:06,499 INFO L231 Difference]: Finished difference. Result has 25 places, 25 transitions, 69 flow [2024-10-11 14:31:06,500 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=25, PETRI_TRANSITIONS=25} [2024-10-11 14:31:06,502 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2024-10-11 14:31:06,503 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 25 transitions, 69 flow [2024-10-11 14:31:06,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:06,504 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:06,504 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:06,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:31:06,505 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:06,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:06,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1358368092, now seen corresponding path program 1 times [2024-10-11 14:31:06,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:06,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527243271] [2024-10-11 14:31:06,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:06,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:06,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:06,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:06,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527243271] [2024-10-11 14:31:06,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527243271] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:31:06,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:31:06,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:31:06,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711961435] [2024-10-11 14:31:06,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:06,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:31:06,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:06,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:31:06,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-11 14:31:06,694 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-10-11 14:31:06,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 25 transitions, 69 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:06,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:06,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-10-11 14:31:06,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:06,893 INFO L124 PetriNetUnfolderBase]: 188/338 cut-off events. [2024-10-11 14:31:06,894 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-10-11 14:31:06,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 338 events. 188/338 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1342 event pairs, 62 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 197. Up to 187 conditions per place. [2024-10-11 14:31:06,900 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 39 selfloop transitions, 9 changer transitions 1/51 dead transitions. [2024-10-11 14:31:06,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 51 transitions, 240 flow [2024-10-11 14:31:06,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:31:06,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:31:06,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2024-10-11 14:31:06,904 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-11 14:31:06,904 INFO L175 Difference]: Start difference. First operand has 25 places, 25 transitions, 69 flow. Second operand 5 states and 65 transitions. [2024-10-11 14:31:06,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 51 transitions, 240 flow [2024-10-11 14:31:06,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 51 transitions, 233 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:31:06,908 INFO L231 Difference]: Finished difference. Result has 31 places, 33 transitions, 124 flow [2024-10-11 14:31:06,908 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=31, PETRI_TRANSITIONS=33} [2024-10-11 14:31:06,908 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2024-10-11 14:31:06,910 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 33 transitions, 124 flow [2024-10-11 14:31:06,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:06,911 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:06,911 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:06,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 14:31:06,911 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:06,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:06,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1429312728, now seen corresponding path program 2 times [2024-10-11 14:31:06,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:06,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475733628] [2024-10-11 14:31:06,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:06,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:06,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:07,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:07,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475733628] [2024-10-11 14:31:07,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475733628] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:31:07,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:31:07,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 14:31:07,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009445520] [2024-10-11 14:31:07,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:07,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:31:07,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:07,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:31:07,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:31:07,057 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-10-11 14:31:07,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 33 transitions, 124 flow. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:07,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:07,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-10-11 14:31:07,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:07,265 INFO L124 PetriNetUnfolderBase]: 230/424 cut-off events. [2024-10-11 14:31:07,266 INFO L125 PetriNetUnfolderBase]: For 195/195 co-relation queries the response was YES. [2024-10-11 14:31:07,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1194 conditions, 424 events. 230/424 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1838 event pairs, 30 based on Foata normal form. 13/435 useless extension candidates. Maximal degree in co-relation 567. Up to 122 conditions per place. [2024-10-11 14:31:07,269 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 62 selfloop transitions, 12 changer transitions 1/77 dead transitions. [2024-10-11 14:31:07,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 77 transitions, 437 flow [2024-10-11 14:31:07,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:31:07,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:31:07,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2024-10-11 14:31:07,270 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5054945054945055 [2024-10-11 14:31:07,270 INFO L175 Difference]: Start difference. First operand has 31 places, 33 transitions, 124 flow. Second operand 7 states and 92 transitions. [2024-10-11 14:31:07,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 77 transitions, 437 flow [2024-10-11 14:31:07,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 77 transitions, 437 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 14:31:07,273 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 212 flow [2024-10-11 14:31:07,273 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=212, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2024-10-11 14:31:07,274 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2024-10-11 14:31:07,274 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 212 flow [2024-10-11 14:31:07,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:07,274 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:07,274 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:07,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 14:31:07,275 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:07,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:07,275 INFO L85 PathProgramCache]: Analyzing trace with hash 469608532, now seen corresponding path program 3 times [2024-10-11 14:31:07,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:07,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560613889] [2024-10-11 14:31:07,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:07,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:07,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:07,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:07,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:07,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560613889] [2024-10-11 14:31:07,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560613889] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:31:07,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:31:07,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:31:07,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771413461] [2024-10-11 14:31:07,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:07,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:31:07,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:07,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:31:07,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 14:31:07,356 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-10-11 14:31:07,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:07,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:07,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-10-11 14:31:07,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:07,492 INFO L124 PetriNetUnfolderBase]: 292/535 cut-off events. [2024-10-11 14:31:07,492 INFO L125 PetriNetUnfolderBase]: For 857/857 co-relation queries the response was YES. [2024-10-11 14:31:07,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1835 conditions, 535 events. 292/535 cut-off events. For 857/857 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2346 event pairs, 92 based on Foata normal form. 2/529 useless extension candidates. Maximal degree in co-relation 1351. Up to 262 conditions per place. [2024-10-11 14:31:07,504 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 52 selfloop transitions, 10 changer transitions 4/68 dead transitions. [2024-10-11 14:31:07,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 68 transitions, 497 flow [2024-10-11 14:31:07,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:31:07,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:31:07,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2024-10-11 14:31:07,507 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4846153846153846 [2024-10-11 14:31:07,507 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 212 flow. Second operand 5 states and 63 transitions. [2024-10-11 14:31:07,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 68 transitions, 497 flow [2024-10-11 14:31:07,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 68 transitions, 485 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-10-11 14:31:07,516 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 259 flow [2024-10-11 14:31:07,517 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=259, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-10-11 14:31:07,518 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 22 predicate places. [2024-10-11 14:31:07,518 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 259 flow [2024-10-11 14:31:07,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:07,519 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:07,519 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:07,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 14:31:07,519 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:07,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:07,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1005547373, now seen corresponding path program 1 times [2024-10-11 14:31:07,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:07,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372658062] [2024-10-11 14:31:07,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:07,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:07,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:07,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:07,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:07,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372658062] [2024-10-11 14:31:07,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372658062] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:31:07,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:31:07,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:31:07,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747617282] [2024-10-11 14:31:07,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:07,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:31:07,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:07,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:31:07,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 14:31:07,625 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-10-11 14:31:07,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 259 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:07,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:07,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-10-11 14:31:07,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:07,759 INFO L124 PetriNetUnfolderBase]: 305/553 cut-off events. [2024-10-11 14:31:07,759 INFO L125 PetriNetUnfolderBase]: For 1229/1233 co-relation queries the response was YES. [2024-10-11 14:31:07,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2039 conditions, 553 events. 