./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/chl-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 14:35:47,481 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 14:35:47,570 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 14:35:47,577 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 14:35:47,578 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 14:35:47,607 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 14:35:47,610 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 14:35:47,610 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 14:35:47,611 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 14:35:47,612 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 14:35:47,612 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 14:35:47,613 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 14:35:47,613 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 14:35:47,614 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 14:35:47,615 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 14:35:47,616 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 14:35:47,616 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 14:35:47,617 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 14:35:47,617 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 14:35:47,617 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 14:35:47,617 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 14:35:47,621 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 14:35:47,621 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 14:35:47,622 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 14:35:47,622 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 14:35:47,622 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 14:35:47,622 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 14:35:47,623 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 14:35:47,623 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 14:35:47,623 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 14:35:47,624 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 14:35:47,624 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 14:35:47,636 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:35:47,636 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 14:35:47,636 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 14:35:47,637 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 14:35:47,637 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 14:35:47,637 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 14:35:47,637 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 14:35:47,637 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 14:35:47,638 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 14:35:47,639 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 14:35:47,639 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e [2024-10-14 14:35:47,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 14:35:47,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 14:35:47,930 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 14:35:47,931 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 14:35:47,931 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 14:35:47,933 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2024-10-14 14:35:49,453 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 14:35:49,650 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 14:35:49,651 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2024-10-14 14:35:49,658 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c7bff0de/9d13125fc1d5473d92f708518531e605/FLAGd1ce19c54 [2024-10-14 14:35:49,670 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c7bff0de/9d13125fc1d5473d92f708518531e605 [2024-10-14 14:35:49,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 14:35:49,674 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 14:35:49,675 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 14:35:49,675 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 14:35:49,681 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 14:35:49,682 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:35:49" (1/1) ... [2024-10-14 14:35:49,683 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@280e4389 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:35:49, skipping insertion in model container [2024-10-14 14:35:49,683 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:35:49" (1/1) ... [2024-10-14 14:35:49,707 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 14:35:49,882 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/chl-word-symm.wvr.c[2874,2887] [2024-10-14 14:35:49,892 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:35:49,903 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 14:35:49,941 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/chl-word-symm.wvr.c[2874,2887] [2024-10-14 14:35:49,944 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:35:49,973 INFO L204 MainTranslator]: Completed translation [2024-10-14 14:35:49,973 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:35:49 WrapperNode [2024-10-14 14:35:49,974 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 14:35:49,975 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 14:35:49,976 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 14:35:49,976 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 14:35:49,982 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:35:49" (1/1) ... [2024-10-14 14:35:49,992 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:35:49" (1/1) ... [2024-10-14 14:35:50,026 INFO L138 Inliner]: procedures = 23, calls = 25, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 123 [2024-10-14 14:35:50,030 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 14:35:50,031 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 14:35:50,031 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 14:35:50,031 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 14:35:50,046 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:35:49" (1/1) ... [2024-10-14 14:35:50,050 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:35:49" (1/1) ... [2024-10-14 14:35:50,053 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:35:49" (1/1) ... [2024-10-14 14:35:50,075 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 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]. [2024-10-14 14:35:50,075 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:35:49" (1/1) ... [2024-10-14 14:35:50,076 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:35:49" (1/1) ... [2024-10-14 14:35:50,085 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:35:49" (1/1) ... [2024-10-14 14:35:50,093 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:35:49" (1/1) ... [2024-10-14 14:35:50,094 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:35:49" (1/1) ... [2024-10-14 14:35:50,095 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:35:49" (1/1) ... [2024-10-14 14:35:50,101 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 14:35:50,104 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 14:35:50,105 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 14:35:50,105 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 14:35:50,106 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:35:49" (1/1) ... [2024-10-14 14:35:50,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:35:50,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:35:50,143 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 14:35:50,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 14:35:50,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 14:35:50,194 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-14 14:35:50,195 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-14 14:35:50,195 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-14 14:35:50,195 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-14 14:35:50,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 14:35:50,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 14:35:50,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 14:35:50,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 14:35:50,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 14:35:50,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 14:35:50,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 14:35:50,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 14:35:50,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 14:35:50,199 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-14 14:35:50,310 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 14:35:50,312 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 14:35:50,611 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 14:35:50,611 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 14:35:50,908 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 14:35:50,912 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-14 14:35:50,912 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:35:50 BoogieIcfgContainer [2024-10-14 14:35:50,913 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 14:35:50,918 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 14:35:50,918 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 14:35:50,925 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 14:35:50,926 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 02:35:49" (1/3) ... [2024-10-14 14:35:50,927 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fc55806 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:35:50, skipping insertion in model container [2024-10-14 14:35:50,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:35:49" (2/3) ... [2024-10-14 14:35:50,933 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fc55806 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:35:50, skipping insertion in model container [2024-10-14 14:35:50,933 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:35:50" (3/3) ... [2024-10-14 14:35:50,934 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2024-10-14 14:35:50,970 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 14:35:50,970 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 14:35:50,971 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 14:35:51,026 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-14 14:35:51,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 34 transitions, 82 flow [2024-10-14 14:35:51,096 INFO L124 PetriNetUnfolderBase]: 8/32 cut-off events. [2024-10-14 14:35:51,097 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 14:35:51,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 32 events. 8/32 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 44 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-10-14 14:35:51,100 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 34 transitions, 82 flow [2024-10-14 14:35:51,104 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 31 transitions, 74 flow [2024-10-14 14:35:51,119 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 14:35:51,127 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;@5e04df8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 14:35:51,127 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-14 14:35:51,140 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 14:35:51,142 INFO L124 PetriNetUnfolderBase]: 8/30 cut-off events. [2024-10-14 14:35:51,142 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 14:35:51,142 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:35:51,143 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:35:51,144 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:35:51,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:35:51,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1992990212, now seen corresponding path program 1 times [2024-10-14 14:35:51,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:35:51,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839933747] [2024-10-14 14:35:51,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:51,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:35:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:35:51,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:35:51,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:35:51,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839933747] [2024-10-14 14:35:51,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839933747] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:35:51,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:35:51,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 14:35:51,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190387831] [2024-10-14 14:35:51,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:35:51,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 14:35:51,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:35:51,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 14:35:51,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 14:35:51,837 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:35:51,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 31 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:51,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:35:51,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:35:51,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:35:52,132 INFO L124 PetriNetUnfolderBase]: 271/440 cut-off events. [2024-10-14 14:35:52,133 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-10-14 14:35:52,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 912 conditions, 440 events. 271/440 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1484 event pairs, 138 based on Foata normal form. 1/338 useless extension candidates. Maximal degree in co-relation 824. Up to 343 conditions per place. [2024-10-14 14:35:52,142 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 40 selfloop transitions, 1 changer transitions 7/49 dead transitions. [2024-10-14 14:35:52,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 49 transitions, 218 flow [2024-10-14 14:35:52,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 14:35:52,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 14:35:52,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2024-10-14 14:35:52,155 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45588235294117646 [2024-10-14 14:35:52,157 INFO L175 Difference]: Start difference. First operand has 30 places, 31 transitions, 74 flow. Second operand 4 states and 62 transitions. [2024-10-14 14:35:52,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 49 transitions, 218 flow [2024-10-14 14:35:52,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 49 transitions, 202 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-14 14:35:52,166 INFO L231 Difference]: Finished difference. Result has 31 places, 31 transitions, 75 flow [2024-10-14 14:35:52,167 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=75, PETRI_PLACES=31, PETRI_TRANSITIONS=31} [2024-10-14 14:35:52,171 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-10-14 14:35:52,172 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 31 transitions, 75 flow [2024-10-14 14:35:52,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:52,173 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:35:52,174 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:35:52,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 14:35:52,175 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:35:52,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:35:52,175 INFO L85 PathProgramCache]: Analyzing trace with hash -837937516, now seen corresponding path program 2 times [2024-10-14 14:35:52,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:35:52,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093136236] [2024-10-14 14:35:52,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:52,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:35:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:35:52,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:35:52,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:35:52,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093136236] [2024-10-14 14:35:52,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093136236] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:35:52,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:35:52,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 14:35:52,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988423739] [2024-10-14 14:35:52,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:35:52,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 14:35:52,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:35:52,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 14:35:52,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 14:35:52,481 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:35:52,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 31 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:52,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:35:52,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:35:52,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:35:52,735 INFO L124 PetriNetUnfolderBase]: 309/520 cut-off events. [2024-10-14 14:35:52,735 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-10-14 14:35:52,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1107 conditions, 520 events. 309/520 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1927 event pairs, 174 based on Foata normal form. 6/428 useless extension candidates. Maximal degree in co-relation 1090. Up to 403 conditions per place. [2024-10-14 14:35:52,741 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 40 selfloop transitions, 1 changer transitions 9/51 dead transitions. [2024-10-14 14:35:52,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 51 transitions, 225 flow [2024-10-14 14:35:52,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 14:35:52,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 14:35:52,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 64 transitions. [2024-10-14 14:35:52,744 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-10-14 14:35:52,744 INFO L175 Difference]: Start difference. First operand has 31 places, 31 transitions, 75 flow. Second operand 4 states and 64 transitions. [2024-10-14 14:35:52,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 51 transitions, 225 flow [2024-10-14 14:35:52,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 51 transitions, 219 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-10-14 14:35:52,748 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 81 flow [2024-10-14 14:35:52,749 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=81, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2024-10-14 14:35:52,751 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2024-10-14 14:35:52,752 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 81 flow [2024-10-14 14:35:52,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:52,752 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:35:52,752 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:35:52,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 14:35:52,753 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:35:52,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:35:52,754 INFO L85 PathProgramCache]: Analyzing trace with hash -840877155, now seen corresponding path program 1 times [2024-10-14 14:35:52,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:35:52,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270166064] [2024-10-14 14:35:52,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:52,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:35:52,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:35:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:35:52,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:35:52,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270166064] [2024-10-14 14:35:52,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270166064] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:35:52,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:35:52,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 14:35:52,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807371291] [2024-10-14 14:35:52,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:35:52,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:35:52,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:35:52,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:35:52,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:35:52,822 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:35:52,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:52,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:35:52,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:35:52,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:35:52,931 INFO L124 PetriNetUnfolderBase]: 223/370 cut-off events. [2024-10-14 14:35:52,931 INFO L125 PetriNetUnfolderBase]: For 153/153 co-relation queries the response was YES. [2024-10-14 14:35:52,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 807 conditions, 370 events. 223/370 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1164 event pairs, 73 based on Foata normal form. 21/327 useless extension candidates. Maximal degree in co-relation 797. Up to 302 conditions per place. [2024-10-14 14:35:52,935 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 33 selfloop transitions, 2 changer transitions 5/41 dead transitions. [2024-10-14 14:35:52,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 41 transitions, 187 flow [2024-10-14 14:35:52,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:35:52,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:35:52,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2024-10-14 14:35:52,938 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-14 14:35:52,939 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 81 flow. Second operand 3 states and 51 transitions. [2024-10-14 14:35:52,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 41 transitions, 187 flow [2024-10-14 14:35:52,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 41 transitions, 184 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-10-14 14:35:52,943 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 84 flow [2024-10-14 14:35:52,944 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2024-10-14 14:35:52,945 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2024-10-14 14:35:52,945 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 84 flow [2024-10-14 14:35:52,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:52,946 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:35:52,946 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] [2024-10-14 14:35:52,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 14:35:52,946 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:35:52,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:35:52,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1355277831, now seen corresponding path program 1 times [2024-10-14 14:35:52,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:35:52,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136203115] [2024-10-14 14:35:52,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:52,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:35:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:35:53,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:35:53,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:35:53,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136203115] [2024-10-14 14:35:53,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136203115] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:35:53,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:35:53,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-14 14:35:53,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169111954] [2024-10-14 14:35:53,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:35:53,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 14:35:53,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:35:53,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 14:35:53,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-14 14:35:53,336 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:35:53,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 84 flow. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:53,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:35:53,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:35:53,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:35:53,628 INFO L124 PetriNetUnfolderBase]: 507/833 cut-off events. [2024-10-14 14:35:53,628 INFO L125 PetriNetUnfolderBase]: For 174/174 co-relation queries the response was YES. [2024-10-14 14:35:53,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1855 conditions, 833 events. 