./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d 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/popl20-more-inc-subseq.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 69f7b2e4777088b02df05d348ae0a210dcd9618a97428b10acd3ef63d9199610 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 07:13:15,878 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 07:13:15,937 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 07:13:15,943 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 07:13:15,944 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 07:13:15,962 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 07:13:15,963 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 07:13:15,963 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 07:13:15,964 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 07:13:15,964 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 07:13:15,964 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 07:13:15,964 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 07:13:15,965 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 07:13:15,965 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 07:13:15,965 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 07:13:15,966 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 07:13:15,967 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 07:13:15,969 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 07:13:15,970 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 07:13:15,970 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 07:13:15,970 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 07:13:15,970 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 07:13:15,971 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 07:13:15,971 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 07:13:15,971 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 07:13:15,971 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 07:13:15,971 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 07:13:15,971 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 07:13:15,972 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 07:13:15,972 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 07:13:15,972 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 07:13:15,972 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 07:13:15,972 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:13:15,972 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 07:13:15,973 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 07:13:15,973 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 07:13:15,973 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 07:13:15,973 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 07:13:15,973 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 07:13:15,973 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 07:13:15,974 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 07:13:15,976 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 07:13:15,976 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69f7b2e4777088b02df05d348ae0a210dcd9618a97428b10acd3ef63d9199610 [2024-10-13 07:13:16,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 07:13:16,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 07:13:16,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 07:13:16,187 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 07:13:16,187 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 07:13:16,188 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2024-10-13 07:13:17,514 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 07:13:17,674 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 07:13:17,674 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2024-10-13 07:13:17,682 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf69b9144/e069af9b801c43b2a40bf8fef738dfeb/FLAGef19db1ad [2024-10-13 07:13:17,694 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf69b9144/e069af9b801c43b2a40bf8fef738dfeb [2024-10-13 07:13:17,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 07:13:17,697 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 07:13:17,698 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 07:13:17,698 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 07:13:17,703 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 07:13:17,704 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:13:17" (1/1) ... [2024-10-13 07:13:17,704 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@385a103b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:17, skipping insertion in model container [2024-10-13 07:13:17,704 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:13:17" (1/1) ... [2024-10-13 07:13:17,722 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 07:13:17,874 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c[2950,2963] [2024-10-13 07:13:17,883 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:13:17,889 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 07:13:17,910 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c[2950,2963] [2024-10-13 07:13:17,912 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:13:17,927 INFO L204 MainTranslator]: Completed translation [2024-10-13 07:13:17,928 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:17 WrapperNode [2024-10-13 07:13:17,928 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 07:13:17,929 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 07:13:17,929 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 07:13:17,929 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 07:13:17,935 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:17" (1/1) ... [2024-10-13 07:13:17,942 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:17" (1/1) ... [2024-10-13 07:13:17,968 INFO L138 Inliner]: procedures = 23, calls = 35, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 187 [2024-10-13 07:13:17,968 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 07:13:17,969 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 07:13:17,972 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 07:13:17,972 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 07:13:17,987 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:17" (1/1) ... [2024-10-13 07:13:17,987 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:17" (1/1) ... [2024-10-13 07:13:17,989 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:17" (1/1) ... [2024-10-13 07:13:18,001 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 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]. [2024-10-13 07:13:18,002 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:17" (1/1) ... [2024-10-13 07:13:18,002 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:17" (1/1) ... [2024-10-13 07:13:18,007 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:17" (1/1) ... [2024-10-13 07:13:18,009 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:17" (1/1) ... [2024-10-13 07:13:18,010 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:17" (1/1) ... [2024-10-13 07:13:18,011 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:17" (1/1) ... [2024-10-13 07:13:18,013 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 07:13:18,014 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 07:13:18,014 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 07:13:18,014 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 07:13:18,015 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:17" (1/1) ... [2024-10-13 07:13:18,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:13:18,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:13:18,052 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) [2024-10-13 07:13:18,055 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 [2024-10-13 07:13:18,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 07:13:18,115 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-13 07:13:18,115 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-13 07:13:18,115 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-13 07:13:18,116 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-13 07:13:18,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 07:13:18,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 07:13:18,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 07:13:18,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 07:13:18,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-13 07:13:18,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-13 