305/553 cut-off events. For 1229/1233 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2519 event pairs, 107 based on Foata normal form. 3/549 useless extension candidates. Maximal degree in co-relation 1783. Up to 290 conditions per place. [2024-10-11 14:31:07,763 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 52 selfloop transitions, 7 changer transitions 7/69 dead transitions. [2024-10-11 14:31:07,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 69 transitions, 533 flow [2024-10-11 14:31:07,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:31:07,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:31:07,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 67 transitions. [2024-10-11 14:31:07,767 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5153846153846153 [2024-10-11 14:31:07,767 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 259 flow. Second operand 5 states and 67 transitions. [2024-10-11 14:31:07,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 69 transitions, 533 flow [2024-10-11 14:31:07,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 69 transitions, 494 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-10-11 14:31:07,773 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 261 flow [2024-10-11 14:31:07,773 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=261, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2024-10-11 14:31:07,775 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 25 predicate places. [2024-10-11 14:31:07,775 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 261 flow [2024-10-11 14:31:07,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:07,776 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:07,776 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:07,778 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 14:31:07,778 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:07,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:07,778 INFO L85 PathProgramCache]: Analyzing trace with hash -710500163, now seen corresponding path program 2 times [2024-10-11 14:31:07,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:07,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60330528] [2024-10-11 14:31:07,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:07,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:07,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:07,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:07,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:07,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60330528] [2024-10-11 14:31:07,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60330528] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:07,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139824161] [2024-10-11 14:31:07,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:31:07,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:07,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:07,870 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:07,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 14:31:07,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:31:07,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:31:07,939 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-11 14:31:07,942 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:07,985 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:08,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:08,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139824161] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:08,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:08,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-10-11 14:31:08,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815055667] [2024-10-11 14:31:08,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:08,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 14:31:08,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:08,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 14:31:08,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-11 14:31:08,045 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:31:08,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 261 flow. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:08,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:08,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:31:08,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:08,295 INFO L124 PetriNetUnfolderBase]: 428/738 cut-off events. [2024-10-11 14:31:08,296 INFO L125 PetriNetUnfolderBase]: For 1900/1900 co-relation queries the response was YES. [2024-10-11 14:31:08,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2730 conditions, 738 events. 428/738 cut-off events. For 1900/1900 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3120 event pairs, 22 based on Foata normal form. 12/748 useless extension candidates. Maximal degree in co-relation 2151. Up to 147 conditions per place. [2024-10-11 14:31:08,301 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 75 selfloop transitions, 52 changer transitions 2/130 dead transitions. [2024-10-11 14:31:08,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 130 transitions, 1038 flow [2024-10-11 14:31:08,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-11 14:31:08,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-11 14:31:08,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 135 transitions. [2024-10-11 14:31:08,303 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3708791208791209 [2024-10-11 14:31:08,303 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 261 flow. Second operand 14 states and 135 transitions. [2024-10-11 14:31:08,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 130 transitions, 1038 flow [2024-10-11 14:31:08,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 130 transitions, 981 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-10-11 14:31:08,309 INFO L231 Difference]: Finished difference. Result has 65 places, 79 transitions, 678 flow [2024-10-11 14:31:08,309 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=678, PETRI_PLACES=65, PETRI_TRANSITIONS=79} [2024-10-11 14:31:08,309 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 39 predicate places. [2024-10-11 14:31:08,310 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 79 transitions, 678 flow [2024-10-11 14:31:08,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:08,310 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:08,310 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:08,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-11 14:31:08,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:08,511 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:08,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:08,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1226407250, now seen corresponding path program 4 times [2024-10-11 14:31:08,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:08,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167121322] [2024-10-11 14:31:08,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:08,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:08,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:08,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:08,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:08,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167121322] [2024-10-11 14:31:08,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167121322] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:31:08,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:31:08,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:31:08,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232442149] [2024-10-11 14:31:08,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:08,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:31:08,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:08,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:31:08,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-11 14:31:08,588 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:31:08,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 79 transitions, 678 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) [2024-10-11 14:31:08,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:08,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:31:08,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:08,723 INFO L124 PetriNetUnfolderBase]: 417/721 cut-off events. [2024-10-11 14:31:08,723 INFO L125 PetriNetUnfolderBase]: For 2403/2403 co-relation queries the response was YES. [2024-10-11 14:31:08,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3007 conditions, 721 events. 417/721 cut-off events. For 2403/2403 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3054 event pairs, 131 based on Foata normal form. 8/727 useless extension candidates. Maximal degree in co-relation 2651. Up to 433 conditions per place. [2024-10-11 14:31:08,727 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 77 selfloop transitions, 27 changer transitions 0/105 dead transitions. [2024-10-11 14:31:08,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 105 transitions, 1018 flow [2024-10-11 14:31:08,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:31:08,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:31:08,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-10-11 14:31:08,728 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49230769230769234 [2024-10-11 14:31:08,728 INFO L175 Difference]: Start difference. First operand has 65 places, 79 transitions, 678 flow. Second operand 5 states and 64 transitions. [2024-10-11 14:31:08,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 105 transitions, 1018 flow [2024-10-11 14:31:08,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 105 transitions, 953 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-10-11 14:31:08,735 INFO L231 Difference]: Finished difference. Result has 67 places, 80 transitions, 682 flow [2024-10-11 14:31:08,735 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=682, PETRI_PLACES=67, PETRI_TRANSITIONS=80} [2024-10-11 14:31:08,736 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 41 predicate places. [2024-10-11 14:31:08,736 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 80 transitions, 682 flow [2024-10-11 14:31:08,736 INFO L472 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) [2024-10-11 14:31:08,736 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:08,736 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:08,736 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-11 14:31:08,736 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:08,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:08,737 INFO L85 PathProgramCache]: Analyzing trace with hash -641270421, now seen corresponding path program 3 times [2024-10-11 14:31:08,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:08,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887327721] [2024-10-11 14:31:08,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:08,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:08,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:08,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:08,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:08,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887327721] [2024-10-11 14:31:08,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887327721] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:31:08,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:31:08,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 14:31:08,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119640217] [2024-10-11 14:31:08,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:08,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:31:08,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:08,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:31:08,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:31:08,804 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:31:08,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 80 transitions, 682 flow. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:08,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:08,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:31:08,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:08,932 INFO L124 PetriNetUnfolderBase]: 429/741 cut-off events. [2024-10-11 14:31:08,933 INFO L125 PetriNetUnfolderBase]: For 2543/2543 co-relation queries the response was YES. [2024-10-11 14:31:08,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3128 conditions, 741 events. 429/741 cut-off events. For 2543/2543 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3163 event pairs, 132 based on Foata normal form. 8/747 useless extension candidates. Maximal degree in co-relation 2815. Up to 433 conditions per place. [2024-10-11 14:31:08,937 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 81 selfloop transitions, 34 changer transitions 0/116 dead transitions. [2024-10-11 14:31:08,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 116 transitions, 1106 flow [2024-10-11 14:31:08,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:31:08,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:31:08,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 73 transitions. [2024-10-11 14:31:08,938 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-10-11 14:31:08,938 INFO L175 Difference]: Start difference. First operand has 67 places, 80 transitions, 682 flow. Second operand 6 states and 73 transitions. [2024-10-11 14:31:08,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 116 transitions, 1106 flow [2024-10-11 14:31:08,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 116 transitions, 1034 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-11 14:31:08,944 INFO L231 Difference]: Finished difference. Result has 69 places, 83 transitions, 723 flow [2024-10-11 14:31:08,944 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=723, PETRI_PLACES=69, PETRI_TRANSITIONS=83} [2024-10-11 14:31:08,944 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 43 predicate places. [2024-10-11 14:31:08,945 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 83 transitions, 723 flow [2024-10-11 14:31:08,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:08,945 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:08,945 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:08,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-11 14:31:08,945 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:08,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:08,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1589498937, now seen corresponding path program 4 times [2024-10-11 14:31:08,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:08,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729993276] [2024-10-11 14:31:08,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:08,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:09,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:09,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729993276] [2024-10-11 14:31:09,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729993276] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:31:09,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:31:09,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:31:09,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453424446] [2024-10-11 14:31:09,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:09,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:31:09,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:09,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:31:09,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 14:31:09,008 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-10-11 14:31:09,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 83 transitions, 723 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:09,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:09,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-10-11 14:31:09,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:09,163 INFO L124 PetriNetUnfolderBase]: 383/686 cut-off events. [2024-10-11 14:31:09,163 INFO L125 PetriNetUnfolderBase]: For 2408/2426 co-relation queries the response was YES. [2024-10-11 14:31:09,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2941 conditions, 686 events. 