507/833 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3332 event pairs, 115 based on Foata normal form. 1/684 useless extension candidates. Maximal degree in co-relation 540. Up to 265 conditions per place. [2024-10-14 14:35:53,635 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 87 selfloop transitions, 14 changer transitions 1/103 dead transitions. [2024-10-14 14:35:53,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 103 transitions, 476 flow [2024-10-14 14:35:53,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 14:35:53,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-14 14:35:53,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-10-14 14:35:53,641 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4522058823529412 [2024-10-14 14:35:53,641 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 84 flow. Second operand 8 states and 123 transitions. [2024-10-14 14:35:53,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 103 transitions, 476 flow [2024-10-14 14:35:53,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 103 transitions, 452 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-10-14 14:35:53,646 INFO L231 Difference]: Finished difference. Result has 41 places, 44 transitions, 168 flow [2024-10-14 14:35:53,646 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=168, PETRI_PLACES=41, PETRI_TRANSITIONS=44} [2024-10-14 14:35:53,648 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 11 predicate places. [2024-10-14 14:35:53,648 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 44 transitions, 168 flow [2024-10-14 14:35:53,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:53,648 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:35:53,648 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] [2024-10-14 14:35:53,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 14:35:53,649 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:35:53,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:35:53,650 INFO L85 PathProgramCache]: Analyzing trace with hash 535894153, now seen corresponding path program 1 times [2024-10-14 14:35:53,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:35:53,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987982909] [2024-10-14 14:35:53,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:53,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:35:53,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:35:53,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:35:53,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:35:53,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987982909] [2024-10-14 14:35:53,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987982909] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:35:53,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322125826] [2024-10-14 14:35:53,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:53,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:35:53,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:35:53,958 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:35:53,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 14:35:54,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:35:54,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-14 14:35:54,067 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:35:54,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:35:54,452 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:35:55,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:35:55,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322125826] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-14 14:35:55,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-14 14:35:55,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2024-10-14 14:35:55,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119777069] [2024-10-14 14:35:55,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:35:55,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 14:35:55,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:35:55,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 14:35:55,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2024-10-14 14:35:55,448 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:35:55,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 44 transitions, 168 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:55,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:35:55,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:35:55,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:35:56,402 INFO L124 PetriNetUnfolderBase]: 1151/1915 cut-off events. [2024-10-14 14:35:56,402 INFO L125 PetriNetUnfolderBase]: For 366/366 co-relation queries the response was YES. [2024-10-14 14:35:56,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4751 conditions, 1915 events. 1151/1915 cut-off events. For 366/366 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9616 event pairs, 128 based on Foata normal form. 1/1740 useless extension candidates. Maximal degree in co-relation 2896. Up to 351 conditions per place. [2024-10-14 14:35:56,418 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 136 selfloop transitions, 46 changer transitions 7/190 dead transitions. [2024-10-14 14:35:56,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 190 transitions, 1002 flow [2024-10-14 14:35:56,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 14:35:56,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-14 14:35:56,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 201 transitions. [2024-10-14 14:35:56,425 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45475113122171945 [2024-10-14 14:35:56,425 INFO L175 Difference]: Start difference. First operand has 41 places, 44 transitions, 168 flow. Second operand 13 states and 201 transitions. [2024-10-14 14:35:56,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 190 transitions, 1002 flow [2024-10-14 14:35:56,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 190 transitions, 998 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-10-14 14:35:56,432 INFO L231 Difference]: Finished difference. Result has 62 places, 78 transitions, 521 flow [2024-10-14 14:35:56,433 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=521, PETRI_PLACES=62, PETRI_TRANSITIONS=78} [2024-10-14 14:35:56,435 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 32 predicate places. [2024-10-14 14:35:56,436 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 78 transitions, 521 flow [2024-10-14 14:35:56,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:56,436 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:35:56,436 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] [2024-10-14 14:35:56,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-14 14:35:56,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:35:56,637 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:35:56,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:35:56,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1211693247, now seen corresponding path program 2 times [2024-10-14 14:35:56,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:35:56,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328287811] [2024-10-14 14:35:56,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:56,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:35:56,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:35:56,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:35:56,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:35:56,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328287811] [2024-10-14 14:35:56,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328287811] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:35:56,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134943147] [2024-10-14 14:35:56,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:35:56,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:35:56,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:35:56,969 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:35:56,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 14:35:57,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 14:35:57,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:35:57,044 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-14 14:35:57,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:35:57,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:35:57,332 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 14:35:57,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134943147] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:35:57,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 14:35:57,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 16 [2024-10-14 14:35:57,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766818777] [2024-10-14 14:35:57,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:35:57,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 14:35:57,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:35:57,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 14:35:57,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-10-14 14:35:57,336 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:35:57,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 78 transitions, 521 flow. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:57,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:35:57,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:35:57,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:35:57,791 INFO L124 PetriNetUnfolderBase]: 1146/1915 cut-off events. [2024-10-14 14:35:57,792 INFO L125 PetriNetUnfolderBase]: For 2413/2413 co-relation queries the response was YES. [2024-10-14 14:35:57,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5918 conditions, 1915 events. 1146/1915 cut-off events. For 2413/2413 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9587 event pairs, 173 based on Foata normal form. 1/1742 useless extension candidates. Maximal degree in co-relation 5869. Up to 1163 conditions per place. [2024-10-14 14:35:57,811 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 93 selfloop transitions, 41 changer transitions 7/142 dead transitions. [2024-10-14 14:35:57,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 142 transitions, 1037 flow [2024-10-14 14:35:57,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 14:35:57,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-14 14:35:57,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 128 transitions. [2024-10-14 14:35:57,813 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41830065359477125 [2024-10-14 14:35:57,813 INFO L175 Difference]: Start difference. First operand has 62 places, 78 transitions, 521 flow. Second operand 9 states and 128 transitions. [2024-10-14 14:35:57,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 142 transitions, 1037 flow [2024-10-14 14:35:57,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 142 transitions, 1028 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-10-14 14:35:57,840 INFO L231 Difference]: Finished difference. Result has 71 places, 86 transitions, 701 flow [2024-10-14 14:35:57,841 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=701, PETRI_PLACES=71, PETRI_TRANSITIONS=86} [2024-10-14 14:35:57,841 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 41 predicate places. [2024-10-14 14:35:57,842 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 86 transitions, 701 flow [2024-10-14 14:35:57,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:57,843 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:35:57,843 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] [2024-10-14 14:35:57,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-14 14:35:58,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-14 14:35:58,044 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:35:58,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:35:58,045 INFO L85 PathProgramCache]: Analyzing trace with hash 987669410, now seen corresponding path program 1 times [2024-10-14 14:35:58,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:35:58,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750986889] [2024-10-14 14:35:58,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:58,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:35:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:35:58,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:35:58,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:35:58,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750986889] [2024-10-14 14:35:58,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750986889] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:35:58,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:35:58,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 14:35:58,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524717918] [2024-10-14 14:35:58,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:35:58,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 14:35:58,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:35:58,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 14:35:58,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 14:35:58,124 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:35:58,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 86 transitions, 701 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:58,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:35:58,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:35:58,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:35:58,438 INFO L124 PetriNetUnfolderBase]: 1151/1970 cut-off events. [2024-10-14 14:35:58,439 INFO L125 PetriNetUnfolderBase]: For 3874/3874 co-relation queries the response was YES. [2024-10-14 14:35:58,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6631 conditions, 1970 events. 1151/1970 cut-off events. For 3874/3874 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10256 event pairs, 663 based on Foata normal form. 0/1821 useless extension candidates. Maximal degree in co-relation 6574. Up to 1146 conditions per place. [2024-10-14 14:35:58,451 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 109 selfloop transitions, 12 changer transitions 7/129 dead transitions. [2024-10-14 14:35:58,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 129 transitions, 1192 flow [2024-10-14 14:35:58,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 14:35:58,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 14:35:58,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 84 transitions. [2024-10-14 14:35:58,453 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2024-10-14 14:35:58,453 INFO L175 Difference]: Start difference. First operand has 71 places, 86 transitions, 701 flow. Second operand 6 states and 84 transitions. [2024-10-14 14:35:58,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 129 transitions, 1192 flow [2024-10-14 14:35:58,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 129 transitions, 1123 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-10-14 14:35:58,467 INFO L231 Difference]: Finished difference. Result has 72 places, 80 transitions, 632 flow [2024-10-14 14:35:58,467 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=632, PETRI_PLACES=72, PETRI_TRANSITIONS=80} [2024-10-14 14:35:58,468 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2024-10-14 14:35:58,468 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 80 transitions, 632 flow [2024-10-14 14:35:58,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:58,468 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:35:58,468 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] [2024-10-14 14:35:58,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-14 14:35:58,469 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:35:58,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:35:58,469 INFO L85 PathProgramCache]: Analyzing trace with hash 351786427, now seen corresponding path program 1 times [2024-10-14 14:35:58,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:35:58,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452087582] [2024-10-14 14:35:58,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:58,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:35:58,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:35:58,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:35:58,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:35:58,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452087582] [2024-10-14 14:35:58,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452087582] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:35:58,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259152073] [2024-10-14 14:35:58,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:58,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:35:58,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:35:58,701 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:35:58,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 14:35:58,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:35:58,780 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-14 14:35:58,782 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:35:59,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:35:59,077 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:35:59,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:35:59,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259152073] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-14 14:35:59,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-14 14:35:59,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 22 [2024-10-14 14:35:59,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505253707] [2024-10-14 14:35:59,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:35:59,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 14:35:59,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:35:59,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 14:35:59,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2024-10-14 14:35:59,783 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:35:59,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 80 transitions, 632 flow. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:59,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:35:59,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:35:59,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:00,674 INFO L124 PetriNetUnfolderBase]: 1234/2116 cut-off events. [2024-10-14 14:36:00,675 INFO L125 PetriNetUnfolderBase]: For 4777/4777 co-relation queries the response was YES. [2024-10-14 14:36:00,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7188 conditions, 2116 events. 1234/2116 cut-off events. For 4777/4777 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11168 event pairs, 287 based on Foata normal form. 1/2000 useless extension candidates. Maximal degree in co-relation 5728. Up to 767 conditions per place. [2024-10-14 14:36:00,694 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 164 selfloop transitions, 42 changer transitions 9/216 dead transitions. [2024-10-14 14:36:00,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 216 transitions, 1655 flow [2024-10-14 14:36:00,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 14:36:00,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-14 14:36:00,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 216 transitions. [2024-10-14 14:36:00,696 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.453781512605042 [2024-10-14 14:36:00,696 INFO L175 Difference]: Start difference. First operand has 72 places, 80 transitions, 632 flow. Second operand 14 states and 216 transitions. [2024-10-14 14:36:00,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 216 transitions, 1655 flow [2024-10-14 14:36:00,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 216 transitions, 1637 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-10-14 14:36:00,725 INFO L231 Difference]: Finished difference. Result has 89 places, 94 transitions, 866 flow [2024-10-14 14:36:00,725 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=866, PETRI_PLACES=89, PETRI_TRANSITIONS=94} [2024-10-14 14:36:00,726 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 59 predicate places. [2024-10-14 14:36:00,726 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 94 transitions, 866 flow [2024-10-14 14:36:00,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:00,726 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:00,727 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] [2024-10-14 14:36:00,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-14 14:36:00,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:00,929 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:00,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:00,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1103325034, now seen corresponding path program 1 times [2024-10-14 14:36:00,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:00,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907324246] [2024-10-14 14:36:00,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:00,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:00,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:01,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:01,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:01,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907324246] [2024-10-14 14:36:01,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907324246] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:36:01,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:36:01,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 14:36:01,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568306417] [2024-10-14 14:36:01,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:01,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 14:36:01,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:01,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 14:36:01,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 14:36:01,027 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:01,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 94 transitions, 866 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:01,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:01,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:01,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:01,291 INFO L124 PetriNetUnfolderBase]: 986/1749 cut-off events. [2024-10-14 14:36:01,292 INFO L125 PetriNetUnfolderBase]: For 5591/5591 co-relation queries the response was YES. [2024-10-14 14:36:01,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6317 conditions, 1749 events. 986/1749 cut-off events. For 5591/5591 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9322 event pairs, 564 based on Foata normal form. 0/1690 useless extension candidates. Maximal degree in co-relation 6247. Up to 1146 conditions per place. [2024-10-14 14:36:01,307 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 89 selfloop transitions, 10 changer transitions 14/114 dead transitions. [2024-10-14 14:36:01,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 114 transitions, 1172 flow [2024-10-14 14:36:01,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 14:36:01,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 14:36:01,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 77 transitions. [2024-10-14 14:36:01,308 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37745098039215685 [2024-10-14 14:36:01,308 INFO L175 Difference]: Start difference. First operand has 89 places, 94 transitions, 866 flow. Second operand 6 states and 77 transitions. [2024-10-14 14:36:01,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 114 transitions, 1172 flow [2024-10-14 14:36:01,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 114 transitions, 1079 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-10-14 14:36:01,331 INFO L231 Difference]: Finished difference. Result has 91 places, 79 transitions, 634 flow [2024-10-14 14:36:01,332 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=634, PETRI_PLACES=91, PETRI_TRANSITIONS=79} [2024-10-14 14:36:01,332 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 61 predicate places. [2024-10-14 14:36:01,333 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 79 transitions, 634 flow [2024-10-14 14:36:01,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:01,333 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:01,333 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] [2024-10-14 14:36:01,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-14 14:36:01,334 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:01,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:01,334 INFO L85 PathProgramCache]: Analyzing trace with hash 199085239, now seen corresponding path program 3 times [2024-10-14 14:36:01,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:01,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065921485] [2024-10-14 14:36:01,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:01,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:01,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:01,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:01,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065921485] [2024-10-14 14:36:01,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065921485] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:01,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742101060] [2024-10-14 14:36:01,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:36:01,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:01,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:01,602 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:36:01,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 14:36:01,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-10-14 14:36:01,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:36:01,684 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-14 14:36:01,685 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:36:01,931 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 14:36:01,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742101060] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:36:01,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 14:36:01,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 16 [2024-10-14 14:36:01,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853066409] [2024-10-14 14:36:01,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:01,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 14:36:01,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:01,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 14:36:01,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-10-14 14:36:01,934 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:01,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 79 transitions, 634 flow. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:01,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:01,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:01,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:02,228 INFO L124 PetriNetUnfolderBase]: 853/1475 cut-off events. [2024-10-14 14:36:02,229 INFO L125 PetriNetUnfolderBase]: For 4282/4282 co-relation queries the response was YES. [2024-10-14 14:36:02,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5390 conditions, 1475 events. 