07:13:18,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-13 07:13:18,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 07:13:18,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 07:13:18,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 07:13:18,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 07:13:18,118 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 07:13:18,231 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 07:13:18,233 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 07:13:18,527 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 07:13:18,529 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 07:13:18,764 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 07:13:18,764 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-13 07:13:18,765 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:13:18 BoogieIcfgContainer [2024-10-13 07:13:18,765 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 07:13:18,767 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 07:13:18,767 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 07:13:18,770 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 07:13:18,770 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:13:17" (1/3) ... [2024-10-13 07:13:18,773 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f674038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:13:18, skipping insertion in model container [2024-10-13 07:13:18,773 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:17" (2/3) ... [2024-10-13 07:13:18,773 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f674038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:13:18, skipping insertion in model container [2024-10-13 07:13:18,773 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:13:18" (3/3) ... [2024-10-13 07:13:18,775 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-inc-subseq.wvr.c [2024-10-13 07:13:18,789 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 07:13:18,789 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 07:13:18,789 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 07:13:18,829 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-13 07:13:18,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 31 transitions, 76 flow [2024-10-13 07:13:18,883 INFO L124 PetriNetUnfolderBase]: 5/29 cut-off events. [2024-10-13 07:13:18,886 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 07:13:18,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 29 events. 5/29 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 43 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2024-10-13 07:13:18,889 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 31 transitions, 76 flow [2024-10-13 07:13:18,891 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 28 transitions, 68 flow [2024-10-13 07:13:18,901 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 07:13:18,907 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;@1cfb95a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 07:13:18,907 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-13 07:13:18,918 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 07:13:18,918 INFO L124 PetriNetUnfolderBase]: 5/27 cut-off events. [2024-10-13 07:13:18,918 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 07:13:18,919 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:13:18,919 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:13:18,920 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:13:18,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:13:18,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1103126271, now seen corresponding path program 1 times [2024-10-13 07:13:18,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:13:18,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139947551] [2024-10-13 07:13:18,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:13:18,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:13:19,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:13:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:13:19,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:13:19,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139947551] [2024-10-13 07:13:19,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139947551] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:13:19,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:13:19,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 07:13:19,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397055159] [2024-10-13 07:13:19,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:13:19,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:13:19,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:13:19,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:13:19,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:13:19,276 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-10-13 07:13:19,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 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) [2024-10-13 07:13:19,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:13:19,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-10-13 07:13:19,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:13:19,405 INFO L124 PetriNetUnfolderBase]: 202/345 cut-off events. [2024-10-13 07:13:19,406 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-10-13 07:13:19,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697 conditions, 345 events. 202/345 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1377 event pairs, 51 based on Foata normal form. 0/297 useless extension candidates. Maximal degree in co-relation 651. Up to 188 conditions per place. [2024-10-13 07:13:19,411 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 31 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2024-10-13 07:13:19,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 40 transitions, 163 flow [2024-10-13 07:13:19,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:13:19,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:13:19,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-10-13 07:13:19,451 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5403225806451613 [2024-10-13 07:13:19,453 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 68 flow. Second operand 4 states and 67 transitions. [2024-10-13 07:13:19,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 40 transitions, 163 flow [2024-10-13 07:13:19,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 40 transitions, 153 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-13 07:13:19,466 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 74 flow [2024-10-13 07:13:19,470 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2024-10-13 07:13:19,474 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 0 predicate places. [2024-10-13 07:13:19,477 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 74 flow [2024-10-13 07:13:19,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 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) [2024-10-13 07:13:19,478 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:13:19,481 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:13:19,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 07:13:19,481 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:13:19,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:13:19,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1933867166, now seen corresponding path program 1 times [2024-10-13 07:13:19,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:13:19,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435994625] [2024-10-13 07:13:19,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:13:19,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:13:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:13:19,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:13:19,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:13:19,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435994625] [2024-10-13 07:13:19,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435994625] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:13:19,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:13:19,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 07:13:19,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345242114] [2024-10-13 07:13:19,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:13:19,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 07:13:19,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:13:19,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 07:13:19,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 07:13:19,643 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-10-13 07:13:19,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:13:19,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:13:19,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-10-13 07:13:19,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:13:19,704 INFO L124 PetriNetUnfolderBase]: 202/370 cut-off events. [2024-10-13 07:13:19,704 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-10-13 07:13:19,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 748 conditions, 370 events. 