383/686 cut-off events. For 2408/2426 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3081 event pairs, 113 based on Foata normal form. 3/679 useless extension candidates. Maximal degree in co-relation 2553. Up to 394 conditions per place. [2024-10-11 14:31:09,168 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 63 selfloop transitions, 23 changer transitions 4/108 dead transitions. [2024-10-11 14:31:09,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 108 transitions, 1042 flow [2024-10-11 14:31:09,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:31:09,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:31:09,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2024-10-11 14:31:09,170 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4846153846153846 [2024-10-11 14:31:09,170 INFO L175 Difference]: Start difference. First operand has 69 places, 83 transitions, 723 flow. Second operand 5 states and 63 transitions. [2024-10-11 14:31:09,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 108 transitions, 1042 flow [2024-10-11 14:31:09,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 108 transitions, 994 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 14:31:09,176 INFO L231 Difference]: Finished difference. Result has 71 places, 82 transitions, 714 flow [2024-10-11 14:31:09,176 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=714, PETRI_PLACES=71, PETRI_TRANSITIONS=82} [2024-10-11 14:31:09,176 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 45 predicate places. [2024-10-11 14:31:09,176 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 82 transitions, 714 flow [2024-10-11 14:31:09,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:09,177 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:09,177 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:09,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-11 14:31:09,177 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:09,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:09,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1656258960, now seen corresponding path program 5 times [2024-10-11 14:31:09,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:09,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141247102] [2024-10-11 14:31:09,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:09,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:09,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:09,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:09,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141247102] [2024-10-11 14:31:09,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141247102] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:31:09,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:31:09,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 14:31:09,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998484742] [2024-10-11 14:31:09,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:09,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:31:09,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:09,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:31:09,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:31:09,266 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:31:09,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 82 transitions, 714 flow. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:09,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:09,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:31:09,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:09,443 INFO L124 PetriNetUnfolderBase]: 492/849 cut-off events. [2024-10-11 14:31:09,443 INFO L125 PetriNetUnfolderBase]: For 2706/2706 co-relation queries the response was YES. [2024-10-11 14:31:09,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3606 conditions, 849 events. 492/849 cut-off events. For 2706/2706 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3784 event pairs, 129 based on Foata normal form. 9/856 useless extension candidates. Maximal degree in co-relation 3116. Up to 439 conditions per place. [2024-10-11 14:31:09,448 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 90 selfloop transitions, 30 changer transitions 0/121 dead transitions. [2024-10-11 14:31:09,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 121 transitions, 1183 flow [2024-10-11 14:31:09,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:31:09,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:31:09,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 74 transitions. [2024-10-11 14:31:09,449 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-10-11 14:31:09,449 INFO L175 Difference]: Start difference. First operand has 71 places, 82 transitions, 714 flow. Second operand 6 states and 74 transitions. [2024-10-11 14:31:09,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 121 transitions, 1183 flow [2024-10-11 14:31:09,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 121 transitions, 1127 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-10-11 14:31:09,455 INFO L231 Difference]: Finished difference. Result has 72 places, 86 transitions, 779 flow [2024-10-11 14:31:09,455 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=779, PETRI_PLACES=72, PETRI_TRANSITIONS=86} [2024-10-11 14:31:09,456 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 46 predicate places. [2024-10-11 14:31:09,456 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 86 transitions, 779 flow [2024-10-11 14:31:09,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:09,456 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:09,456 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:09,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-11 14:31:09,456 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:09,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:09,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1210490047, now seen corresponding path program 5 times [2024-10-11 14:31:09,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:09,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880683480] [2024-10-11 14:31:09,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:09,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:09,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:09,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:09,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880683480] [2024-10-11 14:31:09,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880683480] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:31:09,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:31:09,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:31:09,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038678178] [2024-10-11 14:31:09,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:09,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:31:09,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:09,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:31:09,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-11 14:31:09,514 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-10-11 14:31:09,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 86 transitions, 779 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:09,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:09,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-10-11 14:31:09,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:09,646 INFO L124 PetriNetUnfolderBase]: 433/779 cut-off events. [2024-10-11 14:31:09,647 INFO L125 PetriNetUnfolderBase]: For 3021/3045 co-relation queries the response was YES. [2024-10-11 14:31:09,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3340 conditions, 779 events. 433/779 cut-off events. For 3021/3045 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3641 event pairs, 137 based on Foata normal form. 3/773 useless extension candidates. Maximal degree in co-relation 2867. Up to 412 conditions per place. [2024-10-11 14:31:09,651 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 60 selfloop transitions, 30 changer transitions 1/109 dead transitions. [2024-10-11 14:31:09,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 109 transitions, 1116 flow [2024-10-11 14:31:09,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:31:09,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:31:09,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2024-10-11 14:31:09,652 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-11 14:31:09,652 INFO L175 Difference]: Start difference. First operand has 72 places, 86 transitions, 779 flow. Second operand 5 states and 65 transitions. [2024-10-11 14:31:09,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 109 transitions, 1116 flow [2024-10-11 14:31:09,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 109 transitions, 1057 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-10-11 14:31:09,657 INFO L231 Difference]: Finished difference. Result has 74 places, 92 transitions, 876 flow [2024-10-11 14:31:09,657 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=876, PETRI_PLACES=74, PETRI_TRANSITIONS=92} [2024-10-11 14:31:09,658 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 48 predicate places. [2024-10-11 14:31:09,658 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 92 transitions, 876 flow [2024-10-11 14:31:09,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:09,658 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:09,658 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:09,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-11 14:31:09,658 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:09,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:09,659 INFO L85 PathProgramCache]: Analyzing trace with hash -111148459, now seen corresponding path program 6 times [2024-10-11 14:31:09,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:09,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033153450] [2024-10-11 14:31:09,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:09,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:09,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:09,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:09,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033153450] [2024-10-11 14:31:09,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033153450] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:31:09,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:31:09,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 14:31:09,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766876080] [2024-10-11 14:31:09,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:09,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:31:09,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:09,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:31:09,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:31:09,752 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:31:09,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 92 transitions, 876 flow. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:09,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:09,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:31:09,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:09,928 INFO L124 PetriNetUnfolderBase]: 506/874 cut-off events. [2024-10-11 14:31:09,929 INFO L125 PetriNetUnfolderBase]: For 3156/3156 co-relation queries the response was YES. [2024-10-11 14:31:09,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3703 conditions, 874 events. 506/874 cut-off events. For 3156/3156 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3922 event pairs, 140 based on Foata normal form. 16/888 useless extension candidates. Maximal degree in co-relation 3445. Up to 411 conditions per place. [2024-10-11 14:31:09,935 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 80 selfloop transitions, 35 changer transitions 2/118 dead transitions. [2024-10-11 14:31:09,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 118 transitions, 1232 flow [2024-10-11 14:31:09,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:31:09,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:31:09,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 76 transitions. [2024-10-11 14:31:09,935 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-10-11 14:31:09,936 INFO L175 Difference]: Start difference. First operand has 74 places, 92 transitions, 876 flow. Second operand 6 states and 76 transitions. [2024-10-11 14:31:09,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 118 transitions, 1232 flow [2024-10-11 14:31:09,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 118 transitions, 1185 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-10-11 14:31:09,946 INFO L231 Difference]: Finished difference. Result has 80 places, 94 transitions, 921 flow [2024-10-11 14:31:09,947 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=921, PETRI_PLACES=80, PETRI_TRANSITIONS=94} [2024-10-11 14:31:09,947 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 54 predicate places. [2024-10-11 14:31:09,948 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 94 transitions, 921 flow [2024-10-11 14:31:09,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:09,949 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:09,949 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:09,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-11 14:31:09,949 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:09,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:09,950 INFO L85 PathProgramCache]: Analyzing trace with hash 2077923714, now seen corresponding path program 6 times [2024-10-11 14:31:09,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:09,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395113386] [2024-10-11 14:31:09,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:09,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:09,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:10,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:10,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:10,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395113386] [2024-10-11 14:31:10,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395113386] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:31:10,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:31:10,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:31:10,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128707544] [2024-10-11 14:31:10,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:10,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:31:10,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:10,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:31:10,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 14:31:10,031 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-10-11 14:31:10,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 94 transitions, 921 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:10,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:10,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-10-11 14:31:10,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:10,212 INFO L124 PetriNetUnfolderBase]: 416/749 cut-off events. [2024-10-11 14:31:10,212 INFO L125 PetriNetUnfolderBase]: For 2955/2967 co-relation queries the response was YES. [2024-10-11 14:31:10,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3213 conditions, 749 events. 