853/1475 cut-off events. For 4282/4282 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7311 event pairs, 184 based on Foata normal form. 1/1474 useless extension candidates. Maximal degree in co-relation 5331. Up to 913 conditions per place. [2024-10-14 14:36:02,242 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 99 selfloop transitions, 30 changer transitions 7/137 dead transitions. [2024-10-14 14:36:02,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 137 transitions, 1127 flow [2024-10-14 14:36:02,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 14:36:02,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-14 14:36:02,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 129 transitions. [2024-10-14 14:36:02,244 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4215686274509804 [2024-10-14 14:36:02,244 INFO L175 Difference]: Start difference. First operand has 91 places, 79 transitions, 634 flow. Second operand 9 states and 129 transitions. [2024-10-14 14:36:02,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 137 transitions, 1127 flow [2024-10-14 14:36:02,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 137 transitions, 1071 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-10-14 14:36:02,267 INFO L231 Difference]: Finished difference. Result has 89 places, 78 transitions, 630 flow [2024-10-14 14:36:02,268 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=630, PETRI_PLACES=89, PETRI_TRANSITIONS=78} [2024-10-14 14:36:02,268 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 59 predicate places. [2024-10-14 14:36:02,269 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 78 transitions, 630 flow [2024-10-14 14:36:02,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:02,269 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:02,269 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] [2024-10-14 14:36:02,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-14 14:36:02,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:02,474 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:02,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:02,474 INFO L85 PathProgramCache]: Analyzing trace with hash 697496051, now seen corresponding path program 4 times [2024-10-14 14:36:02,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:02,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71463474] [2024-10-14 14:36:02,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:02,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:02,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:02,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71463474] [2024-10-14 14:36:02,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71463474] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:02,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723401057] [2024-10-14 14:36:02,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 14:36:02,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:02,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:02,702 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:36:02,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 14:36:02,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 14:36:02,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:36:02,782 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-14 14:36:02,784 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:03,060 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:36:03,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:03,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723401057] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:03,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-14 14:36:03,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2024-10-14 14:36:03,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026999681] [2024-10-14 14:36:03,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:03,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 14:36:03,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:03,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 14:36:03,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2024-10-14 14:36:03,469 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:03,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 78 transitions, 630 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:03,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:03,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:03,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:03,983 INFO L124 PetriNetUnfolderBase]: 844/1453 cut-off events. [2024-10-14 14:36:03,984 INFO L125 PetriNetUnfolderBase]: For 3774/3774 co-relation queries the response was YES. [2024-10-14 14:36:03,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5236 conditions, 1453 events. 844/1453 cut-off events. For 3774/3774 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7122 event pairs, 183 based on Foata normal form. 1/1452 useless extension candidates. Maximal degree in co-relation 5184. Up to 439 conditions per place. [2024-10-14 14:36:03,999 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 121 selfloop transitions, 34 changer transitions 8/164 dead transitions. [2024-10-14 14:36:04,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 164 transitions, 1322 flow [2024-10-14 14:36:04,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 14:36:04,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-14 14:36:04,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 167 transitions. [2024-10-14 14:36:04,002 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40931372549019607 [2024-10-14 14:36:04,002 INFO L175 Difference]: Start difference. First operand has 89 places, 78 transitions, 630 flow. Second operand 12 states and 167 transitions. [2024-10-14 14:36:04,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 164 transitions, 1322 flow [2024-10-14 14:36:04,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 164 transitions, 1254 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-10-14 14:36:04,019 INFO L231 Difference]: Finished difference. Result has 95 places, 79 transitions, 660 flow [2024-10-14 14:36:04,019 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=660, PETRI_PLACES=95, PETRI_TRANSITIONS=79} [2024-10-14 14:36:04,020 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 65 predicate places. [2024-10-14 14:36:04,020 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 79 transitions, 660 flow [2024-10-14 14:36:04,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:04,020 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:04,021 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] [2024-10-14 14:36:04,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-14 14:36:04,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-14 14:36:04,225 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:04,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:04,225 INFO L85 PathProgramCache]: Analyzing trace with hash 621901887, now seen corresponding path program 5 times [2024-10-14 14:36:04,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:04,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559351080] [2024-10-14 14:36:04,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:04,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:04,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:04,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559351080] [2024-10-14 14:36:04,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559351080] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:04,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97096413] [2024-10-14 14:36:04,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 14:36:04,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:04,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:04,473 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:36:04,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 14:36:04,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:36:04,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:36:04,566 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-14 14:36:04,568 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:04,835 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:36:05,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:05,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97096413] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:05,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-14 14:36:05,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2024-10-14 14:36:05,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667783314] [2024-10-14 14:36:05,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:05,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 14:36:05,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:05,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 14:36:05,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2024-10-14 14:36:05,439 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:05,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 79 transitions, 660 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:05,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:05,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:05,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:06,150 INFO L124 PetriNetUnfolderBase]: 913/1595 cut-off events. [2024-10-14 14:36:06,151 INFO L125 PetriNetUnfolderBase]: For 4625/4625 co-relation queries the response was YES. [2024-10-14 14:36:06,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5794 conditions, 1595 events. 913/1595 cut-off events. For 4625/4625 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8053 event pairs, 174 based on Foata normal form. 1/1594 useless extension candidates. Maximal degree in co-relation 5732. Up to 439 conditions per place. [2024-10-14 14:36:06,163 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 138 selfloop transitions, 38 changer transitions 9/186 dead transitions. [2024-10-14 14:36:06,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 186 transitions, 1500 flow [2024-10-14 14:36:06,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 14:36:06,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-14 14:36:06,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 192 transitions. [2024-10-14 14:36:06,165 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4343891402714932 [2024-10-14 14:36:06,165 INFO L175 Difference]: Start difference. First operand has 95 places, 79 transitions, 660 flow. Second operand 13 states and 192 transitions. [2024-10-14 14:36:06,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 186 transitions, 1500 flow [2024-10-14 14:36:06,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 186 transitions, 1441 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-10-14 14:36:06,182 INFO L231 Difference]: Finished difference. Result has 102 places, 84 transitions, 770 flow [2024-10-14 14:36:06,183 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=770, PETRI_PLACES=102, PETRI_TRANSITIONS=84} [2024-10-14 14:36:06,183 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 72 predicate places. [2024-10-14 14:36:06,183 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 84 transitions, 770 flow [2024-10-14 14:36:06,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:06,184 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:06,184 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] [2024-10-14 14:36:06,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-14 14:36:06,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:06,385 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:06,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:06,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1128295419, now seen corresponding path program 2 times [2024-10-14 14:36:06,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:06,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523352098] [2024-10-14 14:36:06,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:06,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:06,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:06,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:06,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:06,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523352098] [2024-10-14 14:36:06,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523352098] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:06,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557764875] [2024-10-14 14:36:06,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:36:06,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:06,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:06,625 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:36:06,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-14 14:36:06,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 14:36:06,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:36:06,707 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-14 14:36:06,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:06,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:36:06,955 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 14:36:06,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557764875] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:36:06,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 14:36:06,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2024-10-14 14:36:06,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527355118] [2024-10-14 14:36:06,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:06,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 14:36:06,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:06,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 14:36:06,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-10-14 14:36:06,961 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:06,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 84 transitions, 770 flow. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:06,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:06,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:06,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:07,265 INFO L124 PetriNetUnfolderBase]: 909/1591 cut-off events. [2024-10-14 14:36:07,265 INFO L125 PetriNetUnfolderBase]: For 5399/5399 co-relation queries the response was YES. [2024-10-14 14:36:07,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5991 conditions, 1591 events. 909/1591 cut-off events. For 5399/5399 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8068 event pairs, 243 based on Foata normal form. 1/1590 useless extension candidates. Maximal degree in co-relation 5926. Up to 1036 conditions per place. [2024-10-14 14:36:07,276 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 91 selfloop transitions, 27 changer transitions 11/130 dead transitions. [2024-10-14 14:36:07,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 130 transitions, 1250 flow [2024-10-14 14:36:07,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 14:36:07,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-14 14:36:07,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-10-14 14:36:07,278 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3627450980392157 [2024-10-14 14:36:07,278 INFO L175 Difference]: Start difference. First operand has 102 places, 84 transitions, 770 flow. Second operand 9 states and 111 transitions. [2024-10-14 14:36:07,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 130 transitions, 1250 flow [2024-10-14 14:36:07,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 130 transitions, 1201 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-10-14 14:36:07,300 INFO L231 Difference]: Finished difference. Result has 106 places, 86 transitions, 830 flow [2024-10-14 14:36:07,301 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=830, PETRI_PLACES=106, PETRI_TRANSITIONS=86} [2024-10-14 14:36:07,301 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 76 predicate places. [2024-10-14 14:36:07,301 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 86 transitions, 830 flow [2024-10-14 14:36:07,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:07,302 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:07,302 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] [2024-10-14 14:36:07,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-14 14:36:07,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:07,507 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:07,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:07,507 INFO L85 PathProgramCache]: Analyzing trace with hash -593067301, now seen corresponding path program 6 times [2024-10-14 14:36:07,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:07,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179513967] [2024-10-14 14:36:07,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:07,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:07,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:07,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:07,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179513967] [2024-10-14 14:36:07,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179513967] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:07,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226763790] [2024-10-14 14:36:07,725 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 14:36:07,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:07,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:07,727 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:36:07,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-14 14:36:07,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-10-14 14:36:07,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:36:07,806 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-14 14:36:07,808 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:08,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:36:08,035 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 14:36:08,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226763790] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:36:08,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 14:36:08,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 16 [2024-10-14 14:36:08,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370457311] [2024-10-14 14:36:08,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:08,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 14:36:08,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:08,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 14:36:08,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2024-10-14 14:36:08,038 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:08,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 86 transitions, 830 flow. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:08,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:08,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:08,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:08,344 INFO L124 PetriNetUnfolderBase]: 883/1537 cut-off events. [2024-10-14 14:36:08,344 INFO L125 PetriNetUnfolderBase]: For 5277/5277 co-relation queries the response was YES. [2024-10-14 14:36:08,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6078 conditions, 1537 events. 883/1537 cut-off events. For 5277/5277 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7671 event pairs, 211 based on Foata normal form. 1/1536 useless extension candidates. Maximal degree in co-relation 5976. Up to 893 conditions per place. [2024-10-14 14:36:08,354 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 97 selfloop transitions, 32 changer transitions 8/138 dead transitions. [2024-10-14 14:36:08,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 138 transitions, 1313 flow [2024-10-14 14:36:08,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 14:36:08,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-14 14:36:08,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 122 transitions. [2024-10-14 14:36:08,355 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39869281045751637 [2024-10-14 14:36:08,356 INFO L175 Difference]: Start difference. First operand has 106 places, 86 transitions, 830 flow. Second operand 9 states and 122 transitions. [2024-10-14 14:36:08,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 138 transitions, 1313 flow [2024-10-14 14:36:08,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 138 transitions, 1239 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-10-14 14:36:08,377 INFO L231 Difference]: Finished difference. Result has 109 places, 86 transitions, 826 flow [2024-10-14 14:36:08,378 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=826, PETRI_PLACES=109, PETRI_TRANSITIONS=86} [2024-10-14 14:36:08,378 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 79 predicate places. [2024-10-14 14:36:08,379 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 86 transitions, 826 flow [2024-10-14 14:36:08,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:08,379 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:08,379 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] [2024-10-14 14:36:08,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-14 14:36:08,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-14 14:36:08,580 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:08,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:08,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1633684973, now seen corresponding path program 3 times [2024-10-14 14:36:08,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:08,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307888666] [2024-10-14 14:36:08,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:08,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:08,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:08,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:08,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307888666] [2024-10-14 14:36:08,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307888666] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:08,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726970395] [2024-10-14 14:36:08,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:36:08,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:08,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:08,776 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:36:08,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-14 14:36:08,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-10-14 14:36:08,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:36:08,844 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-14 14:36:08,845 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:09,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:36:09,041 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 14:36:09,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726970395] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:36:09,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 14:36:09,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2024-10-14 14:36:09,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295326551] [2024-10-14 14:36:09,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:09,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 14:36:09,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:09,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 14:36:09,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2024-10-14 14:36:09,042 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:09,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 86 transitions, 826 flow. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:09,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:09,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:09,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:09,249 INFO L124 PetriNetUnfolderBase]: 874/1515 cut-off events. [2024-10-14 14:36:09,249 INFO L125 PetriNetUnfolderBase]: For 5351/5351 co-relation queries the response was YES. [2024-10-14 14:36:09,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5910 conditions, 1515 events. 874/1515 cut-off events. For 5351/5351 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7548 event pairs, 228 based on Foata normal form. 1/1514 useless extension candidates. Maximal degree in co-relation 5850. Up to 968 conditions per place. [2024-10-14 14:36:09,258 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 85 selfloop transitions, 25 changer transitions 18/129 dead transitions. [2024-10-14 14:36:09,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 129 transitions, 1263 flow [2024-10-14 14:36:09,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 14:36:09,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-14 14:36:09,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 112 transitions. [2024-10-14 14:36:09,259 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3660130718954248 [2024-10-14 14:36:09,259 INFO L175 Difference]: Start difference. First operand has 109 places, 86 transitions, 826 flow. Second operand 9 states and 112 transitions. [2024-10-14 14:36:09,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 129 transitions, 1263 flow [2024-10-14 14:36:09,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 129 transitions, 1201 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-10-14 14:36:09,284 INFO L231 Difference]: Finished difference. Result has 110 places, 83 transitions, 796 flow [2024-10-14 14:36:09,284 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=796, PETRI_PLACES=110, PETRI_TRANSITIONS=83} [2024-10-14 14:36:09,285 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 80 predicate places. [2024-10-14 14:36:09,286 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 83 transitions, 796 flow [2024-10-14 14:36:09,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:09,286 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:09,286 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] [2024-10-14 14:36:09,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-14 14:36:09,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-14 14:36:09,487 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:09,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:09,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1135274161, now seen corresponding path program 4 times [2024-10-14 14:36:09,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:09,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572564496] [2024-10-14 14:36:09,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:09,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:09,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:09,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:09,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:09,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572564496] [2024-10-14 14:36:09,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572564496] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:09,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218742379] [2024-10-14 14:36:09,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 14:36:09,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:09,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:09,713 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:36:09,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-14 14:36:09,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 14:36:09,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:36:09,791 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-14 14:36:09,793 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:10,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:10,051 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:36:10,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:10,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218742379] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:10,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-14 14:36:10,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9, 10] total 27 [2024-10-14 14:36:10,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427059776] [2024-10-14 14:36:10,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:10,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 14:36:10,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:10,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 14:36:10,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2024-10-14 14:36:10,420 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:10,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 83 transitions, 796 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:10,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:10,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:10,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:11,192 INFO L124 PetriNetUnfolderBase]: 1030/1785 cut-off events. [2024-10-14 14:36:11,192 INFO L125 PetriNetUnfolderBase]: For 6394/6394 co-relation queries the response was YES. [2024-10-14 14:36:11,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7019 conditions, 1785 events. 