202/370 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1558 event pairs, 126 based on Foata normal form. 1/335 useless extension candidates. Maximal degree in co-relation 285. Up to 320 conditions per place. [2024-10-13 07:13:19,707 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 22 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2024-10-13 07:13:19,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 30 transitions, 124 flow [2024-10-13 07:13:19,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 07:13:19,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 07:13:19,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2024-10-13 07:13:19,709 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-10-13 07:13:19,709 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 74 flow. Second operand 3 states and 48 transitions. [2024-10-13 07:13:19,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 30 transitions, 124 flow [2024-10-13 07:13:19,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 30 transitions, 120 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 07:13:19,710 INFO L231 Difference]: Finished difference. Result has 31 places, 30 transitions, 82 flow [2024-10-13 07:13:19,711 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=31, PETRI_TRANSITIONS=30} [2024-10-13 07:13:19,711 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-10-13 07:13:19,711 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 30 transitions, 82 flow [2024-10-13 07:13:19,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:13:19,711 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:13:19,711 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] [2024-10-13 07:13:19,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 07:13:19,712 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:13:19,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:13:19,713 INFO L85 PathProgramCache]: Analyzing trace with hash -720044749, now seen corresponding path program 1 times [2024-10-13 07:13:19,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:13:19,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335314475] [2024-10-13 07:13:19,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:13:19,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:13:19,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:13:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:13:19,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:13:19,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335314475] [2024-10-13 07:13:19,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335314475] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:13:19,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:13:19,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 07:13:19,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865746775] [2024-10-13 07:13:19,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:13:19,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 07:13:19,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:13:19,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 07:13:19,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 07:13:19,832 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-10-13 07:13:19,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 30 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:13:19,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:13:19,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-10-13 07:13:19,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:13:19,936 INFO L124 PetriNetUnfolderBase]: 257/478 cut-off events. [2024-10-13 07:13:19,937 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-10-13 07:13:19,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 967 conditions, 478 events. 257/478 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2116 event pairs, 94 based on Foata normal form. 1/437 useless extension candidates. Maximal degree in co-relation 951. Up to 216 conditions per place. [2024-10-13 07:13:19,941 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 34 selfloop transitions, 2 changer transitions 2/44 dead transitions. [2024-10-13 07:13:19,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 44 transitions, 194 flow [2024-10-13 07:13:19,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 07:13:19,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 07:13:19,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-10-13 07:13:19,943 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6451612903225806 [2024-10-13 07:13:19,943 INFO L175 Difference]: Start difference. First operand has 31 places, 30 transitions, 82 flow. Second operand 3 states and 60 transitions. [2024-10-13 07:13:19,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 44 transitions, 194 flow [2024-10-13 07:13:19,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 44 transitions, 190 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-13 07:13:19,944 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 90 flow [2024-10-13 07:13:19,944 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2024-10-13 07:13:19,945 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2024-10-13 07:13:19,945 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 90 flow [2024-10-13 07:13:19,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:13:19,945 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:13:19,945 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] [2024-10-13 07:13:19,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 07:13:19,946 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:13:19,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:13:19,947 INFO L85 PathProgramCache]: Analyzing trace with hash 859726172, now seen corresponding path program 1 times [2024-10-13 07:13:19,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:13:19,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656774409] [2024-10-13 07:13:19,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:13:19,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:13:19,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:13:20,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:13:20,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:13:20,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656774409] [2024-10-13 07:13:20,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656774409] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:13:20,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:13:20,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 07:13:20,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620650101] [2024-10-13 07:13:20,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:13:20,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 07:13:20,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:13:20,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 07:13:20,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 07:13:20,045 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-10-13 07:13:20,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:13:20,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:13:20,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-10-13 07:13:20,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:13:20,118 INFO L124 PetriNetUnfolderBase]: 250/472 cut-off events. [2024-10-13 07:13:20,119 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-10-13 07:13:20,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1045 conditions, 472 events. 