416/749 cut-off events. For 2955/2967 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3510 event pairs, 128 based on Foata normal form. 2/743 useless extension candidates. Maximal degree in co-relation 3056. Up to 399 conditions per place. [2024-10-11 14:31:10,219 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 70 selfloop transitions, 27 changer transitions 2/106 dead transitions. [2024-10-11 14:31:10,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 106 transitions, 1160 flow [2024-10-11 14:31:10,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:31:10,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:31:10,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2024-10-11 14:31:10,220 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-10-11 14:31:10,220 INFO L175 Difference]: Start difference. First operand has 80 places, 94 transitions, 921 flow. Second operand 5 states and 60 transitions. [2024-10-11 14:31:10,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 106 transitions, 1160 flow [2024-10-11 14:31:10,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 106 transitions, 1067 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-10-11 14:31:10,228 INFO L231 Difference]: Finished difference. Result has 74 places, 93 transitions, 874 flow [2024-10-11 14:31:10,229 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=874, PETRI_PLACES=74, PETRI_TRANSITIONS=93} [2024-10-11 14:31:10,229 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 48 predicate places. [2024-10-11 14:31:10,229 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 93 transitions, 874 flow [2024-10-11 14:31:10,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:10,229 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:10,230 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:10,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-11 14:31:10,230 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:10,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:10,230 INFO L85 PathProgramCache]: Analyzing trace with hash 201793112, now seen corresponding path program 7 times [2024-10-11 14:31:10,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:10,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166100030] [2024-10-11 14:31:10,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:10,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:10,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:10,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:10,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:10,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166100030] [2024-10-11 14:31:10,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166100030] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:31:10,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:31:10,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 14:31:10,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606420802] [2024-10-11 14:31:10,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:10,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:31:10,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:10,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:31:10,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:31:10,298 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:31:10,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 93 transitions, 874 flow. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:10,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:10,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:31:10,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:10,426 INFO L124 PetriNetUnfolderBase]: 483/821 cut-off events. [2024-10-11 14:31:10,426 INFO L125 PetriNetUnfolderBase]: For 2944/2944 co-relation queries the response was YES. [2024-10-11 14:31:10,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3409 conditions, 821 events. 483/821 cut-off events. For 2944/2944 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3565 event pairs, 145 based on Foata normal form. 9/828 useless extension candidates. Maximal degree in co-relation 2844. Up to 457 conditions per place. [2024-10-11 14:31:10,431 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 81 selfloop transitions, 31 changer transitions 1/114 dead transitions. [2024-10-11 14:31:10,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 114 transitions, 1180 flow [2024-10-11 14:31:10,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:31:10,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:31:10,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 70 transitions. [2024-10-11 14:31:10,432 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2024-10-11 14:31:10,432 INFO L175 Difference]: Start difference. First operand has 74 places, 93 transitions, 874 flow. Second operand 6 states and 70 transitions. [2024-10-11 14:31:10,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 114 transitions, 1180 flow [2024-10-11 14:31:10,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 114 transitions, 1126 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-10-11 14:31:10,436 INFO L231 Difference]: Finished difference. Result has 75 places, 93 transitions, 880 flow [2024-10-11 14:31:10,437 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=880, PETRI_PLACES=75, PETRI_TRANSITIONS=93} [2024-10-11 14:31:10,437 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 49 predicate places. [2024-10-11 14:31:10,437 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 93 transitions, 880 flow [2024-10-11 14:31:10,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:10,437 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:10,438 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:10,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-11 14:31:10,438 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:10,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:10,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1913229141, now seen corresponding path program 1 times [2024-10-11 14:31:10,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:10,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197068588] [2024-10-11 14:31:10,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:10,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:10,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:31:10,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:10,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197068588] [2024-10-11 14:31:10,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197068588] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:31:10,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:31:10,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:31:10,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671312676] [2024-10-11 14:31:10,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:10,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:31:10,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:10,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:31:10,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:31:10,503 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-10-11 14:31:10,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 93 transitions, 880 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:10,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:10,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-10-11 14:31:10,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:10,621 INFO L124 PetriNetUnfolderBase]: 365/717 cut-off events. [2024-10-11 14:31:10,621 INFO L125 PetriNetUnfolderBase]: For 3103/3133 co-relation queries the response was YES. [2024-10-11 14:31:10,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3029 conditions, 717 events. 365/717 cut-off events. For 3103/3133 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3595 event pairs, 162 based on Foata normal form. 25/732 useless extension candidates. Maximal degree in co-relation 2559. Up to 558 conditions per place. [2024-10-11 14:31:10,627 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 66 selfloop transitions, 2 changer transitions 15/109 dead transitions. [2024-10-11 14:31:10,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 109 transitions, 1160 flow [2024-10-11 14:31:10,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:31:10,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:31:10,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2024-10-11 14:31:10,629 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2024-10-11 14:31:10,629 INFO L175 Difference]: Start difference. First operand has 75 places, 93 transitions, 880 flow. Second operand 5 states and 59 transitions. [2024-10-11 14:31:10,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 109 transitions, 1160 flow [2024-10-11 14:31:10,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 109 transitions, 1090 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-10-11 14:31:10,635 INFO L231 Difference]: Finished difference. Result has 77 places, 94 transitions, 841 flow [2024-10-11 14:31:10,636 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=841, PETRI_PLACES=77, PETRI_TRANSITIONS=94} [2024-10-11 14:31:10,637 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 51 predicate places. [2024-10-11 14:31:10,637 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 94 transitions, 841 flow [2024-10-11 14:31:10,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:10,637 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:10,638 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:10,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-11 14:31:10,638 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:10,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:10,639 INFO L85 PathProgramCache]: Analyzing trace with hash -447768941, now seen corresponding path program 1 times [2024-10-11 14:31:10,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:10,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767596002] [2024-10-11 14:31:10,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:10,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:10,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:31:10,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:10,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767596002] [2024-10-11 14:31:10,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767596002] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:31:10,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:31:10,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 14:31:10,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895164878] [2024-10-11 14:31:10,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:10,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:31:10,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:10,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:31:10,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:31:10,745 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-10-11 14:31:10,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 94 transitions, 841 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:10,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:10,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-10-11 14:31:10,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:10,852 INFO L124 PetriNetUnfolderBase]: 363/714 cut-off events. [2024-10-11 14:31:10,852 INFO L125 PetriNetUnfolderBase]: For 2596/2638 co-relation queries the response was YES. [2024-10-11 14:31:10,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2929 conditions, 714 events. 363/714 cut-off events. For 2596/2638 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3571 event pairs, 162 based on Foata normal form. 25/731 useless extension candidates. Maximal degree in co-relation 2897. Up to 559 conditions per place. [2024-10-11 14:31:10,857 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 67 selfloop transitions, 2 changer transitions 11/106 dead transitions. [2024-10-11 14:31:10,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 106 transitions, 1100 flow [2024-10-11 14:31:10,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 14:31:10,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 14:31:10,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 50 transitions. [2024-10-11 14:31:10,858 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-10-11 14:31:10,858 INFO L175 Difference]: Start difference. First operand has 77 places, 94 transitions, 841 flow. Second operand 4 states and 50 transitions. [2024-10-11 14:31:10,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 106 transitions, 1100 flow [2024-10-11 14:31:10,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 106 transitions, 1084 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-10-11 14:31:10,863 INFO L231 Difference]: Finished difference. Result has 77 places, 95 transitions, 845 flow [2024-10-11 14:31:10,863 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=845, PETRI_PLACES=77, PETRI_TRANSITIONS=95} [2024-10-11 14:31:10,864 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 51 predicate places. [2024-10-11 14:31:10,864 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 95 transitions, 845 flow [2024-10-11 14:31:10,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:10,864 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:10,864 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:10,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-11 14:31:10,865 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:10,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:10,865 INFO L85 PathProgramCache]: Analyzing trace with hash -2092765735, now seen corresponding path program 1 times [2024-10-11 14:31:10,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:10,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253473025] [2024-10-11 14:31:10,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:10,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:10,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:31:11,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:11,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253473025] [2024-10-11 14:31:11,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253473025] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:11,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077070860] [2024-10-11 14:31:11,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:11,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:11,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:11,110 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:11,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 14:31:11,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:11,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-11 14:31:11,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:11,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:31:11,274 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:11,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 12 [2024-10-11 14:31:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:31:11,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077070860] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:11,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:11,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2024-10-11 14:31:11,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485791971] [2024-10-11 14:31:11,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:11,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-11 14:31:11,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:11,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-11 14:31:11,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-11 14:31:11,343 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-10-11 14:31:11,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 95 transitions, 845 flow. Second operand has 11 states, 11 states have (on average 8.0) internal successors, (88), 11 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) [2024-10-11 14:31:11,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:11,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-10-11 14:31:11,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:11,608 INFO L124 PetriNetUnfolderBase]: 1072/1996 cut-off events. [2024-10-11 14:31:11,608 INFO L125 PetriNetUnfolderBase]: For 6743/6893 co-relation queries the response was YES. [2024-10-11 14:31:11,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7923 conditions, 1996 events. 