1030/1785 cut-off events. For 6394/6394 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9185 event pairs, 177 based on Foata normal form. 2/1785 useless extension candidates. Maximal degree in co-relation 6791. Up to 612 conditions per place. [2024-10-14 14:36:11,201 INFO L140 encePairwiseOnDemand]: 19/34 looper letters, 154 selfloop transitions, 54 changer transitions 12/221 dead transitions. [2024-10-14 14:36:11,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 221 transitions, 1990 flow [2024-10-14 14:36:11,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-14 14:36:11,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-14 14:36:11,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 220 transitions. [2024-10-14 14:36:11,203 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43137254901960786 [2024-10-14 14:36:11,203 INFO L175 Difference]: Start difference. First operand has 110 places, 83 transitions, 796 flow. Second operand 15 states and 220 transitions. [2024-10-14 14:36:11,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 221 transitions, 1990 flow [2024-10-14 14:36:11,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 221 transitions, 1887 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-10-14 14:36:11,228 INFO L231 Difference]: Finished difference. Result has 120 places, 102 transitions, 1068 flow [2024-10-14 14:36:11,228 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=724, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1068, PETRI_PLACES=120, PETRI_TRANSITIONS=102} [2024-10-14 14:36:11,228 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 90 predicate places. [2024-10-14 14:36:11,229 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 102 transitions, 1068 flow [2024-10-14 14:36:11,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:11,229 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:11,229 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] [2024-10-14 14:36:11,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-14 14:36:11,433 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-14 14:36:11,434 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:11,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:11,434 INFO L85 PathProgramCache]: Analyzing trace with hash -620497227, now seen corresponding path program 5 times [2024-10-14 14:36:11,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:11,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674647681] [2024-10-14 14:36:11,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:11,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:11,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:11,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:11,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:11,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674647681] [2024-10-14 14:36:11,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674647681] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:11,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260898369] [2024-10-14 14:36:11,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 14:36:11,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:11,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:11,649 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:36:11,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-14 14:36:11,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:36:11,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:36:11,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-14 14:36:11,729 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:11,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:11,970 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:36:12,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:12,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260898369] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:12,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-14 14:36:12,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 23 [2024-10-14 14:36:12,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971618774] [2024-10-14 14:36:12,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:12,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 14:36:12,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:12,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 14:36:12,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2024-10-14 14:36:12,562 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:12,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 102 transitions, 1068 flow. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:12,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:12,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:12,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:13,119 INFO L124 PetriNetUnfolderBase]: 997/1717 cut-off events. [2024-10-14 14:36:13,120 INFO L125 PetriNetUnfolderBase]: For 8534/8534 co-relation queries the response was YES. [2024-10-14 14:36:13,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7460 conditions, 1717 events. 997/1717 cut-off events. For 8534/8534 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8634 event pairs, 259 based on Foata normal form. 1/1716 useless extension candidates. Maximal degree in co-relation 7390. Up to 1120 conditions per place. [2024-10-14 14:36:13,131 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 93 selfloop transitions, 30 changer transitions 21/145 dead transitions. [2024-10-14 14:36:13,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 145 transitions, 1537 flow [2024-10-14 14:36:13,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 14:36:13,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-14 14:36:13,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 125 transitions. [2024-10-14 14:36:13,133 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.30637254901960786 [2024-10-14 14:36:13,133 INFO L175 Difference]: Start difference. First operand has 120 places, 102 transitions, 1068 flow. Second operand 12 states and 125 transitions. [2024-10-14 14:36:13,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 145 transitions, 1537 flow [2024-10-14 14:36:13,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 145 transitions, 1381 flow, removed 29 selfloop flow, removed 12 redundant places. [2024-10-14 14:36:13,165 INFO L231 Difference]: Finished difference. Result has 119 places, 95 transitions, 894 flow [2024-10-14 14:36:13,165 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=894, PETRI_PLACES=119, PETRI_TRANSITIONS=95} [2024-10-14 14:36:13,166 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 89 predicate places. [2024-10-14 14:36:13,166 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 95 transitions, 894 flow [2024-10-14 14:36:13,166 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:13,166 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:13,166 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] [2024-10-14 14:36:13,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-14 14:36:13,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-14 14:36:13,367 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:13,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:13,367 INFO L85 PathProgramCache]: Analyzing trace with hash 401838977, now seen corresponding path program 6 times [2024-10-14 14:36:13,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:13,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616406452] [2024-10-14 14:36:13,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:13,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:13,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:13,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:13,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616406452] [2024-10-14 14:36:13,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616406452] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:13,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020493082] [2024-10-14 14:36:13,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 14:36:13,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:13,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:13,553 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:36:13,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-14 14:36:13,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-10-14 14:36:13,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:36:13,630 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-14 14:36:13,631 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:13,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:36:13,835 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 14:36:13,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020493082] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:36:13,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 14:36:13,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2024-10-14 14:36:13,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972973175] [2024-10-14 14:36:13,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:13,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 14:36:13,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:13,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 14:36:13,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-10-14 14:36:13,837 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:13,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 95 transitions, 894 flow. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:13,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:13,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:13,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:14,100 INFO L124 PetriNetUnfolderBase]: 953/1630 cut-off events. [2024-10-14 14:36:14,100 INFO L125 PetriNetUnfolderBase]: For 6908/6908 co-relation queries the response was YES. [2024-10-14 14:36:14,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6866 conditions, 1630 events. 953/1630 cut-off events. For 6908/6908 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8017 event pairs, 259 based on Foata normal form. 1/1629 useless extension candidates. Maximal degree in co-relation 6803. Up to 1120 conditions per place. [2024-10-14 14:36:14,110 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 73 selfloop transitions, 25 changer transitions 25/124 dead transitions. [2024-10-14 14:36:14,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 124 transitions, 1251 flow [2024-10-14 14:36:14,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 14:36:14,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-14 14:36:14,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2024-10-14 14:36:14,112 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3235294117647059 [2024-10-14 14:36:14,112 INFO L175 Difference]: Start difference. First operand has 119 places, 95 transitions, 894 flow. Second operand 9 states and 99 transitions. [2024-10-14 14:36:14,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 124 transitions, 1251 flow [2024-10-14 14:36:14,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 124 transitions, 1178 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-10-14 14:36:14,160 INFO L231 Difference]: Finished difference. Result has 114 places, 87 transitions, 817 flow [2024-10-14 14:36:14,160 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=817, PETRI_PLACES=114, PETRI_TRANSITIONS=87} [2024-10-14 14:36:14,161 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 84 predicate places. [2024-10-14 14:36:14,161 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 87 transitions, 817 flow [2024-10-14 14:36:14,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:14,161 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:14,162 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] [2024-10-14 14:36:14,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-14 14:36:14,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-14 14:36:14,362 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:14,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:14,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1038818068, now seen corresponding path program 1 times [2024-10-14 14:36:14,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:14,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413943506] [2024-10-14 14:36:14,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:14,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:14,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:14,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:36:14,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:14,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413943506] [2024-10-14 14:36:14,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413943506] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:36:14,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:36:14,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 14:36:14,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858804495] [2024-10-14 14:36:14,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:14,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 14:36:14,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:14,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 14:36:14,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 14:36:14,446 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:14,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 87 transitions, 817 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) [2024-10-14 14:36:14,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:14,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:14,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:14,678 INFO L124 PetriNetUnfolderBase]: 710/1227 cut-off events. [2024-10-14 14:36:14,679 INFO L125 PetriNetUnfolderBase]: For 5318/5318 co-relation queries the response was YES. [2024-10-14 14:36:14,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5213 conditions, 1227 events. 710/1227 cut-off events. For 5318/5318 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5741 event pairs, 420 based on Foata normal form. 38/1264 useless extension candidates. Maximal degree in co-relation 5160. Up to 719 conditions per place. [2024-10-14 14:36:14,687 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 89 selfloop transitions, 9 changer transitions 8/107 dead transitions. [2024-10-14 14:36:14,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 107 transitions, 1107 flow [2024-10-14 14:36:14,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 14:36:14,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 14:36:14,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2024-10-14 14:36:14,688 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45294117647058824 [2024-10-14 14:36:14,688 INFO L175 Difference]: Start difference. First operand has 114 places, 87 transitions, 817 flow. Second operand 5 states and 77 transitions. [2024-10-14 14:36:14,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 107 transitions, 1107 flow [2024-10-14 14:36:14,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 107 transitions, 953 flow, removed 26 selfloop flow, removed 13 redundant places. [2024-10-14 14:36:14,707 INFO L231 Difference]: Finished difference. Result has 92 places, 73 transitions, 558 flow [2024-10-14 14:36:14,708 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=584, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=558, PETRI_PLACES=92, PETRI_TRANSITIONS=73} [2024-10-14 14:36:14,708 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 62 predicate places. [2024-10-14 14:36:14,708 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 73 transitions, 558 flow [2024-10-14 14:36:14,708 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) [2024-10-14 14:36:14,709 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:14,709 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] [2024-10-14 14:36:14,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-10-14 14:36:14,709 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:14,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:14,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1004186794, now seen corresponding path program 1 times [2024-10-14 14:36:14,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:14,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982889026] [2024-10-14 14:36:14,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:14,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:14,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:36:14,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:14,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982889026] [2024-10-14 14:36:14,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982889026] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:36:14,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:36:14,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 14:36:14,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027526057] [2024-10-14 14:36:14,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:14,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 14:36:14,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:14,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 14:36:14,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 14:36:14,775 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:14,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 73 transitions, 558 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) [2024-10-14 14:36:14,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:14,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:14,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:14,893 INFO L124 PetriNetUnfolderBase]: 536/942 cut-off events. [2024-10-14 14:36:14,893 INFO L125 PetriNetUnfolderBase]: For 2608/2608 co-relation queries the response was YES. [2024-10-14 14:36:14,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3601 conditions, 942 events. 536/942 cut-off events. For 2608/2608 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4179 event pairs, 323 based on Foata normal form. 0/905 useless extension candidates. Maximal degree in co-relation 3571. Up to 719 conditions per place. [2024-10-14 14:36:14,897 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 51 selfloop transitions, 2 changer transitions 28/82 dead transitions. [2024-10-14 14:36:14,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 82 transitions, 712 flow [2024-10-14 14:36:14,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 14:36:14,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 14:36:14,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-10-14 14:36:14,899 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38823529411764707 [2024-10-14 14:36:14,899 INFO L175 Difference]: Start difference. First operand has 92 places, 73 transitions, 558 flow. Second operand 5 states and 66 transitions. [2024-10-14 14:36:14,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 82 transitions, 712 flow [2024-10-14 14:36:14,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 82 transitions, 676 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-10-14 14:36:14,907 INFO L231 Difference]: Finished difference. Result has 85 places, 54 transitions, 339 flow [2024-10-14 14:36:14,907 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=339, PETRI_PLACES=85, PETRI_TRANSITIONS=54} [2024-10-14 14:36:14,908 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 55 predicate places. [2024-10-14 14:36:14,908 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 54 transitions, 339 flow [2024-10-14 14:36:14,908 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) [2024-10-14 14:36:14,908 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:14,908 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] [2024-10-14 14:36:14,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-10-14 14:36:14,909 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:14,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:14,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1735061807, now seen corresponding path program 1 times [2024-10-14 14:36:14,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:14,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58089572] [2024-10-14 14:36:14,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:14,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:14,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:15,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:15,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:15,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58089572] [2024-10-14 14:36:15,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58089572] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:15,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842692663] [2024-10-14 14:36:15,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:15,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:15,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:15,012 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:36:15,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-14 14:36:15,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:15,094 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 14:36:15,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:15,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:15,175 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:36:15,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:15,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842692663] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:15,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-14 14:36:15,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2024-10-14 14:36:15,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139402601] [2024-10-14 14:36:15,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:15,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 14:36:15,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:15,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 14:36:15,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-10-14 14:36:15,256 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:15,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 54 transitions, 339 flow. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:15,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:15,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:15,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:15,369 INFO L124 PetriNetUnfolderBase]: 497/843 cut-off events. [2024-10-14 14:36:15,369 INFO L125 PetriNetUnfolderBase]: For 2002/2002 co-relation queries the response was YES. [2024-10-14 14:36:15,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3250 conditions, 843 events. 497/843 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3454 event pairs, 231 based on Foata normal form. 36/878 useless extension candidates. Maximal degree in co-relation 3221. Up to 547 conditions per place. [2024-10-14 14:36:15,387 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 67 selfloop transitions, 9 changer transitions 0/77 dead transitions. [2024-10-14 14:36:15,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 77 transitions, 648 flow [2024-10-14 14:36:15,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 14:36:15,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-14 14:36:15,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 64 transitions. [2024-10-14 14:36:15,388 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2689075630252101 [2024-10-14 14:36:15,388 INFO L175 Difference]: Start difference. First operand has 85 places, 54 transitions, 339 flow. Second operand 7 states and 64 transitions. [2024-10-14 14:36:15,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 77 transitions, 648 flow [2024-10-14 14:36:15,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 77 transitions, 616 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-10-14 14:36:15,392 INFO L231 Difference]: Finished difference. Result has 68 places, 56 transitions, 364 flow [2024-10-14 14:36:15,393 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=364, PETRI_PLACES=68, PETRI_TRANSITIONS=56} [2024-10-14 14:36:15,393 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 38 predicate places. [2024-10-14 14:36:15,393 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 56 transitions, 364 flow [2024-10-14 14:36:15,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:15,393 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:15,393 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, 1] [2024-10-14 14:36:15,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-14 14:36:15,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-10-14 14:36:15,595 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:15,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:15,595 INFO L85 PathProgramCache]: Analyzing trace with hash -304506486, now seen corresponding path program 1 times [2024-10-14 14:36:15,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:15,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491537899] [2024-10-14 14:36:15,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:15,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:15,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:15,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:15,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491537899] [2024-10-14 14:36:15,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491537899] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:15,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871465097] [2024-10-14 14:36:15,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:15,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:15,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:15,740 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:36:15,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-14 14:36:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:15,823 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 14:36:15,824 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:15,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:15,890 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:36:15,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:15,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871465097] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:15,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-14 14:36:15,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2024-10-14 14:36:15,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931584976] [2024-10-14 14:36:15,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:15,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 14:36:15,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:15,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 14:36:15,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2024-10-14 14:36:15,957 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:15,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 56 transitions, 364 flow. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:15,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:15,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:15,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:16,073 INFO L124 PetriNetUnfolderBase]: 364/613 cut-off events. [2024-10-14 14:36:16,073 INFO L125 PetriNetUnfolderBase]: For 1249/1249 co-relation queries the response was YES. [2024-10-14 14:36:16,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2454 conditions, 613 events. 364/613 cut-off events. For 1249/1249 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2207 event pairs, 185 based on Foata normal form. 20/632 useless extension candidates. Maximal degree in co-relation 2431. Up to 434 conditions per place. [2024-10-14 14:36:16,076 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 49 selfloop transitions, 12 changer transitions 0/62 dead transitions. [2024-10-14 14:36:16,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 62 transitions, 511 flow [2024-10-14 14:36:16,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 14:36:16,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-14 14:36:16,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 65 transitions. [2024-10-14 14:36:16,077 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.27310924369747897 [2024-10-14 14:36:16,077 INFO L175 Difference]: Start difference. First operand has 68 places, 56 transitions, 364 flow. Second operand 7 states and 65 transitions. [2024-10-14 14:36:16,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 62 transitions, 511 flow [2024-10-14 14:36:16,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 62 transitions, 486 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-10-14 14:36:16,081 INFO L231 Difference]: Finished difference. Result has 65 places, 49 transitions, 329 flow [2024-10-14 14:36:16,082 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=329, PETRI_PLACES=65, PETRI_TRANSITIONS=49} [2024-10-14 14:36:16,082 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2024-10-14 14:36:16,082 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 49 transitions, 329 flow [2024-10-14 14:36:16,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:16,083 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:16,083 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, 1, 1] [2024-10-14 14:36:16,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-14 14:36:16,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:16,284 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:16,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:16,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1156338135, now seen corresponding path program 1 times [2024-10-14 14:36:16,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:16,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357410760] [2024-10-14 14:36:16,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:16,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:17,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:17,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:17,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357410760] [2024-10-14 14:36:17,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357410760] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:17,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908009360] [2024-10-14 14:36:17,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:17,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:17,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:17,352 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:36:17,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-14 14:36:17,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:17,436 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-10-14 14:36:17,437 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:17,915 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-14 14:36:17,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-10-14 14:36:18,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:18,008 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:36:18,477 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-10-14 14:36:18,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 82 [2024-10-14 14:36:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:36:18,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908009360] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:18,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-14 14:36:18,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 13] total 33 [2024-10-14 14:36:18,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498883914] [2024-10-14 14:36:18,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:18,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 14:36:18,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:18,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 14:36:18,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2024-10-14 14:36:18,556 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:18,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 49 transitions, 329 flow. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:18,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:18,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:18,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:19,642 INFO L124 PetriNetUnfolderBase]: 569/967 cut-off events. [2024-10-14 14:36:19,642 INFO L125 PetriNetUnfolderBase]: For 2096/2096 co-relation queries the response was YES. [2024-10-14 14:36:19,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3865 conditions, 967 events. 569/967 cut-off events. For 2096/2096 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4199 event pairs, 97 based on Foata normal form. 1/967 useless extension candidates. Maximal degree in co-relation 3844. Up to 383 conditions per place. [2024-10-14 14:36:19,646 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 101 selfloop transitions, 31 changer transitions 10/143 dead transitions. [2024-10-14 14:36:19,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 143 transitions, 1091 flow [2024-10-14 14:36:19,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 14:36:19,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-14 14:36:19,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 169 transitions. [2024-10-14 14:36:19,647 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3550420168067227 [2024-10-14 14:36:19,648 INFO L175 Difference]: Start difference. First operand has 65 places, 49 transitions, 329 flow. Second operand 14 states and 169 transitions. [2024-10-14 14:36:19,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 143 transitions, 1091 flow [2024-10-14 14:36:19,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 143 transitions, 1071 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-10-14 14:36:19,657 INFO L231 Difference]: Finished difference. Result has 83 places, 67 transitions, 596 flow [2024-10-14 14:36:19,657 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=596, PETRI_PLACES=83, PETRI_TRANSITIONS=67} [2024-10-14 14:36:19,658 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 53 predicate places. [2024-10-14 14:36:19,658 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 67 transitions, 596 flow [2024-10-14 14:36:19,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:19,658 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:19,658 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, 1, 1] [2024-10-14 14:36:19,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-14 14:36:19,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:19,859 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:19,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:19,860 INFO L85 PathProgramCache]: Analyzing trace with hash -834199651, now seen corresponding path program 2 times [2024-10-14 14:36:19,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:19,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342320846] [2024-10-14 14:36:19,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:19,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:19,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:20,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:20,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:20,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342320846] [2024-10-14 14:36:20,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342320846] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:20,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112766923] [2024-10-14 14:36:20,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:36:20,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:20,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:20,796 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:36:20,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-14 14:36:20,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 14:36:20,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:36:20,889 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-14 14:36:20,890 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:21,008 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-14 14:36:21,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-10-14 14:36:21,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:36:21,109 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 14:36:21,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112766923] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:36:21,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 14:36:21,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2024-10-14 14:36:21,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137897832] [2024-10-14 14:36:21,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:21,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 14:36:21,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:21,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 14:36:21,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2024-10-14 14:36:21,110 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:21,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 67 transitions, 596 flow. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:21,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:21,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:21,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:21,396 INFO L124 PetriNetUnfolderBase]: 625/1054 cut-off events. [2024-10-14 14:36:21,396 INFO L125 PetriNetUnfolderBase]: For 5175/5175 co-relation queries the response was YES. [2024-10-14 14:36:21,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5084 conditions, 1054 events. 625/1054 cut-off events. For 5175/5175 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4618 event pairs, 312 based on Foata normal form. 1/1054 useless extension candidates. Maximal degree in co-relation 5053. Up to 787 conditions per place. [2024-10-14 14:36:21,403 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 78 selfloop transitions, 26 changer transitions 14/119 dead transitions. [2024-10-14 14:36:21,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 119 transitions, 1266 flow [2024-10-14 14:36:21,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 14:36:21,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-14 14:36:21,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-10-14 14:36:21,405 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3205882352941177 [2024-10-14 14:36:21,405 INFO L175 Difference]: Start difference. First operand has 83 places, 67 transitions, 596 flow. Second operand 10 states and 109 transitions. [2024-10-14 14:36:21,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 119 transitions, 1266 flow [2024-10-14 14:36:21,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 119 transitions, 1220 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-10-14 14:36:21,415 INFO L231 Difference]: Finished difference. Result has 94 places, 84 transitions, 888 flow [2024-10-14 14:36:21,415 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=888, PETRI_PLACES=94, PETRI_TRANSITIONS=84} [2024-10-14 14:36:21,416 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 64 predicate places. [2024-10-14 14:36:21,416 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 84 transitions, 888 flow [2024-10-14 14:36:21,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:21,416 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:21,416 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, 1, 1] [2024-10-14 14:36:21,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-14 14:36:21,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-10-14 14:36:21,617 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:21,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:21,618 INFO L85 PathProgramCache]: Analyzing trace with hash 81051381, now seen corresponding path program 3 times [2024-10-14 14:36:21,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:21,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866453582] [2024-10-14 14:36:21,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:21,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:21,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:22,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:22,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:22,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866453582] [2024-10-14 14:36:22,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866453582] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:22,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290239314] [2024-10-14 14:36:22,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:36:22,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:22,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:22,474 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:36:22,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-14 14:36:22,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-10-14 14:36:22,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:36:22,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-14 14:36:22,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:22,786 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-14 14:36:22,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-10-14 14:36:22,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:36:22,874 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 14:36:22,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290239314] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:36:22,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 14:36:22,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2024-10-14 14:36:22,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778097183] [2024-10-14 14:36:22,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:22,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 14:36:22,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:22,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 14:36:22,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2024-10-14 14:36:22,876 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:22,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 84 transitions, 888 flow. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:22,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:22,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:22,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:23,277 INFO L124 PetriNetUnfolderBase]: 610/1032 cut-off events. [2024-10-14 14:36:23,277 INFO L125 PetriNetUnfolderBase]: For 6309/6309 co-relation queries the response was YES. [2024-10-14 14:36:23,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5354 conditions, 1032 events. 610/1032 cut-off events. For 6309/6309 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4566 event pairs, 232 based on Foata normal form. 1/1032 useless extension candidates. Maximal degree in co-relation 5317. Up to 567 conditions per place. [2024-10-14 14:36:23,284 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 119 selfloop transitions, 24 changer transitions 18/162 dead transitions. [2024-10-14 14:36:23,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 162 transitions, 1802 flow [2024-10-14 14:36:23,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 14:36:23,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-14 14:36:23,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 143 transitions. [2024-10-14 14:36:23,285 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35049019607843135 [2024-10-14 14:36:23,286 INFO L175 Difference]: Start difference. First operand has 94 places, 84 transitions, 888 flow. Second operand 12 states and 143 transitions. [2024-10-14 14:36:23,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 162 transitions, 1802 flow [2024-10-14 14:36:23,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 162 transitions, 1678 flow, removed 62 selfloop flow, removed 2 redundant places. [2024-10-14 14:36:23,303 INFO L231 Difference]: Finished difference. Result has 103 places, 81 transitions, 854 flow [2024-10-14 14:36:23,303 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=854, PETRI_PLACES=103, PETRI_TRANSITIONS=81} [2024-10-14 14:36:23,304 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 73 predicate places. [2024-10-14 14:36:23,304 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 81 transitions, 854 flow [2024-10-14 14:36:23,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:23,304 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:23,304 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, 1, 1] [2024-10-14 14:36:23,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-14 14:36:23,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:23,505 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:23,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:23,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1938545821, now seen corresponding path program 4 times [2024-10-14 14:36:23,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:23,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749175098] [2024-10-14 14:36:23,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:23,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:24,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:24,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:24,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749175098] [2024-10-14 14:36:24,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749175098] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:24,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166901321] [2024-10-14 14:36:24,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 14:36:24,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:24,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:24,208 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:36:24,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-14 14:36:24,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 14:36:24,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:36:24,302 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-14 14:36:24,304 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:24,491 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-14 14:36:24,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-10-14 14:36:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:36:24,613 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 14:36:24,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166901321] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:36:24,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 14:36:24,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 22 [2024-10-14 14:36:24,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744131518] [2024-10-14 14:36:24,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:24,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-14 14:36:24,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:24,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-14 14:36:24,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2024-10-14 14:36:24,615 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:24,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 81 transitions, 854 flow. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:24,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:24,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:24,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:25,043 INFO L124 PetriNetUnfolderBase]: 613/1045 cut-off events. [2024-10-14 14:36:25,043 INFO L125 PetriNetUnfolderBase]: For 6548/6548 co-relation queries the response was YES. [2024-10-14 14:36:25,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5496 conditions, 1045 events. 613/1045 cut-off events. For 6548/6548 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4631 event pairs, 303 based on Foata normal form. 1/1045 useless extension candidates. Maximal degree in co-relation 5457. Up to 752 conditions per place. [2024-10-14 14:36:25,049 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 76 selfloop transitions, 32 changer transitions 17/126 dead transitions. [2024-10-14 14:36:25,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 126 transitions, 1422 flow [2024-10-14 14:36:25,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 14:36:25,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-14 14:36:25,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 130 transitions. [2024-10-14 14:36:25,050 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.27310924369747897 [2024-10-14 14:36:25,050 INFO L175 Difference]: Start difference. First operand has 103 places, 81 transitions, 854 flow. Second operand 14 states and 130 transitions. [2024-10-14 14:36:25,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 126 transitions, 1422 flow [2024-10-14 14:36:25,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 126 transitions, 1321 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-10-14 14:36:25,064 INFO L231 Difference]: Finished difference. Result has 110 places, 88 transitions, 980 flow [2024-10-14 14:36:25,065 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=980, PETRI_PLACES=110, PETRI_TRANSITIONS=88} [2024-10-14 14:36:25,065 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 80 predicate places. [2024-10-14 14:36:25,065 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 88 transitions, 980 flow [2024-10-14 14:36:25,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:25,065 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:25,065 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, 1, 1] [2024-10-14 14:36:25,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-10-14 14:36:25,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:25,266 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:25,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:25,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1140190331, now seen corresponding path program 5 times [2024-10-14 14:36:25,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:25,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127917997] [2024-10-14 14:36:25,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:25,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:25,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:26,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:26,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:26,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127917997] [2024-10-14 14:36:26,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127917997] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:26,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95954024] [2024-10-14 14:36:26,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 14:36:26,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:26,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:26,087 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:36:26,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-14 14:36:26,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:36:26,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:36:26,170 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-10-14 14:36:26,172 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:26,522 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 14:36:26,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 47 [2024-10-14 14:36:26,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:26,595 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:36:27,064 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-10-14 14:36:27,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 63 [2024-10-14 14:36:27,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:36:27,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95954024] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:27,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-14 14:36:27,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [14, 13] total 34 [2024-10-14 14:36:27,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651493027] [2024-10-14 14:36:27,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:27,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 14:36:27,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:27,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 14:36:27,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2024-10-14 14:36:27,116 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:27,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 88 transitions, 980 flow. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:27,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:27,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:27,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:27,887 INFO L124 PetriNetUnfolderBase]: 644/1096 cut-off events. [2024-10-14 14:36:27,887 INFO L125 PetriNetUnfolderBase]: For 7247/7247 co-relation queries the response was YES. [2024-10-14 14:36:27,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5905 conditions, 1096 events. 