250/472 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2061 event pairs, 102 based on Foata normal form. 11/450 useless extension candidates. Maximal degree in co-relation 1022. Up to 314 conditions per place. [2024-10-13 07:13:20,122 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 32 selfloop transitions, 2 changer transitions 4/44 dead transitions. [2024-10-13 07:13:20,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 44 transitions, 201 flow [2024-10-13 07:13:20,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 07:13:20,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 07:13:20,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2024-10-13 07:13:20,123 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6344086021505376 [2024-10-13 07:13:20,124 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 90 flow. Second operand 3 states and 59 transitions. [2024-10-13 07:13:20,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 44 transitions, 201 flow [2024-10-13 07:13:20,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 44 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 07:13:20,125 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 100 flow [2024-10-13 07:13:20,125 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2024-10-13 07:13:20,126 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2024-10-13 07:13:20,126 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 100 flow [2024-10-13 07:13:20,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:13:20,126 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:13:20,127 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, 1] [2024-10-13 07:13:20,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 07:13:20,127 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:13:20,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:13:20,127 INFO L85 PathProgramCache]: Analyzing trace with hash 2141843345, now seen corresponding path program 1 times [2024-10-13 07:13:20,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:13:20,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786478221] [2024-10-13 07:13:20,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:13:20,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:13:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:13:20,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:13:20,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:13:20,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786478221] [2024-10-13 07:13:20,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786478221] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:13:20,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:13:20,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 07:13:20,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136772816] [2024-10-13 07:13:20,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:13:20,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:13:20,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:13:20,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:13:20,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:13:20,276 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-10-13 07:13:20,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:13:20,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:13:20,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-10-13 07:13:20,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:13:20,366 INFO L124 PetriNetUnfolderBase]: 307/599 cut-off events. [2024-10-13 07:13:20,366 INFO L125 PetriNetUnfolderBase]: For 73/80 co-relation queries the response was YES. [2024-10-13 07:13:20,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1379 conditions, 599 events. 307/599 cut-off events. For 73/80 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2846 event pairs, 247 based on Foata normal form. 12/564 useless extension candidates. Maximal degree in co-relation 1079. Up to 433 conditions per place. [2024-10-13 07:13:20,371 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 25 selfloop transitions, 2 changer transitions 17/50 dead transitions. [2024-10-13 07:13:20,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 50 transitions, 242 flow [2024-10-13 07:13:20,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:13:20,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:13:20,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 71 transitions. [2024-10-13 07:13:20,372 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5725806451612904 [2024-10-13 07:13:20,372 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 100 flow. Second operand 4 states and 71 transitions. [2024-10-13 07:13:20,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 50 transitions, 242 flow [2024-10-13 07:13:20,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 50 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 07:13:20,374 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 112 flow [2024-10-13 07:13:20,374 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2024-10-13 07:13:20,376 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2024-10-13 07:13:20,376 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 112 flow [2024-10-13 07:13:20,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:13:20,376 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:13:20,377 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, 1, 1] [2024-10-13 07:13:20,377 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-13 07:13:20,377 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:13:20,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:13:20,379 INFO L85 PathProgramCache]: Analyzing trace with hash 812735461, now seen corresponding path program 1 times [2024-10-13 07:13:20,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:13:20,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58422528] [2024-10-13 07:13:20,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:13:20,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:13:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:13:21,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:13:21,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:13:21,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58422528] [2024-10-13 07:13:21,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58422528] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:13:21,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584660229] [2024-10-13 07:13:21,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:13:21,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:13:21,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:13:21,050 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) [2024-10-13 07:13:21,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 07:13:21,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:13:21,133 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-13 07:13:21,137 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:13:21,845 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2024-10-13 07:13:21,845 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 34 treesize of output 10 [2024-10-13 07:13:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:13:21,868 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:13:22,342 INFO L349 Elim1Store]: treesize reduction 11, result has 87.1 percent of original size [2024-10-13 07:13:22,342 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 74 treesize of output 99 [2024-10-13 07:13:22,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:13:22,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584660229] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:13:22,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:13:22,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 12] total 30 [2024-10-13 07:13:22,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671453699] [2024-10-13 07:13:22,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:13:22,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-13 07:13:22,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:13:22,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-13 07:13:22,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2024-10-13 07:13:22,667 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-10-13 07:13:22,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 112 flow. Second operand has 31 states, 31 states have (on average 7.290322580645161) internal successors, (226), 31 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:13:22,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:13:22,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-10-13 07:13:22,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:13:26,331 INFO L124 PetriNetUnfolderBase]: 1209/2051 cut-off events. [2024-10-13 07:13:26,331 INFO L125 PetriNetUnfolderBase]: For 347/347 co-relation queries the response was YES. [2024-10-13 07:13:26,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4846 conditions, 2051 events. 