1072/1996 cut-off events. For 6743/6893 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 12018 event pairs, 143 based on Foata normal form. 54/2044 useless extension candidates. Maximal degree in co-relation 6496. Up to 521 conditions per place. [2024-10-11 14:31:11,619 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 225 selfloop transitions, 14 changer transitions 4/269 dead transitions. [2024-10-11 14:31:11,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 269 transitions, 2858 flow [2024-10-11 14:31:11,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:31:11,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:31:11,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2024-10-11 14:31:11,621 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5341880341880342 [2024-10-11 14:31:11,621 INFO L175 Difference]: Start difference. First operand has 77 places, 95 transitions, 845 flow. Second operand 9 states and 125 transitions. [2024-10-11 14:31:11,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 269 transitions, 2858 flow [2024-10-11 14:31:11,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 269 transitions, 2842 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-10-11 14:31:11,633 INFO L231 Difference]: Finished difference. Result has 86 places, 108 transitions, 954 flow [2024-10-11 14:31:11,633 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=837, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=954, PETRI_PLACES=86, PETRI_TRANSITIONS=108} [2024-10-11 14:31:11,633 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 60 predicate places. [2024-10-11 14:31:11,634 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 108 transitions, 954 flow [2024-10-11 14:31:11,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.0) internal successors, (88), 11 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) [2024-10-11 14:31:11,634 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:11,634 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:11,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-11 14:31:11,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-11 14:31:11,835 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:11,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:11,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1625193775, now seen corresponding path program 2 times [2024-10-11 14:31:11,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:11,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754369532] [2024-10-11 14:31:11,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:11,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:12,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:31:12,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:12,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754369532] [2024-10-11 14:31:12,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754369532] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:12,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167279813] [2024-10-11 14:31:12,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:31:12,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:12,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:12,003 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:12,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 14:31:12,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:31:12,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:31:12,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-11 14:31:12,078 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:12,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:31:12,120 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:12,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 12 [2024-10-11 14:31:12,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:31:12,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167279813] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:12,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:12,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2024-10-11 14:31:12,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199485959] [2024-10-11 14:31:12,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:12,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-11 14:31:12,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:12,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-11 14:31:12,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-11 14:31:12,178 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-10-11 14:31:12,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 108 transitions, 954 flow. Second operand has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:12,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:12,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-10-11 14:31:12,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:12,807 INFO L124 PetriNetUnfolderBase]: 2651/4950 cut-off events. [2024-10-11 14:31:12,807 INFO L125 PetriNetUnfolderBase]: For 18161/18453 co-relation queries the response was YES. [2024-10-11 14:31:12,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20662 conditions, 4950 events. 2651/4950 cut-off events. For 18161/18453 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 35324 event pairs, 405 based on Foata normal form. 167/5109 useless extension candidates. Maximal degree in co-relation 15779. Up to 1606 conditions per place. [2024-10-11 14:31:12,832 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 224 selfloop transitions, 23 changer transitions 18/291 dead transitions. [2024-10-11 14:31:12,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 291 transitions, 3114 flow [2024-10-11 14:31:12,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 14:31:12,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 14:31:12,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2024-10-11 14:31:12,833 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5480769230769231 [2024-10-11 14:31:12,833 INFO L175 Difference]: Start difference. First operand has 86 places, 108 transitions, 954 flow. Second operand 8 states and 114 transitions. [2024-10-11 14:31:12,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 291 transitions, 3114 flow [2024-10-11 14:31:12,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 291 transitions, 3066 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-10-11 14:31:12,863 INFO L231 Difference]: Finished difference. Result has 97 places, 126 transitions, 1142 flow [2024-10-11 14:31:12,864 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1142, PETRI_PLACES=97, PETRI_TRANSITIONS=126} [2024-10-11 14:31:12,864 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 71 predicate places. [2024-10-11 14:31:12,864 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 126 transitions, 1142 flow [2024-10-11 14:31:12,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:12,865 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:12,865 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:12,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 14:31:13,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:13,068 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:13,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:13,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1808361791, now seen corresponding path program 3 times [2024-10-11 14:31:13,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:13,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720681527] [2024-10-11 14:31:13,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:13,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:13,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:31:13,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:13,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720681527] [2024-10-11 14:31:13,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720681527] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:13,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317366270] [2024-10-11 14:31:13,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:31:13,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:13,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:13,170 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:13,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 14:31:13,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-11 14:31:13,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:31:13,243 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 14:31:13,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:13,309 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:31:13,310 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:31:13,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317366270] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:13,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:13,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-11 14:31:13,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364228978] [2024-10-11 14:31:13,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:13,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 14:31:13,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:13,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 14:31:13,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-10-11 14:31:13,371 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:31:13,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 126 transitions, 1142 flow. Second operand has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 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) [2024-10-11 14:31:13,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:13,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:31:13,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:14,560 INFO L124 PetriNetUnfolderBase]: 4834/8047 cut-off events. [2024-10-11 14:31:14,561 INFO L125 PetriNetUnfolderBase]: For 23630/23630 co-relation queries the response was YES. [2024-10-11 14:31:14,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33461 conditions, 8047 events. 4834/8047 cut-off events. For 23630/23630 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 52076 event pairs, 183 based on Foata normal form. 240/8287 useless extension candidates. Maximal degree in co-relation 28087. Up to 1475 conditions per place. [2024-10-11 14:31:14,598 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 373 selfloop transitions, 123 changer transitions 8/505 dead transitions. [2024-10-11 14:31:14,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 505 transitions, 4865 flow [2024-10-11 14:31:14,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-11 14:31:14,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-10-11 14:31:14,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 287 transitions. [2024-10-11 14:31:14,601 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3806366047745358 [2024-10-11 14:31:14,601 INFO L175 Difference]: Start difference. First operand has 97 places, 126 transitions, 1142 flow. Second operand 29 states and 287 transitions. [2024-10-11 14:31:14,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 505 transitions, 4865 flow [2024-10-11 14:31:14,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 505 transitions, 4814 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-10-11 14:31:14,649 INFO L231 Difference]: Finished difference. Result has 144 places, 204 transitions, 2209 flow [2024-10-11 14:31:14,649 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1127, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2209, PETRI_PLACES=144, PETRI_TRANSITIONS=204} [2024-10-11 14:31:14,650 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 118 predicate places. [2024-10-11 14:31:14,650 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 204 transitions, 2209 flow [2024-10-11 14:31:14,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 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) [2024-10-11 14:31:14,650 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:14,650 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:14,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 14:31:14,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:14,851 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:14,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:14,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1935508487, now seen corresponding path program 4 times [2024-10-11 14:31:14,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:14,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358470959] [2024-10-11 14:31:14,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:14,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:14,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:31:14,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:14,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358470959] [2024-10-11 14:31:14,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358470959] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:14,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932555042] [2024-10-11 14:31:14,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:31:14,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:14,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:14,999 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:15,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 14:31:15,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:31:15,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:31:15,081 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 14:31:15,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:15,156 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:31:15,156 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:15,217 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:31:15,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932555042] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:15,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:15,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-10-11 14:31:15,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081078161] [2024-10-11 14:31:15,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:15,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-11 14:31:15,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:15,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-11 14:31:15,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-10-11 14:31:15,222 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:31:15,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 204 transitions, 2209 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:15,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:15,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:31:15,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:17,060 INFO L124 PetriNetUnfolderBase]: 6736/11196 cut-off events. [2024-10-11 14:31:17,060 INFO L125 PetriNetUnfolderBase]: For 73665/73665 co-relation queries the response was YES. [2024-10-11 14:31:17,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58582 conditions, 11196 events. 