644/1096 cut-off events. For 7247/7247 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4930 event pairs, 110 based on Foata normal form. 1/1097 useless extension candidates. Maximal degree in co-relation 5863. Up to 631 conditions per place. [2024-10-14 14:36:27,893 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 110 selfloop transitions, 56 changer transitions 6/173 dead transitions. [2024-10-14 14:36:27,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 173 transitions, 2092 flow [2024-10-14 14:36:27,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 14:36:27,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-14 14:36:27,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 160 transitions. [2024-10-14 14:36:27,894 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33613445378151263 [2024-10-14 14:36:27,894 INFO L175 Difference]: Start difference. First operand has 110 places, 88 transitions, 980 flow. Second operand 14 states and 160 transitions. [2024-10-14 14:36:27,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 173 transitions, 2092 flow [2024-10-14 14:36:27,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 173 transitions, 1964 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-10-14 14:36:27,916 INFO L231 Difference]: Finished difference. Result has 119 places, 112 transitions, 1427 flow [2024-10-14 14:36:27,916 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1427, PETRI_PLACES=119, PETRI_TRANSITIONS=112} [2024-10-14 14:36:27,916 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 89 predicate places. [2024-10-14 14:36:27,916 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 112 transitions, 1427 flow [2024-10-14 14:36:27,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:27,916 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:27,916 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, 1, 1] [2024-10-14 14:36:27,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-10-14 14:36:28,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:28,117 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:28,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:28,118 INFO L85 PathProgramCache]: Analyzing trace with hash 817515493, now seen corresponding path program 6 times [2024-10-14 14:36:28,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:28,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768236668] [2024-10-14 14:36:28,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:28,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:28,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:28,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:28,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:28,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768236668] [2024-10-14 14:36:28,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768236668] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:28,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193114955] [2024-10-14 14:36:28,870 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 14:36:28,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:28,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:28,872 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:36:28,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-14 14:36:28,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-10-14 14:36:28,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:36:28,961 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-14 14:36:28,962 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:29,110 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-14 14:36:29,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-10-14 14:36:29,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:36:29,187 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 14:36:29,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193114955] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:36:29,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 14:36:29,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2024-10-14 14:36:29,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685149419] [2024-10-14 14:36:29,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:29,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 14:36:29,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:29,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 14:36:29,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-10-14 14:36:29,189 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:29,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 112 transitions, 1427 flow. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:29,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:29,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:29,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:29,553 INFO L124 PetriNetUnfolderBase]: 652/1112 cut-off events. [2024-10-14 14:36:29,553 INFO L125 PetriNetUnfolderBase]: For 6762/6762 co-relation queries the response was YES. [2024-10-14 14:36:29,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6033 conditions, 1112 events. 652/1112 cut-off events. For 6762/6762 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 5034 event pairs, 299 based on Foata normal form. 1/1112 useless extension candidates. Maximal degree in co-relation 5987. Up to 810 conditions per place. [2024-10-14 14:36:29,558 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 89 selfloop transitions, 45 changer transitions 9/144 dead transitions. [2024-10-14 14:36:29,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 144 transitions, 1910 flow [2024-10-14 14:36:29,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 14:36:29,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-14 14:36:29,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-10-14 14:36:29,559 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3205882352941177 [2024-10-14 14:36:29,560 INFO L175 Difference]: Start difference. First operand has 119 places, 112 transitions, 1427 flow. Second operand 10 states and 109 transitions. [2024-10-14 14:36:29,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 144 transitions, 1910 flow [2024-10-14 14:36:29,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 144 transitions, 1824 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-10-14 14:36:29,575 INFO L231 Difference]: Finished difference. Result has 125 places, 111 transitions, 1438 flow [2024-10-14 14:36:29,575 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1438, PETRI_PLACES=125, PETRI_TRANSITIONS=111} [2024-10-14 14:36:29,575 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 95 predicate places. [2024-10-14 14:36:29,575 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 111 transitions, 1438 flow [2024-10-14 14:36:29,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:29,576 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:29,576 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, 1, 1] [2024-10-14 14:36:29,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-10-14 14:36:29,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-14 14:36:29,776 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:29,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:29,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1807646209, now seen corresponding path program 7 times [2024-10-14 14:36:29,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:29,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723491835] [2024-10-14 14:36:29,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:29,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:29,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:30,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:30,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:30,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723491835] [2024-10-14 14:36:30,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723491835] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:30,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473754412] [2024-10-14 14:36:30,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-14 14:36:30,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:30,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:30,481 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:36:30,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-14 14:36:30,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:30,555 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-10-14 14:36:30,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:30,776 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-14 14:36:30,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-10-14 14:36:30,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:30,908 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:36:31,445 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-10-14 14:36:31,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 63 [2024-10-14 14:36:31,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:36:31,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473754412] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:31,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-14 14:36:31,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 13] total 33 [2024-10-14 14:36:31,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076918156] [2024-10-14 14:36:31,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:31,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 14:36:31,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:31,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 14:36:31,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2024-10-14 14:36:31,486 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:31,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 111 transitions, 1438 flow. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:31,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:31,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:31,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:32,383 INFO L124 PetriNetUnfolderBase]: 636/1088 cut-off events. [2024-10-14 14:36:32,383 INFO L125 PetriNetUnfolderBase]: For 6683/6683 co-relation queries the response was YES. [2024-10-14 14:36:32,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5873 conditions, 1088 events. 636/1088 cut-off events. For 6683/6683 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4924 event pairs, 111 based on Foata normal form. 1/1088 useless extension candidates. Maximal degree in co-relation 5825. Up to 626 conditions per place. [2024-10-14 14:36:32,390 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 105 selfloop transitions, 53 changer transitions 12/171 dead transitions. [2024-10-14 14:36:32,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 171 transitions, 2137 flow [2024-10-14 14:36:32,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 14:36:32,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-14 14:36:32,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 157 transitions. [2024-10-14 14:36:32,391 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32983193277310924 [2024-10-14 14:36:32,391 INFO L175 Difference]: Start difference. First operand has 125 places, 111 transitions, 1438 flow. Second operand 14 states and 157 transitions. [2024-10-14 14:36:32,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 171 transitions, 2137 flow [2024-10-14 14:36:32,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 171 transitions, 2049 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-10-14 14:36:32,407 INFO L231 Difference]: Finished difference. Result has 132 places, 108 transitions, 1421 flow [2024-10-14 14:36:32,407 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1362, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1421, PETRI_PLACES=132, PETRI_TRANSITIONS=108} [2024-10-14 14:36:32,407 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 102 predicate places. [2024-10-14 14:36:32,408 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 108 transitions, 1421 flow [2024-10-14 14:36:32,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:32,408 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:32,408 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, 1, 1] [2024-10-14 14:36:32,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-10-14 14:36:32,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-10-14 14:36:32,608 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:32,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:32,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1180733525, now seen corresponding path program 8 times [2024-10-14 14:36:32,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:32,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691682775] [2024-10-14 14:36:32,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:32,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:32,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:33,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:33,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691682775] [2024-10-14 14:36:33,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691682775] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:33,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73783600] [2024-10-14 14:36:33,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:36:33,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:33,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:33,308 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:36:33,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-14 14:36:33,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 14:36:33,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:36:33,394 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-14 14:36:33,396 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:33,517 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-14 14:36:33,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-10-14 14:36:33,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:36:33,660 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 14:36:33,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73783600] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:36:33,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 14:36:33,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2024-10-14 14:36:33,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858969857] [2024-10-14 14:36:33,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:33,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 14:36:33,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:33,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 14:36:33,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-10-14 14:36:33,662 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:33,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 108 transitions, 1421 flow. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:33,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:33,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:33,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:34,070 INFO L124 PetriNetUnfolderBase]: 643/1101 cut-off events. [2024-10-14 14:36:34,070 INFO L125 PetriNetUnfolderBase]: For 6983/6983 co-relation queries the response was YES. [2024-10-14 14:36:34,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6054 conditions, 1101 events. 643/1101 cut-off events. For 6983/6983 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5015 event pairs, 315 based on Foata normal form. 1/1101 useless extension candidates. Maximal degree in co-relation 6008. Up to 818 conditions per place. [2024-10-14 14:36:34,077 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 85 selfloop transitions, 46 changer transitions 9/141 dead transitions. [2024-10-14 14:36:34,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 141 transitions, 1960 flow [2024-10-14 14:36:34,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 14:36:34,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-14 14:36:34,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-10-14 14:36:34,079 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-10-14 14:36:34,079 INFO L175 Difference]: Start difference. First operand has 132 places, 108 transitions, 1421 flow. Second operand 9 states and 102 transitions. [2024-10-14 14:36:34,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 141 transitions, 1960 flow [2024-10-14 14:36:34,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 141 transitions, 1838 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-10-14 14:36:34,101 INFO L231 Difference]: Finished difference. Result has 125 places, 115 transitions, 1532 flow [2024-10-14 14:36:34,101 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1311, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1532, PETRI_PLACES=125, PETRI_TRANSITIONS=115} [2024-10-14 14:36:34,102 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 95 predicate places. [2024-10-14 14:36:34,102 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 115 transitions, 1532 flow [2024-10-14 14:36:34,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:34,102 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:34,102 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, 1, 1] [2024-10-14 14:36:34,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-10-14 14:36:34,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:34,303 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:34,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:34,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1103164641, now seen corresponding path program 9 times [2024-10-14 14:36:34,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:34,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88756529] [2024-10-14 14:36:34,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:34,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:34,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:35,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:35,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:35,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88756529] [2024-10-14 14:36:35,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88756529] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:35,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728111924] [2024-10-14 14:36:35,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:36:35,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:35,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:35,044 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:36:35,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-14 14:36:35,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-10-14 14:36:35,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:36:35,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-14 14:36:35,138 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:35,278 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-14 14:36:35,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-10-14 14:36:35,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:36:35,405 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 14:36:35,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728111924] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:36:35,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 14:36:35,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2024-10-14 14:36:35,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240259529] [2024-10-14 14:36:35,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:35,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 14:36:35,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:35,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 14:36:35,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-10-14 14:36:35,407 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:35,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 115 transitions, 1532 flow. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:35,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:35,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:35,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:35,698 INFO L124 PetriNetUnfolderBase]: 635/1086 cut-off events. [2024-10-14 14:36:35,698 INFO L125 PetriNetUnfolderBase]: For 6951/6951 co-relation queries the response was YES. [2024-10-14 14:36:35,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5952 conditions, 1086 events. 635/1086 cut-off events. For 6951/6951 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4911 event pairs, 313 based on Foata normal form. 1/1086 useless extension candidates. Maximal degree in co-relation 5906. Up to 806 conditions per place. [2024-10-14 14:36:35,704 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 86 selfloop transitions, 44 changer transitions 9/140 dead transitions. [2024-10-14 14:36:35,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 140 transitions, 1922 flow [2024-10-14 14:36:35,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 14:36:35,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-14 14:36:35,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 105 transitions. [2024-10-14 14:36:35,705 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3088235294117647 [2024-10-14 14:36:35,706 INFO L175 Difference]: Start difference. First operand has 125 places, 115 transitions, 1532 flow. Second operand 10 states and 105 transitions. [2024-10-14 14:36:35,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 140 transitions, 1922 flow [2024-10-14 14:36:35,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 140 transitions, 1885 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-10-14 14:36:35,723 INFO L231 Difference]: Finished difference. Result has 132 places, 113 transitions, 1553 flow [2024-10-14 14:36:35,723 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1495, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1553, PETRI_PLACES=132, PETRI_TRANSITIONS=113} [2024-10-14 14:36:35,723 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 102 predicate places. [2024-10-14 14:36:35,723 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 113 transitions, 1553 flow [2024-10-14 14:36:35,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:35,723 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:35,723 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, 1, 1] [2024-10-14 14:36:35,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-10-14 14:36:35,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:35,925 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:35,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:35,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1883086819, now seen corresponding path program 10 times [2024-10-14 14:36:35,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:35,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664110833] [2024-10-14 14:36:35,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:35,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:36,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:36,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664110833] [2024-10-14 14:36:36,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664110833] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:36,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55845445] [2024-10-14 14:36:36,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 14:36:36,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:36,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:36,751 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:36:36,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-14 14:36:36,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 14:36:36,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:36:36,835 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-14 14:36:36,836 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:37,041 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-14 14:36:37,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-10-14 14:36:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:36:37,158 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 14:36:37,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55845445] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:36:37,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 14:36:37,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 22 [2024-10-14 14:36:37,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028998440] [2024-10-14 14:36:37,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:37,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-14 14:36:37,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:37,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-14 14:36:37,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2024-10-14 14:36:37,160 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:37,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 113 transitions, 1553 flow. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:37,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:37,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:37,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:37,503 INFO L124 PetriNetUnfolderBase]: 795/1327 cut-off events. [2024-10-14 14:36:37,504 INFO L125 PetriNetUnfolderBase]: For 10817/10817 co-relation queries the response was YES. [2024-10-14 14:36:37,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7744 conditions, 1327 events. 