1209/2051 cut-off events. For 347/347 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9779 event pairs, 107 based on Foata normal form. 3/1791 useless extension candidates. Maximal degree in co-relation 4828. Up to 349 conditions per place. [2024-10-13 07:13:26,343 INFO L140 encePairwiseOnDemand]: 16/31 looper letters, 200 selfloop transitions, 78 changer transitions 85/366 dead transitions. [2024-10-13 07:13:26,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 366 transitions, 1772 flow [2024-10-13 07:13:26,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-10-13 07:13:26,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2024-10-13 07:13:26,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 602 transitions. [2024-10-13 07:13:26,351 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38077166350411135 [2024-10-13 07:13:26,352 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 112 flow. Second operand 51 states and 602 transitions. [2024-10-13 07:13:26,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 366 transitions, 1772 flow [2024-10-13 07:13:26,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 366 transitions, 1762 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-10-13 07:13:26,367 INFO L231 Difference]: Finished difference. Result has 117 places, 111 transitions, 751 flow [2024-10-13 07:13:26,370 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=751, PETRI_PLACES=117, PETRI_TRANSITIONS=111} [2024-10-13 07:13:26,370 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 87 predicate places. [2024-10-13 07:13:26,372 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 111 transitions, 751 flow [2024-10-13 07:13:26,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 7.290322580645161) internal successors, (226), 31 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:13:26,372 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:13:26,372 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:13:26,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-13 07:13:26,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-13 07:13:26,577 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:13:26,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:13:26,577 INFO L85 PathProgramCache]: Analyzing trace with hash -729647344, now seen corresponding path program 2 times [2024-10-13 07:13:26,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:13:26,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678079485] [2024-10-13 07:13:26,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:13:26,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:13:26,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:13:26,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:13:26,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:13:26,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678079485] [2024-10-13 07:13:26,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678079485] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:13:26,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088361982] [2024-10-13 07:13:26,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:13:26,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:13:26,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:13:26,770 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) [2024-10-13 07:13:26,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 07:13:26,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:13:26,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:13:26,841 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-13 07:13:26,843 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:13:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:13:26,867 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:13:26,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:13:26,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088361982] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:13:26,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:13:26,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 6 [2024-10-13 07:13:26,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424066353] [2024-10-13 07:13:26,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:13:26,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 07:13:26,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:13:26,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 07:13:26,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-10-13 07:13:26,958 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-10-13 07:13:26,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 111 transitions, 751 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:13:26,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:13:26,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-10-13 07:13:26,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:13:27,231 INFO L124 PetriNetUnfolderBase]: 987/1917 cut-off events. [2024-10-13 07:13:27,232 INFO L125 PetriNetUnfolderBase]: For 10960/11071 co-relation queries the response was YES. [2024-10-13 07:13:27,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8592 conditions, 1917 events. 987/1917 cut-off events. For 10960/11071 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 9870 event pairs, 241 based on Foata normal form. 47/1882 useless extension candidates. Maximal degree in co-relation 8518. Up to 697 conditions per place. [2024-10-13 07:13:27,250 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 144 selfloop transitions, 31 changer transitions 0/186 dead transitions. [2024-10-13 07:13:27,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 186 transitions, 1663 flow [2024-10-13 07:13:27,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:13:27,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:13:27,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-10-13 07:13:27,251 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6935483870967742 [2024-10-13 07:13:27,251 INFO L175 Difference]: Start difference. First operand has 117 places, 111 transitions, 751 flow. Second operand 4 states and 86 transitions. [2024-10-13 07:13:27,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 186 transitions, 1663 flow [2024-10-13 07:13:27,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 186 transitions, 1403 flow, removed 121 selfloop flow, removed 15 redundant places. [2024-10-13 07:13:27,284 INFO L231 Difference]: Finished difference. Result has 95 places, 136 transitions, 897 flow [2024-10-13 07:13:27,284 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=897, PETRI_PLACES=95, PETRI_TRANSITIONS=136} [2024-10-13 07:13:27,285 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 65 predicate places. [2024-10-13 07:13:27,286 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 136 transitions, 897 flow [2024-10-13 07:13:27,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:13:27,286 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:13:27,287 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:13:27,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-13 07:13:27,487 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,SelfDestructingSolverStorable6 [2024-10-13 07:13:27,488 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:13:27,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:13:27,492 INFO L85 PathProgramCache]: Analyzing trace with hash -979768174, now seen corresponding path program 3 times [2024-10-13 07:13:27,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:13:27,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696690447] [2024-10-13 07:13:27,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:13:27,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:13:27,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:13:27,657 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:13:27,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:13:27,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696690447] [2024-10-13 07:13:27,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696690447] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:13:27,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139789969] [2024-10-13 