6736/11196 cut-off events. For 73665/73665 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 75443 event pairs, 336 based on Foata normal form. 81/11277 useless extension candidates. Maximal degree in co-relation 56948. Up to 2360 conditions per place. [2024-10-11 14:31:17,142 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 270 selfloop transitions, 178 changer transitions 9/458 dead transitions. [2024-10-11 14:31:17,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 458 transitions, 5315 flow [2024-10-11 14:31:17,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-11 14:31:17,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-11 14:31:17,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 152 transitions. [2024-10-11 14:31:17,143 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38974358974358975 [2024-10-11 14:31:17,143 INFO L175 Difference]: Start difference. First operand has 144 places, 204 transitions, 2209 flow. Second operand 15 states and 152 transitions. [2024-10-11 14:31:17,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 458 transitions, 5315 flow [2024-10-11 14:31:17,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 458 transitions, 5035 flow, removed 125 selfloop flow, removed 4 redundant places. [2024-10-11 14:31:17,563 INFO L231 Difference]: Finished difference. Result has 161 places, 284 transitions, 3400 flow [2024-10-11 14:31:17,563 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=2055, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3400, PETRI_PLACES=161, PETRI_TRANSITIONS=284} [2024-10-11 14:31:17,564 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 135 predicate places. [2024-10-11 14:31:17,564 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 284 transitions, 3400 flow [2024-10-11 14:31:17,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:17,564 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:17,564 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:17,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-11 14:31:17,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:17,765 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:17,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:17,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1473023666, now seen corresponding path program 5 times [2024-10-11 14:31:17,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:17,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123179702] [2024-10-11 14:31:17,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:17,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:17,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:17,866 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:31:17,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:17,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123179702] [2024-10-11 14:31:17,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123179702] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:17,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482973374] [2024-10-11 14:31:17,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:31:17,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:17,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:17,872 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:17,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 14:31:18,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-11 14:31:18,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:31:18,057 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 14:31:18,059 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:31:18,101 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:31:18,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482973374] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:18,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:18,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-10-11 14:31:18,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458832994] [2024-10-11 14:31:18,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:18,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-11 14:31:18,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:18,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-11 14:31:18,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-10-11 14:31:18,135 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:31:18,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 284 transitions, 3400 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:18,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:18,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:31:18,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:20,199 INFO L124 PetriNetUnfolderBase]: 7479/12457 cut-off events. [2024-10-11 14:31:20,199 INFO L125 PetriNetUnfolderBase]: For 111224/111224 co-relation queries the response was YES. [2024-10-11 14:31:20,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70728 conditions, 12457 events. 7479/12457 cut-off events. For 111224/111224 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 85664 event pairs, 1940 based on Foata normal form. 9/12466 useless extension candidates. Maximal degree in co-relation 68873. Up to 7773 conditions per place. [2024-10-11 14:31:20,316 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 335 selfloop transitions, 45 changer transitions 17/398 dead transitions. [2024-10-11 14:31:20,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 398 transitions, 5262 flow [2024-10-11 14:31:20,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:31:20,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:31:20,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2024-10-11 14:31:20,317 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4725274725274725 [2024-10-11 14:31:20,317 INFO L175 Difference]: Start difference. First operand has 161 places, 284 transitions, 3400 flow. Second operand 7 states and 86 transitions. [2024-10-11 14:31:20,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 398 transitions, 5262 flow [2024-10-11 14:31:21,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 398 transitions, 5160 flow, removed 51 selfloop flow, removed 0 redundant places. [2024-10-11 14:31:21,164 INFO L231 Difference]: Finished difference. Result has 170 places, 293 transitions, 3531 flow [2024-10-11 14:31:21,164 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=3306, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3531, PETRI_PLACES=170, PETRI_TRANSITIONS=293} [2024-10-11 14:31:21,168 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 144 predicate places. [2024-10-11 14:31:21,168 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 293 transitions, 3531 flow [2024-10-11 14:31:21,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:21,169 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:21,169 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:21,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 14:31:21,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-10-11 14:31:21,370 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:21,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:21,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1388022526, now seen corresponding path program 6 times [2024-10-11 14:31:21,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:21,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535995507] [2024-10-11 14:31:21,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:21,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:21,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:31:21,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:21,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535995507] [2024-10-11 14:31:21,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535995507] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:21,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277793358] [2024-10-11 14:31:21,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:31:21,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:21,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:21,581 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:21,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 14:31:21,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-11 14:31:21,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:31:21,670 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 14:31:21,674 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:21,727 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:31:21,727 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:21,763 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:31:21,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277793358] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:21,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:21,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-10-11 14:31:21,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083677011] [2024-10-11 14:31:21,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:21,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 14:31:21,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:21,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 14:31:21,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-10-11 14:31:21,766 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:31:21,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 293 transitions, 3531 flow. Second operand has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:21,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:21,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:31:21,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:24,544 INFO L124 PetriNetUnfolderBase]: 9297/15237 cut-off events. [2024-10-11 14:31:24,545 INFO L125 PetriNetUnfolderBase]: For 140757/140757 co-relation queries the response was YES. [2024-10-11 14:31:24,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87972 conditions, 15237 events. 9297/15237 cut-off events. For 140757/140757 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 105516 event pairs, 1198 based on Foata normal form. 166/15403 useless extension candidates. Maximal degree in co-relation 87256. Up to 5286 conditions per place. [2024-10-11 14:31:24,672 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 490 selfloop transitions, 166 changer transitions 3/660 dead transitions. [2024-10-11 14:31:24,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 660 transitions, 8193 flow [2024-10-11 14:31:24,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-11 14:31:24,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-11 14:31:24,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 230 transitions. [2024-10-11 14:31:24,677 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4020979020979021 [2024-10-11 14:31:24,677 INFO L175 Difference]: Start difference. First operand has 170 places, 293 transitions, 3531 flow. Second operand 22 states and 230 transitions. [2024-10-11 14:31:24,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 660 transitions, 8193 flow [2024-10-11 14:31:25,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 660 transitions, 8098 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-10-11 14:31:25,800 INFO L231 Difference]: Finished difference. Result has 196 places, 366 transitions, 5156 flow [2024-10-11 14:31:25,800 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=3461, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5156, PETRI_PLACES=196, PETRI_TRANSITIONS=366} [2024-10-11 14:31:25,801 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 170 predicate places. [2024-10-11 14:31:25,801 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 366 transitions, 5156 flow [2024-10-11 14:31:25,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:25,801 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:25,801 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:25,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-11 14:31:26,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:26,003 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:26,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:26,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1312729564, now seen corresponding path program 7 times [2024-10-11 14:31:26,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:26,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838616400] [2024-10-11 14:31:26,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:26,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:26,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:26,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:31:26,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:26,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838616400] [2024-10-11 14:31:26,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838616400] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:26,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243813626] [2024-10-11 14:31:26,086 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 14:31:26,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:26,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:26,087 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:26,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 14:31:26,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:26,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 14:31:26,170 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:26,213 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:31:26,214 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:26,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:31:26,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243813626] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:26,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:26,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-10-11 14:31:26,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278137592] [2024-10-11 14:31:26,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:26,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 14:31:26,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:26,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 14:31:26,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-10-11 14:31:26,257 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:31:26,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 366 transitions, 5156 flow. Second operand has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:26,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:26,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:31:26,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:28,953 INFO L124 PetriNetUnfolderBase]: 9369/15390 cut-off events. [2024-10-11 14:31:28,953 INFO L125 PetriNetUnfolderBase]: For 182273/182273 co-relation queries the response was YES. [2024-10-11 14:31:29,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97996 conditions, 15390 events. 