795/1327 cut-off events. For 10817/10817 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6044 event pairs, 300 based on Foata normal form. 1/1327 useless extension candidates. Maximal degree in co-relation 7697. Up to 874 conditions per place. [2024-10-14 14:36:37,515 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 124 selfloop transitions, 51 changer transitions 13/189 dead transitions. [2024-10-14 14:36:37,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 189 transitions, 2746 flow [2024-10-14 14:36:37,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 14:36:37,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-14 14:36:37,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 112 transitions. [2024-10-14 14:36:37,516 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2994652406417112 [2024-10-14 14:36:37,517 INFO L175 Difference]: Start difference. First operand has 132 places, 113 transitions, 1553 flow. Second operand 11 states and 112 transitions. [2024-10-14 14:36:37,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 189 transitions, 2746 flow [2024-10-14 14:36:37,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 189 transitions, 2623 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-10-14 14:36:37,544 INFO L231 Difference]: Finished difference. Result has 139 places, 131 transitions, 1939 flow [2024-10-14 14:36:37,545 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1458, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1939, PETRI_PLACES=139, PETRI_TRANSITIONS=131} [2024-10-14 14:36:37,545 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 109 predicate places. [2024-10-14 14:36:37,545 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 131 transitions, 1939 flow [2024-10-14 14:36:37,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:37,545 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:37,545 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, 1, 1] [2024-10-14 14:36:37,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-10-14 14:36:37,746 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:37,746 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:37,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:37,746 INFO L85 PathProgramCache]: Analyzing trace with hash -921740937, now seen corresponding path program 11 times [2024-10-14 14:36:37,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:37,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434189106] [2024-10-14 14:36:37,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:37,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:37,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:38,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:38,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:38,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434189106] [2024-10-14 14:36:38,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434189106] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:38,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239580607] [2024-10-14 14:36:38,481 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 14:36:38,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:38,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:38,483 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:36:38,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-14 14:36:38,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:36:38,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:36:38,576 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-10-14 14:36:38,578 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:38,825 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-14 14:36:38,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-10-14 14:36:38,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:38,933 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:36:39,406 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-14 14:36:39,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 122 treesize of output 90 [2024-10-14 14:36:39,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:36:39,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239580607] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:39,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-14 14:36:39,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 13] total 33 [2024-10-14 14:36:39,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610611206] [2024-10-14 14:36:39,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:39,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 14:36:39,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:39,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 14:36:39,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2024-10-14 14:36:39,483 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:39,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 131 transitions, 1939 flow. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:39,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:39,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:39,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:40,640 INFO L124 PetriNetUnfolderBase]: 813/1370 cut-off events. [2024-10-14 14:36:40,641 INFO L125 PetriNetUnfolderBase]: For 13488/13488 co-relation queries the response was YES. [2024-10-14 14:36:40,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8487 conditions, 1370 events. 813/1370 cut-off events. For 13488/13488 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6366 event pairs, 120 based on Foata normal form. 1/1371 useless extension candidates. Maximal degree in co-relation 8434. Up to 667 conditions per place. [2024-10-14 14:36:40,649 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 118 selfloop transitions, 85 changer transitions 14/218 dead transitions. [2024-10-14 14:36:40,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 218 transitions, 3187 flow [2024-10-14 14:36:40,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-14 14:36:40,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-14 14:36:40,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 180 transitions. [2024-10-14 14:36:40,650 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.31141868512110726 [2024-10-14 14:36:40,650 INFO L175 Difference]: Start difference. First operand has 139 places, 131 transitions, 1939 flow. Second operand 17 states and 180 transitions. [2024-10-14 14:36:40,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 218 transitions, 3187 flow [2024-10-14 14:36:40,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 218 transitions, 3112 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-10-14 14:36:40,681 INFO L231 Difference]: Finished difference. Result has 158 places, 154 transitions, 2563 flow [2024-10-14 14:36:40,681 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1880, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2563, PETRI_PLACES=158, PETRI_TRANSITIONS=154} [2024-10-14 14:36:40,681 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 128 predicate places. [2024-10-14 14:36:40,681 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 154 transitions, 2563 flow [2024-10-14 14:36:40,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:40,681 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:40,681 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, 1, 1] [2024-10-14 14:36:40,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-10-14 14:36:40,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-10-14 14:36:40,884 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:40,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:40,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1394058961, now seen corresponding path program 12 times [2024-10-14 14:36:40,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:40,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141116040] [2024-10-14 14:36:40,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:40,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:40,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:41,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:41,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:41,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141116040] [2024-10-14 14:36:41,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141116040] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:41,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17207245] [2024-10-14 14:36:41,722 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 14:36:41,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:41,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:41,724 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:36:41,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-14 14:36:41,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-10-14 14:36:41,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:36:41,805 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-14 14:36:41,806 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:41,944 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-14 14:36:41,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-10-14 14:36:42,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:36:42,005 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 14:36:42,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17207245] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:36:42,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 14:36:42,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2024-10-14 14:36:42,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128165973] [2024-10-14 14:36:42,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:42,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 14:36:42,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:42,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 14:36:42,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2024-10-14 14:36:42,011 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:42,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 154 transitions, 2563 flow. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:42,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:42,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:42,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:42,358 INFO L124 PetriNetUnfolderBase]: 824/1387 cut-off events. [2024-10-14 14:36:42,358 INFO L125 PetriNetUnfolderBase]: For 14810/14810 co-relation queries the response was YES. [2024-10-14 14:36:42,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9074 conditions, 1387 events. 824/1387 cut-off events. For 14810/14810 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6447 event pairs, 301 based on Foata normal form. 1/1387 useless extension candidates. Maximal degree in co-relation 9014. Up to 921 conditions per place. [2024-10-14 14:36:42,367 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 125 selfloop transitions, 65 changer transitions 7/198 dead transitions. [2024-10-14 14:36:42,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 198 transitions, 3381 flow [2024-10-14 14:36:42,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 14:36:42,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-14 14:36:42,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-10-14 14:36:42,368 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3176470588235294 [2024-10-14 14:36:42,368 INFO L175 Difference]: Start difference. First operand has 158 places, 154 transitions, 2563 flow. Second operand 10 states and 108 transitions. [2024-10-14 14:36:42,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 198 transitions, 3381 flow [2024-10-14 14:36:42,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 198 transitions, 3139 flow, removed 93 selfloop flow, removed 4 redundant places. [2024-10-14 14:36:42,406 INFO L231 Difference]: Finished difference. Result has 163 places, 166 transitions, 2692 flow [2024-10-14 14:36:42,406 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2371, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2692, PETRI_PLACES=163, PETRI_TRANSITIONS=166} [2024-10-14 14:36:42,406 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 133 predicate places. [2024-10-14 14:36:42,406 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 166 transitions, 2692 flow [2024-10-14 14:36:42,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:42,407 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:42,407 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, 1, 1] [2024-10-14 14:36:42,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-10-14 14:36:42,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-10-14 14:36:42,607 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:42,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:42,608 INFO L85 PathProgramCache]: Analyzing trace with hash -411412301, now seen corresponding path program 13 times [2024-10-14 14:36:42,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:42,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434448280] [2024-10-14 14:36:42,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:42,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:42,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:43,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:43,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:43,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434448280] [2024-10-14 14:36:43,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434448280] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:43,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245804282] [2024-10-14 14:36:43,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-14 14:36:43,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:43,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:43,275 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:36:43,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-10-14 14:36:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:43,365 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-10-14 14:36:43,366 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:43,616 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-14 14:36:43,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-10-14 14:36:43,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:43,769 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:36:44,186 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-14 14:36:44,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 71 [2024-10-14 14:36:44,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:36:44,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245804282] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:44,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-14 14:36:44,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 13] total 33 [2024-10-14 14:36:44,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237271352] [2024-10-14 14:36:44,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:44,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 14:36:44,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:44,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 14:36:44,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2024-10-14 14:36:44,244 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:44,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 166 transitions, 2692 flow. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:44,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:44,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:44,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:45,112 INFO L124 PetriNetUnfolderBase]: 832/1414 cut-off events. [2024-10-14 14:36:45,113 INFO L125 PetriNetUnfolderBase]: For 14226/14226 co-relation queries the response was YES. [2024-10-14 14:36:45,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9065 conditions, 1414 events. 832/1414 cut-off events. For 14226/14226 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6703 event pairs, 126 based on Foata normal form. 1/1414 useless extension candidates. Maximal degree in co-relation 9004. Up to 697 conditions per place. [2024-10-14 14:36:45,122 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 118 selfloop transitions, 95 changer transitions 9/223 dead transitions. [2024-10-14 14:36:45,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 223 transitions, 3506 flow [2024-10-14 14:36:45,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-14 14:36:45,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-14 14:36:45,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 171 transitions. [2024-10-14 14:36:45,123 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.31433823529411764 [2024-10-14 14:36:45,123 INFO L175 Difference]: Start difference. First operand has 163 places, 166 transitions, 2692 flow. Second operand 16 states and 171 transitions. [2024-10-14 14:36:45,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 223 transitions, 3506 flow [2024-10-14 14:36:45,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 223 transitions, 3444 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-10-14 14:36:45,164 INFO L231 Difference]: Finished difference. Result has 179 places, 169 transitions, 2924 flow [2024-10-14 14:36:45,164 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2633, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2924, PETRI_PLACES=179, PETRI_TRANSITIONS=169} [2024-10-14 14:36:45,164 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 149 predicate places. [2024-10-14 14:36:45,164 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 169 transitions, 2924 flow [2024-10-14 14:36:45,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:45,164 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:45,165 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, 1, 1] [2024-10-14 14:36:45,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-10-14 14:36:45,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-10-14 14:36:45,365 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:45,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:45,366 INFO L85 PathProgramCache]: Analyzing trace with hash -799990367, now seen corresponding path program 14 times [2024-10-14 14:36:45,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:45,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965240844] [2024-10-14 14:36:45,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:45,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:45,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:46,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:46,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:46,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965240844] [2024-10-14 14:36:46,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965240844] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:46,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251161199] [2024-10-14 14:36:46,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:36:46,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:46,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:46,141 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:36:46,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-10-14 14:36:46,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 14:36:46,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:36:46,219 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-14 14:36:46,220 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:46,353 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-14 14:36:46,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-10-14 14:36:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:36:46,415 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 14:36:46,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251161199] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:36:46,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 14:36:46,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2024-10-14 14:36:46,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243370503] [2024-10-14 14:36:46,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:46,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 14:36:46,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:46,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 14:36:46,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2024-10-14 14:36:46,417 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:46,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 169 transitions, 2924 flow. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:46,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:46,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:46,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:46,858 INFO L124 PetriNetUnfolderBase]: 858/1459 cut-off events. [2024-10-14 14:36:46,858 INFO L125 PetriNetUnfolderBase]: For 15703/15703 co-relation queries the response was YES. [2024-10-14 14:36:46,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9658 conditions, 1459 events. 858/1459 cut-off events. For 15703/15703 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6975 event pairs, 313 based on Foata normal form. 1/1459 useless extension candidates. Maximal degree in co-relation 9594. Up to 949 conditions per place. [2024-10-14 14:36:46,869 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 129 selfloop transitions, 73 changer transitions 10/213 dead transitions. [2024-10-14 14:36:46,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 213 transitions, 3707 flow [2024-10-14 14:36:46,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 14:36:46,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-14 14:36:46,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 122 transitions. [2024-10-14 14:36:46,870 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.29901960784313725 [2024-10-14 14:36:46,871 INFO L175 Difference]: Start difference. First operand has 179 places, 169 transitions, 2924 flow. Second operand 12 states and 122 transitions. [2024-10-14 14:36:46,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 213 transitions, 3707 flow [2024-10-14 14:36:46,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 213 transitions, 3547 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-10-14 14:36:46,922 INFO L231 Difference]: Finished difference. Result has 186 places, 178 transitions, 3109 flow [2024-10-14 14:36:46,922 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2771, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3109, PETRI_PLACES=186, PETRI_TRANSITIONS=178} [2024-10-14 14:36:46,923 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 156 predicate places. [2024-10-14 14:36:46,923 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 178 transitions, 3109 flow [2024-10-14 14:36:46,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:46,923 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:46,923 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, 1, 1] [2024-10-14 14:36:46,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-10-14 14:36:47,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:47,124 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:47,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:47,124 INFO L85 PathProgramCache]: Analyzing trace with hash 14373931, now seen corresponding path program 15 times [2024-10-14 14:36:47,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:47,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644460078] [2024-10-14 14:36:47,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:47,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:47,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:47,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:47,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644460078] [2024-10-14 14:36:47,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644460078] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:47,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840172577] [2024-10-14 14:36:47,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:36:47,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:47,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:47,850 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:36:47,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-10-14 14:36:47,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-10-14 14:36:47,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:36:47,939 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-14 14:36:47,940 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:48,086 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-14 14:36:48,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-10-14 14:36:48,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:36:48,154 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 14:36:48,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840172577] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:36:48,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 14:36:48,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2024-10-14 14:36:48,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188473717] [2024-10-14 14:36:48,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:48,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 14:36:48,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:48,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 14:36:48,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2024-10-14 14:36:48,155 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:48,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 178 transitions, 3109 flow. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:48,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:48,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:48,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:48,641 INFO L124 PetriNetUnfolderBase]: 916/1593 cut-off events. [2024-10-14 14:36:48,641 INFO L125 PetriNetUnfolderBase]: For 15934/15934 co-relation queries the response was YES. [2024-10-14 14:36:48,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10275 conditions, 1593 events. 916/1593 cut-off events. For 15934/15934 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8007 event pairs, 285 based on Foata normal form. 1/1593 useless extension candidates. Maximal degree in co-relation 10206. Up to 815 conditions per place. [2024-10-14 14:36:48,653 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 149 selfloop transitions, 66 changer transitions 17/233 dead transitions. [2024-10-14 14:36:48,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 233 transitions, 3938 flow [2024-10-14 14:36:48,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 14:36:48,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-14 14:36:48,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 134 transitions. [2024-10-14 14:36:48,654 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3031674208144796 [2024-10-14 14:36:48,654 INFO L175 Difference]: Start difference. First operand has 186 places, 178 transitions, 3109 flow. Second operand 13 states and 134 transitions. [2024-10-14 14:36:48,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 233 transitions, 3938 flow [2024-10-14 14:36:48,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 233 transitions, 3870 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-10-14 14:36:48,719 INFO L231 Difference]: Finished difference. Result has 199 places, 179 transitions, 3233 flow [2024-10-14 14:36:48,719 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3046, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3233, PETRI_PLACES=199, PETRI_TRANSITIONS=179} [2024-10-14 14:36:48,719 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 169 predicate places. [2024-10-14 14:36:48,720 INFO L471 AbstractCegarLoop]: Abstraction has has 199 places, 179 transitions, 3233 flow [2024-10-14 14:36:48,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:48,720 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:48,720 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, 1, 1] [2024-10-14 14:36:48,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-10-14 14:36:48,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-10-14 14:36:48,920 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:48,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:48,921 INFO L85 PathProgramCache]: Analyzing trace with hash -845976283, now seen corresponding path program 16 times [2024-10-14 14:36:48,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:48,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054433923] [2024-10-14 14:36:48,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:48,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:49,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:49,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:49,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054433923] [2024-10-14 14:36:49,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054433923] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:49,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276713992] [2024-10-14 14:36:49,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 14:36:49,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:49,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:49,575 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:36:49,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-10-14 14:36:49,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 14:36:49,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:36:49,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-14 14:36:49,659 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:49,950 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-14 14:36:49,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-10-14 14:36:50,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:36:50,010 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:36:50,356 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-14 14:36:50,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 71 [2024-10-14 14:36:50,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:36:50,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276713992] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:50,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-14 14:36:50,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 12] total 32 [2024-10-14 14:36:50,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839097914] [2024-10-14 14:36:50,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:50,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 14:36:50,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:50,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 14:36:50,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2024-10-14 14:36:50,411 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:50,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 179 transitions, 3233 flow. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:50,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:50,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:50,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:51,207 INFO L124 PetriNetUnfolderBase]: 928/1619 cut-off events. [2024-10-14 14:36:51,207 INFO L125 PetriNetUnfolderBase]: For 18234/18234 co-relation queries the response was YES. [2024-10-14 14:36:51,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10584 conditions, 1619 events. 928/1619 cut-off events. For 18234/18234 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8214 event pairs, 158 based on Foata normal form. 1/1619 useless extension candidates. Maximal degree in co-relation 10511. Up to 887 conditions per place. [2024-10-14 14:36:51,217 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 121 selfloop transitions, 111 changer transitions 8/241 dead transitions. [2024-10-14 14:36:51,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 241 transitions, 4332 flow [2024-10-14 14:36:51,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 14:36:51,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-14 14:36:51,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 164 transitions. [2024-10-14 14:36:51,219 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3445378151260504 [2024-10-14 14:36:51,219 INFO L175 Difference]: Start difference. First operand has 199 places, 179 transitions, 3233 flow. Second operand 14 states and 164 transitions. [2024-10-14 14:36:51,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 241 transitions, 4332 flow [2024-10-14 14:36:51,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 241 transitions, 4156 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-10-14 14:36:51,274 INFO L231 Difference]: Finished difference. Result has 203 places, 194 transitions, 3667 flow [2024-10-14 14:36:51,274 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3083, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3667, PETRI_PLACES=203, PETRI_TRANSITIONS=194} [2024-10-14 14:36:51,275 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 173 predicate places. [2024-10-14 14:36:51,275 INFO L471 AbstractCegarLoop]: Abstraction has has 203 places, 194 transitions, 3667 flow [2024-10-14 14:36:51,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:51,275 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:51,275 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, 1, 1] [2024-10-14 14:36:51,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-10-14 14:36:51,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-10-14 14:36:51,476 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:51,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:51,476 INFO L85 PathProgramCache]: Analyzing trace with hash 480762405, now seen corresponding path program 17 times [2024-10-14 14:36:51,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:51,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779455803] [2024-10-14 14:36:51,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:51,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:52,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:52,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:52,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779455803] [2024-10-14 14:36:52,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779455803] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:52,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611024466] [2024-10-14 14:36:52,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 14:36:52,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:52,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:52,157 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:36:52,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-10-14 14:36:52,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:36:52,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:36:52,239 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-10-14 14:36:52,240 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:52,525 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 14:36:52,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 47 [2024-10-14 14:36:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:52,626 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:36:52,999 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-14 14:36:52,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 71 [2024-10-14 14:36:53,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:36:53,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611024466] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:53,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-14 14:36:53,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 13] total 33 [2024-10-14 14:36:53,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050924975] [2024-10-14 14:36:53,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:53,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 14:36:53,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:53,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 14:36:53,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2024-10-14 14:36:53,058 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:53,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 194 transitions, 3667 flow. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:53,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:53,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:53,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:53,786 INFO L124 PetriNetUnfolderBase]: 913/1586 cut-off events. [2024-10-14 14:36:53,786 INFO L125 PetriNetUnfolderBase]: For 18113/18113 co-relation queries the response was YES. [2024-10-14 14:36:53,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10644 conditions, 1586 events. 913/1586 cut-off events. For 18113/18113 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7971 event pairs, 150 based on Foata normal form. 1/1586 useless extension candidates. Maximal degree in co-relation 10572. Up to 852 conditions per place. [2024-10-14 14:36:53,798 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 114 selfloop transitions, 107 changer transitions 15/237 dead transitions. [2024-10-14 14:36:53,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 237 transitions, 4365 flow [2024-10-14 14:36:53,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 14:36:53,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-14 14:36:53,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 155 transitions. [2024-10-14 14:36:53,799 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32563025210084034 [2024-10-14 14:36:53,799 INFO L175 Difference]: Start difference. First operand has 203 places, 194 transitions, 3667 flow. Second operand 14 states and 155 transitions. [2024-10-14 14:36:53,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 237 transitions, 4365 flow [2024-10-14 14:36:53,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 237 transitions, 4201 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-10-14 14:36:53,887 INFO L231 Difference]: Finished difference. Result has 209 places, 188 transitions, 3608 flow [2024-10-14 14:36:53,888 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3513, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3608, PETRI_PLACES=209, PETRI_TRANSITIONS=188} [2024-10-14 14:36:53,888 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 179 predicate places. [2024-10-14 14:36:53,888 INFO L471 AbstractCegarLoop]: Abstraction has has 209 places, 188 transitions, 3608 flow [2024-10-14 14:36:53,888 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:53,888 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:53,889 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, 1, 1] [2024-10-14 14:36:53,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-10-14 14:36:54,089 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-10-14 14:36:54,089 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:54,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:54,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1544622659, now seen corresponding path program 18 times [2024-10-14 14:36:54,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:54,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206457181] [2024-10-14 14:36:54,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:54,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:54,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:54,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:54,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206457181] [2024-10-14 14:36:54,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206457181] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:54,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277259651] [2024-10-14 14:36:54,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 14:36:54,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:54,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:54,662 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:36:54,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-10-14 14:36:54,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-10-14 14:36:54,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:36:54,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-14 14:36:54,746 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:54,843 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-14 14:36:54,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-10-14 14:36:54,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:36:54,927 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 14:36:54,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277259651] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:36:54,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 14:36:54,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2024-10-14 14:36:54,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594557931] [2024-10-14 14:36:54,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:54,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 14:36:54,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:54,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 14:36:54,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2024-10-14 14:36:54,929 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:54,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 188 transitions, 3608 flow. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:54,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:54,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:54,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:55,324 INFO L124 PetriNetUnfolderBase]: 897/1556 cut-off events. [2024-10-14 14:36:55,324 INFO L125 PetriNetUnfolderBase]: For 17587/17587 co-relation queries the response was YES. [2024-10-14 14:36:55,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10467 conditions, 1556 events. 897/1556 cut-off events. For 17587/17587 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7690 event pairs, 359 based on Foata normal form. 1/1556 useless extension candidates. Maximal degree in co-relation 10396. Up to 1043 conditions per place. [2024-10-14 14:36:55,336 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 127 selfloop transitions, 74 changer transitions 15/217 dead transitions. [2024-10-14 14:36:55,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 217 transitions, 4159 flow [2024-10-14 14:36:55,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 14:36:55,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-14 14:36:55,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 113 transitions. [2024-10-14 14:36:55,337 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.30213903743315507 [2024-10-14 14:36:55,337 INFO L175 Difference]: Start difference. First operand has 209 places, 188 transitions, 3608 flow. Second operand 11 states and 113 transitions. [2024-10-14 14:36:55,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 217 transitions, 4159 flow [2024-10-14 14:36:55,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 217 transitions, 3872 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-10-14 14:36:55,395 INFO L231 Difference]: Finished difference. Result has 202 places, 182 transitions, 3348 flow [2024-10-14 14:36:55,396 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3321, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3348, PETRI_PLACES=202, PETRI_TRANSITIONS=182} [2024-10-14 14:36:55,396 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 172 predicate places. [2024-10-14 14:36:55,396 INFO L471 AbstractCegarLoop]: Abstraction has has 202 places, 182 transitions, 3348 flow [2024-10-14 14:36:55,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:55,396 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:55,396 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, 1, 1] [2024-10-14 14:36:55,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-10-14 14:36:55,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-10-14 14:36:55,597 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:55,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:55,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1481111973, now seen corresponding path program 19 times [2024-10-14 14:36:55,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:55,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585744165] [2024-10-14 14:36:55,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:55,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:55,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:56,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:56,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585744165] [2024-10-14 14:36:56,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585744165] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:56,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152769941] [2024-10-14 14:36:56,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-14 14:36:56,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:56,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:56,253 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:36:56,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-10-14 14:36:56,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:56,351 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-10-14 14:36:56,353 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:56,646 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-14 14:36:56,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-10-14 14:36:56,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:56,758 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:36:57,149 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-14 14:36:57,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 71 [2024-10-14 14:36:57,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:36:57,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152769941] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:57,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-14 14:36:57,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 13] total 33 [2024-10-14 14:36:57,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601027185] [2024-10-14 14:36:57,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:57,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 14:36:57,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:57,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 14:36:57,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2024-10-14 14:36:57,204 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:57,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 182 transitions, 3348 flow. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:57,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:57,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:57,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:58,108 INFO L124 PetriNetUnfolderBase]: 881/1526 cut-off events. [2024-10-14 14:36:58,108 INFO L125 PetriNetUnfolderBase]: For 17100/17100 co-relation queries the response was YES. [2024-10-14 14:36:58,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10040 conditions, 1526 events. 881/1526 cut-off events. For 17100/17100 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7526 event pairs, 150 based on Foata normal form. 1/1526 useless extension candidates. Maximal degree in co-relation 9969. Up to 824 conditions per place. [2024-10-14 14:36:58,125 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 125 selfloop transitions, 99 changer transitions 10/235 dead transitions. [2024-10-14 14:36:58,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 235 transitions, 4069 flow [2024-10-14 14:36:58,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-14 14:36:58,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-14 14:36:58,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 174 transitions. [2024-10-14 14:36:58,126 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.31985294117647056 [2024-10-14 14:36:58,127 INFO L175 Difference]: Start difference. First operand has 202 places, 182 transitions, 3348 flow. Second operand 16 states and 174 transitions. [2024-10-14 14:36:58,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 235 transitions, 4069 flow [2024-10-14 14:36:58,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 235 transitions, 3820 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-10-14 14:36:58,180 INFO L231 Difference]: Finished difference. Result has 203 places, 180 transitions, 3262 flow [2024-10-14 14:36:58,180 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3102, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3262, PETRI_PLACES=203, PETRI_TRANSITIONS=180} [2024-10-14 14:36:58,180 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 173 predicate places. [2024-10-14 14:36:58,180 INFO L471 AbstractCegarLoop]: Abstraction has has 203 places, 180 transitions, 3262 flow [2024-10-14 14:36:58,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:58,181 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:58,181 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, 1, 1] [2024-10-14 14:36:58,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-10-14 14:36:58,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-10-14 14:36:58,381 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:58,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:58,382 INFO L85 PathProgramCache]: Analyzing trace with hash 453951841, now seen corresponding path program 20 times [2024-10-14 14:36:58,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:58,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317683646] [2024-10-14 14:36:58,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:58,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:58,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:36:58,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:36:58,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:36:58,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317683646] [2024-10-14 14:36:58,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317683646] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:36:58,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184532680] [2024-10-14 14:36:58,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:36:58,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:58,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:36:58,896 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:36:58,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-10-14 14:36:58,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 14:36:58,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:36:58,985 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-14 14:36:58,986 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:36:59,123 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-14 14:36:59,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 52 [2024-10-14 14:36:59,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:36:59,193 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 14:36:59,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184532680] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:36:59,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 14:36:59,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2024-10-14 14:36:59,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639497026] [2024-10-14 14:36:59,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:36:59,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 14:36:59,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:36:59,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 14:36:59,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-10-14 14:36:59,195 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-10-14 14:36:59,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 180 transitions, 3262 flow. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:59,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:36:59,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-10-14 14:36:59,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:36:59,572 INFO L124 PetriNetUnfolderBase]: 869/1496 cut-off events. [2024-10-14 14:36:59,573 INFO L125 PetriNetUnfolderBase]: For 15099/15099 co-relation queries the response was YES. [2024-10-14 14:36:59,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9866 conditions, 1496 events. 869/1496 cut-off events. For 15099/15099 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7252 event pairs, 356 based on Foata normal form. 1/1496 useless extension candidates. Maximal degree in co-relation 9796. Up to 1050 conditions per place. [2024-10-14 14:36:59,590 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 133 selfloop transitions, 66 changer transitions 10/210 dead transitions. [2024-10-14 14:36:59,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 210 transitions, 3803 flow [2024-10-14 14:36:59,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 14:36:59,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-14 14:36:59,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-10-14 14:36:59,592 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3205882352941177 [2024-10-14 14:36:59,592 INFO L175 Difference]: Start difference. First operand has 203 places, 180 transitions, 3262 flow. Second operand 10 states and 109 transitions. [2024-10-14 14:36:59,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 210 transitions, 3803 flow [2024-10-14 14:36:59,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 210 transitions, 3688 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-10-14 14:36:59,660 INFO L231 Difference]: Finished difference. Result has 201 places, 178 transitions, 3256 flow [2024-10-14 14:36:59,660 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3147, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3256, PETRI_PLACES=201, PETRI_TRANSITIONS=178} [2024-10-14 14:36:59,660 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 171 predicate places. [2024-10-14 14:36:59,661 INFO L471 AbstractCegarLoop]: Abstraction has has 201 places, 178 transitions, 3256 flow [2024-10-14 14:36:59,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:36:59,661 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:36:59,661 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, 1, 1] [2024-10-14 14:36:59,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-10-14 14:36:59,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:36:59,861 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:36:59,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:36:59,862 INFO L85 PathProgramCache]: Analyzing trace with hash -771391655, now seen corresponding path program 21 times [2024-10-14 14:36:59,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:36:59,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880073686] [2024-10-14 14:36:59,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:36:59,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:36:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:37:00,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:37:00,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:37:00,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880073686] [2024-10-14 14:37:00,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880073686] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:37:00,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911270844] [2024-10-14 14:37:00,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:37:00,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:37:00,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:37:00,538 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:37:00,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process