07:13:27,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:13:27,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:13:27,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:13:27,661 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) [2024-10-13 07:13:27,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 07:13:27,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 07:13:27,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:13:27,740 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 07:13:27,741 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:13:27,839 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:13:27,840 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:13:27,898 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:13:27,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139789969] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:13:27,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:13:27,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2024-10-13 07:13:27,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911702635] [2024-10-13 07:13:27,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:13:27,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-13 07:13:27,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:13:27,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-13 07:13:27,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2024-10-13 07:13:27,938 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-10-13 07:13:27,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 136 transitions, 897 flow. Second operand has 15 states, 15 states have (on average 12.133333333333333) internal successors, (182), 15 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:13:27,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:13:27,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-10-13 07:13:27,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:13:28,377 INFO L124 PetriNetUnfolderBase]: 861/1832 cut-off events. [2024-10-13 07:13:28,377 INFO L125 PetriNetUnfolderBase]: For 6097/6191 co-relation queries the response was YES. [2024-10-13 07:13:28,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7131 conditions, 1832 events. 861/1832 cut-off events. For 6097/6191 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 10131 event pairs, 394 based on Foata normal form. 58/1819 useless extension candidates. Maximal degree in co-relation 4373. Up to 757 conditions per place. [2024-10-13 07:13:28,389 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 57 selfloop transitions, 8 changer transitions 138/209 dead transitions. [2024-10-13 07:13:28,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 209 transitions, 1669 flow [2024-10-13 07:13:28,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-13 07:13:28,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-13 07:13:28,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 281 transitions. [2024-10-13 07:13:28,391 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4532258064516129 [2024-10-13 07:13:28,391 INFO L175 Difference]: Start difference. First operand has 95 places, 136 transitions, 897 flow. Second operand 20 states and 281 transitions. [2024-10-13 07:13:28,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 209 transitions, 1669 flow [2024-10-13 07:13:28,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 209 transitions, 1631 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-10-13 07:13:28,403 INFO L231 Difference]: Finished difference. Result has 111 places, 59 transitions, 378 flow [2024-10-13 07:13:28,403 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=378, PETRI_PLACES=111, PETRI_TRANSITIONS=59} [2024-10-13 07:13:28,404 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 81 predicate places. [2024-10-13 07:13:28,404 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 59 transitions, 378 flow [2024-10-13 07:13:28,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 12.133333333333333) internal successors, (182), 15 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:13:28,404 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:13:28,405 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:13:28,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-13 07:13:28,605 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 [2024-10-13 07:13:28,606 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:13:28,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:13:28,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1294955623, now seen corresponding path program 4 times [2024-10-13 07:13:28,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:13:28,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523229420] [2024-10-13 07:13:28,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:13:28,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:13:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:13:29,970 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:13:29,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:13:29,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523229420] [2024-10-13 07:13:29,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523229420] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:13:29,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808067203] [2024-10-13 07:13:29,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:13:29,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:13:29,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:13:29,973 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) [2024-10-13 07:13:29,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 07:13:30,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:13:30,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:13:30,064 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-10-13 07:13:30,066 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:13:30,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-13 07:13:30,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-13 07:13:30,295 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-13 07:13:30,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2024-10-13 07:13:30,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-13 07:13:30,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-13 07:13:31,238 INFO L349 Elim1Store]: treesize reduction 89, result has 35.5 percent of original size [2024-10-13 07:13:31,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 64 [2024-10-13 07:13:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:13:31,318 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:13:34,629 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:13:34,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 197 treesize of output 113 [2024-10-13 07:13:34,783 INFO L349 Elim1Store]: treesize reduction 20, result has 90.4 percent of original size [2024-10-13 07:13:34,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 337 treesize of output 420 [2024-10-13 07:13:34,807 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-13 07:13:34,816 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-13 07:13:34,890 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:13:34,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 219 treesize of output 307 [2024-10-13 07:14:05,192 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:14:05,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 202 treesize of output 118 [2024-10-13 07:14:05,327 INFO L349 Elim1Store]: treesize reduction 16, result has 92.3 percent of original size [2024-10-13 07:14:05,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 297 treesize of output 390 [2024-10-13 07:14:05,353 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-13 07:14:05,359 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-13 07:14:05,434 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:14:05,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 182 treesize of output 275 [2024-10-13 07:14:33,241 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:14:33,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 202 treesize of output 118 [2024-10-13 07:14:33,381 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2024-10-13 07:14:33,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 297 treesize of output 398 [2024-10-13 07:14:33,412 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-13 07:14:33,479 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:14:33,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 182 treesize of output 283