9369/15390 cut-off events. For 182273/182273 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 107153 event pairs, 2488 based on Foata normal form. 30/15420 useless extension candidates. Maximal degree in co-relation 97230. Up to 10466 conditions per place. [2024-10-11 14:31:29,072 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 423 selfloop transitions, 77 changer transitions 16/517 dead transitions. [2024-10-11 14:31:29,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 517 transitions, 7425 flow [2024-10-11 14:31:29,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 14:31:29,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-11 14:31:29,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-10-11 14:31:29,074 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43006993006993005 [2024-10-11 14:31:29,074 INFO L175 Difference]: Start difference. First operand has 196 places, 366 transitions, 5156 flow. Second operand 11 states and 123 transitions. [2024-10-11 14:31:29,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 517 transitions, 7425 flow [2024-10-11 14:31:31,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 517 transitions, 6779 flow, removed 230 selfloop flow, removed 7 redundant places. [2024-10-11 14:31:31,459 INFO L231 Difference]: Finished difference. Result has 202 places, 360 transitions, 4605 flow [2024-10-11 14:31:31,459 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4512, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4605, PETRI_PLACES=202, PETRI_TRANSITIONS=360} [2024-10-11 14:31:31,459 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 176 predicate places. [2024-10-11 14:31:31,460 INFO L471 AbstractCegarLoop]: Abstraction has has 202 places, 360 transitions, 4605 flow [2024-10-11 14:31:31,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:31,460 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:31,460 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:31,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-11 14:31:31,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-10-11 14:31:31,661 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:31,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:31,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1629265695, now seen corresponding path program 8 times [2024-10-11 14:31:31,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:31,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926201017] [2024-10-11 14:31:31,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:31,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:31,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:31:31,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:31,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926201017] [2024-10-11 14:31:31,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926201017] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:31,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379372747] [2024-10-11 14:31:31,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:31:31,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:31,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:31,784 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:31,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 14:31:31,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:31:31,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:31:31,940 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 14:31:31,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:31,996 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:31:31,996 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:31:32,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379372747] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:32,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:32,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-10-11 14:31:32,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961652341] [2024-10-11 14:31:32,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:32,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 14:31:32,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:32,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 14:31:32,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-10-11 14:31:32,053 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:31:32,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 360 transitions, 4605 flow. Second operand has 13 states, 13 states have (on average 6.846153846153846) internal successors, (89), 13 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) [2024-10-11 14:31:32,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:32,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:31:32,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:35,281 INFO L124 PetriNetUnfolderBase]: 11627/19115 cut-off events. [2024-10-11 14:31:35,281 INFO L125 PetriNetUnfolderBase]: For 174211/174211 co-relation queries the response was YES. [2024-10-11 14:31:35,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111290 conditions, 19115 events. 11627/19115 cut-off events. For 174211/174211 co-relation queries the response was YES. Maximal size of possible extension queue 709. Compared 136677 event pairs, 502 based on Foata normal form. 226/19341 useless extension candidates. Maximal degree in co-relation 110546. Up to 5896 conditions per place. [2024-10-11 14:31:35,440 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 362 selfloop transitions, 275 changer transitions 6/644 dead transitions. [2024-10-11 14:31:35,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 644 transitions, 8532 flow [2024-10-11 14:31:35,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-11 14:31:35,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-11 14:31:35,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 168 transitions. [2024-10-11 14:31:35,441 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40384615384615385 [2024-10-11 14:31:35,441 INFO L175 Difference]: Start difference. First operand has 202 places, 360 transitions, 4605 flow. Second operand 16 states and 168 transitions. [2024-10-11 14:31:35,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 644 transitions, 8532 flow [2024-10-11 14:31:37,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 644 transitions, 8247 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-10-11 14:31:37,311 INFO L231 Difference]: Finished difference. Result has 219 places, 444 transitions, 6397 flow [2024-10-11 14:31:37,311 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4358, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6397, PETRI_PLACES=219, PETRI_TRANSITIONS=444} [2024-10-11 14:31:37,312 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 193 predicate places. [2024-10-11 14:31:37,312 INFO L471 AbstractCegarLoop]: Abstraction has has 219 places, 444 transitions, 6397 flow [2024-10-11 14:31:37,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.846153846153846) internal successors, (89), 13 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) [2024-10-11 14:31:37,312 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:37,312 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:37,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-11 14:31:37,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:37,516 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:37,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:37,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1085553406, now seen corresponding path program 9 times [2024-10-11 14:31:37,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:37,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639899904] [2024-10-11 14:31:37,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:37,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:37,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:31:37,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:37,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639899904] [2024-10-11 14:31:37,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639899904] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:37,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820692936] [2024-10-11 14:31:37,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:31:37,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:37,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:37,585 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:37,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 14:31:37,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 14:31:37,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:31:37,665 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 14:31:37,665 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:37,710 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:31:37,710 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:37,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:31:37,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820692936] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:37,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:37,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-10-11 14:31:37,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889248001] [2024-10-11 14:31:37,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:37,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 14:31:37,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:37,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 14:31:37,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-10-11 14:31:37,742 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:31:37,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 444 transitions, 6397 flow. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:37,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:37,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:31:37,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:41,381 INFO L124 PetriNetUnfolderBase]: 11599/19072 cut-off events. [2024-10-11 14:31:41,382 INFO L125 PetriNetUnfolderBase]: For 241007/241007 co-relation queries the response was YES. [2024-10-11 14:31:41,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123859 conditions, 19072 events. 11599/19072 cut-off events. For 241007/241007 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 136699 event pairs, 2905 based on Foata normal form. 51/19123 useless extension candidates. Maximal degree in co-relation 123095. Up to 11654 conditions per place. [2024-10-11 14:31:41,526 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 525 selfloop transitions, 107 changer transitions 4/637 dead transitions. [2024-10-11 14:31:41,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 637 transitions, 9331 flow [2024-10-11 14:31:41,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 14:31:41,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 14:31:41,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2024-10-11 14:31:41,528 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4391025641025641 [2024-10-11 14:31:41,528 INFO L175 Difference]: Start difference. First operand has 219 places, 444 transitions, 6397 flow. Second operand 12 states and 137 transitions. [2024-10-11 14:31:41,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 637 transitions, 9331 flow [2024-10-11 14:31:44,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 637 transitions, 9188 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-10-11 14:31:44,641 INFO L231 Difference]: Finished difference. Result has 223 places, 440 transitions, 6446 flow [2024-10-11 14:31:44,642 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6221, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6446, PETRI_PLACES=223, PETRI_TRANSITIONS=440} [2024-10-11 14:31:44,642 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 197 predicate places. [2024-10-11 14:31:44,642 INFO L471 AbstractCegarLoop]: Abstraction has has 223 places, 440 transitions, 6446 flow [2024-10-11 14:31:44,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:44,642 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:44,642 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:44,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-11 14:31:44,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-10-11 14:31:44,843 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:44,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:44,844 INFO L85 PathProgramCache]: Analyzing trace with hash 49892430, now seen corresponding path program 10 times [2024-10-11 14:31:44,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:44,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278276446] [2024-10-11 14:31:44,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:44,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:44,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:44,921 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:31:44,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:44,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278276446] [2024-10-11 14:31:44,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278276446] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:44,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633310043] [2024-10-11 14:31:44,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:31:44,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:44,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:44,924 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:44,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 14:31:44,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:31:44,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:31:45,000 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 14:31:45,001 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:45,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:31:45,052 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:45,080 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 14:31:45,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633310043] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:45,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:45,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-10-11 14:31:45,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506121615] [2024-10-11 14:31:45,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:45,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 14:31:45,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:45,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 14:31:45,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-10-11 14:31:45,083 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:31:45,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 440 transitions, 6446 flow. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:45,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:45,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:31:45,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:49,266 INFO L124 PetriNetUnfolderBase]: 12893/21080 cut-off events. [2024-10-11 14:31:49,266 INFO L125 PetriNetUnfolderBase]: For 288914/288914 co-relation queries the response was YES. [2024-10-11 14:31:49,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140470 conditions, 21080 events. 12893/21080 cut-off events. For 288914/288914 co-relation queries the response was YES. Maximal size of possible extension queue 763. Compared 151572 event pairs, 1397 based on Foata normal form. 66/21146 useless extension candidates. Maximal degree in co-relation 139701. Up to 13052 conditions per place. [2024-10-11 14:31:49,458 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 564 selfloop transitions, 122 changer transitions 10/697 dead transitions. [2024-10-11 14:31:49,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 697 transitions, 10275 flow [2024-10-11 14:31:49,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-11 14:31:49,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-11 14:31:49,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 160 transitions. [2024-10-11 14:31:49,460 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43956043956043955 [2024-10-11 14:31:49,461 INFO L175 Difference]: Start difference. First operand has 223 places, 440 transitions, 6446 flow. Second operand 14 states and 160 transitions. [2024-10-11 14:31:49,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 697 transitions, 10275 flow [2024-10-11 14:31:54,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 697 transitions, 9994 flow, removed 27 selfloop flow, removed 10 redundant places. [2024-10-11 14:31:54,155 INFO L231 Difference]: Finished difference. Result has 230 places, 468 transitions, 7043 flow [2024-10-11 14:31:54,155 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6189, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7043, PETRI_PLACES=230, PETRI_TRANSITIONS=468} [2024-10-11 14:31:54,155 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 204 predicate places. [2024-10-11 14:31:54,155 INFO L471 AbstractCegarLoop]: Abstraction has has 230 places, 468 transitions, 7043 flow [2024-10-11 14:31:54,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:54,156 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:54,156 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:54,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-11 14:31:54,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-10-11 14:31:54,359 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:31:54,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:54,364 INFO L85 PathProgramCache]: Analyzing trace with hash -213240680, now seen corresponding path program 11 times [2024-10-11 14:31:54,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:54,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691592035] [2024-10-11 14:31:54,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:54,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:54,433 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:31:54,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:54,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691592035] [2024-10-11 14:31:54,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691592035] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:31:54,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581300005] [2024-10-11 14:31:54,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:31:54,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:31:54,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:54,437 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:31:54,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-11 14:31:54,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-11 14:31:54,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:31:54,519 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 14:31:54,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:31:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:31:54,570 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:31:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 14:31:54,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581300005] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:31:54,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:31:54,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-10-11 14:31:54,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157944186] [2024-10-11 14:31:54,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:31:54,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 14:31:54,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:54,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 14:31:54,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-10-11 14:31:54,607 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:31:54,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 468 transitions, 7043 flow. Second operand has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:54,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:54,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:31:54,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:58,287 INFO L124 PetriNetUnfolderBase]: 13075/21372 cut-off events. [2024-10-11 14:31:58,288 INFO L125 PetriNetUnfolderBase]: For 297415/297415 co-relation queries the response was YES. [2024-10-11 14:31:58,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143852 conditions, 21372 events. 13075/21372 cut-off events. For 297415/297415 co-relation queries the response was YES. Maximal size of possible extension queue 780. Compared 154227 event pairs, 545 based on Foata normal form. 116/21488 useless extension candidates. Maximal degree in co-relation 143084. Up to 6612 conditions per place. [2024-10-11 14:31:58,482 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 570 selfloop transitions, 246 changer transitions 4/821 dead transitions. [2024-10-11 14:31:58,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 821 transitions, 11918 flow [2024-10-11 14:31:58,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-11 14:31:58,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-10-11 14:31:58,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 254 transitions. [2024-10-11 14:31:58,486 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3757396449704142 [2024-10-11 14:31:58,486 INFO L175 Difference]: Start difference. First operand has 230 places, 468 transitions, 7043 flow. Second operand 26 states and 254 transitions. [2024-10-11 14:31:58,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 821 transitions, 11918 flow [2024-10-11 14:32:03,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 821 transitions, 11655 flow, removed 127 selfloop flow, removed 1 redundant places. [2024-10-11 14:32:03,248 INFO L231 Difference]: Finished difference. Result has 264 places, 501 transitions, 7950 flow [2024-10-11 14:32:03,249 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6782, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7950, PETRI_PLACES=264, PETRI_TRANSITIONS=501} [2024-10-11 14:32:03,249 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 238 predicate places. [2024-10-11 14:32:03,249 INFO L471 AbstractCegarLoop]: Abstraction has has 264 places, 501 transitions, 7950 flow [2024-10-11 14:32:03,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:03,251 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:03,251 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:03,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-11 14:32:03,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-11 14:32:03,453 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:32:03,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:03,453 INFO L85 PathProgramCache]: Analyzing trace with hash 543451522, now seen corresponding path program 12 times [2024-10-11 14:32:03,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:03,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429771270] [2024-10-11 14:32:03,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:03,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:03,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:32:03,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:03,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429771270] [2024-10-11 14:32:03,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429771270] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:32:03,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906549101] [2024-10-11 14:32:03,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:32:03,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:32:03,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:32:03,582 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:32:03,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-11 14:32:03,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-11 14:32:03,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:32:03,664 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 14:32:03,665 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:32:03,720 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:32:03,720 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:32:03,759 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:32:03,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906549101] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:32:03,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:32:03,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-11 14:32:03,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183987328] [2024-10-11 14:32:03,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:32:03,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 14:32:03,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:03,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 14:32:03,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-10-11 14:32:03,765 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:32:03,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 501 transitions, 7950 flow. Second operand has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 15 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) [2024-10-11 14:32:03,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:03,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:32:03,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:09,270 INFO L124 PetriNetUnfolderBase]: 15105/24590 cut-off events. [2024-10-11 14:32:09,271 INFO L125 PetriNetUnfolderBase]: For 343365/343365 co-relation queries the response was YES. [2024-10-11 14:32:09,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172409 conditions, 24590 events. 15105/24590 cut-off events. For 343365/343365 co-relation queries the response was YES. Maximal size of possible extension queue 943. Compared 180150 event pairs, 670 based on Foata normal form. 92/24682 useless extension candidates. Maximal degree in co-relation 171601. Up to 7718 conditions per place. [2024-10-11 14:32:09,538 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 592 selfloop transitions, 297 changer transitions 8/898 dead transitions. [2024-10-11 14:32:09,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 898 transitions, 13804 flow [2024-10-11 14:32:09,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-11 14:32:09,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-10-11 14:32:09,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 275 transitions. [2024-10-11 14:32:09,539 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3647214854111406 [2024-10-11 14:32:09,539 INFO L175 Difference]: Start difference. First operand has 264 places, 501 transitions, 7950 flow. Second operand 29 states and 275 transitions. [2024-10-11 14:32:09,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 898 transitions, 13804 flow [2024-10-11 14:32:15,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 898 transitions, 13341 flow, removed 128 selfloop flow, removed 10 redundant places. [2024-10-11 14:32:15,011 INFO L231 Difference]: Finished difference. Result has 291 places, 571 transitions, 9582 flow [2024-10-11 14:32:15,011 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=7664, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=9582, PETRI_PLACES=291, PETRI_TRANSITIONS=571} [2024-10-11 14:32:15,012 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 265 predicate places. [2024-10-11 14:32:15,012 INFO L471 AbstractCegarLoop]: Abstraction has has 291 places, 571 transitions, 9582 flow [2024-10-11 14:32:15,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 15 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) [2024-10-11 14:32:15,012 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:15,012 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:15,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-11 14:32:15,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-11 14:32:15,213 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:32:15,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:15,213 INFO L85 PathProgramCache]: Analyzing trace with hash -618134438, now seen corresponding path program 13 times [2024-10-11 14:32:15,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:15,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667837331] [2024-10-11 14:32:15,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:15,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:15,278 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:32:15,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:15,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667837331] [2024-10-11 14:32:15,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667837331] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:32:15,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099732360] [2024-10-11 14:32:15,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 14:32:15,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:32:15,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:32:15,281 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:32:15,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-11 14:32:15,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:15,367 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 14:32:15,368 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:32:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:32:15,419 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:32:15,450 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:32:15,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099732360] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:32:15,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:32:15,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-11 14:32:15,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702806252] [2024-10-11 14:32:15,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:32:15,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 14:32:15,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:15,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 14:32:15,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-10-11 14:32:15,459 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-11 14:32:15,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 571 transitions, 9582 flow. Second operand has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 15 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) [2024-10-11 14:32:15,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:15,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-11 14:32:15,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand