./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/weaver/popl20-bad-ring.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 be394a9cdc866c1e1426a3fe296e99873bcf37ee5e7e1c9e487b239a3e0a8fbe --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 19:28:24,876 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 19:28:24,932 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 19:28:24,936 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 19:28:24,936 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 19:28:24,959 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 19:28:24,960 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 19:28:24,960 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 19:28:24,960 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 19:28:24,960 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 19:28:24,961 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 19:28:24,961 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 19:28:24,961 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 19:28:24,961 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 19:28:24,962 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 19:28:24,962 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 19:28:24,962 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 19:28:24,963 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 19:28:24,963 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 19:28:24,965 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 19:28:24,966 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 19:28:24,966 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 19:28:24,966 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 19:28:24,966 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 19:28:24,966 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 19:28:24,967 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 19:28:24,967 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 19:28:24,967 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 19:28:24,967 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 19:28:24,967 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 19:28:24,968 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 19:28:24,968 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 19:28:24,968 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:28:24,968 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 19:28:24,968 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 19:28:24,969 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 19:28:24,969 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 19:28:24,969 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 19:28:24,969 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 19:28:24,969 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 19:28:24,970 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 19:28:24,970 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 19:28:24,970 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be394a9cdc866c1e1426a3fe296e99873bcf37ee5e7e1c9e487b239a3e0a8fbe [2024-11-16 19:28:25,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 19:28:25,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 19:28:25,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 19:28:25,200 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 19:28:25,200 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 19:28:25,201 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2024-11-16 19:28:26,571 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 19:28:26,764 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 19:28:26,766 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2024-11-16 19:28:26,773 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa52bc071/36309c17afd241efa56fc47c513c5e72/FLAGaecc1cf2a [2024-11-16 19:28:26,786 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa52bc071/36309c17afd241efa56fc47c513c5e72 [2024-11-16 19:28:26,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 19:28:26,790 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 19:28:26,791 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 19:28:26,792 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 19:28:26,797 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 19:28:26,797 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:28:26" (1/1) ... [2024-11-16 19:28:26,798 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@325f5091 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:26, skipping insertion in model container [2024-11-16 19:28:26,798 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:28:26" (1/1) ... [2024-11-16 19:28:26,818 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 19:28:26,967 WARN L250 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-bad-ring.wvr.c[3986,3999] [2024-11-16 19:28:26,977 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:28:26,984 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 19:28:27,002 WARN L250 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-bad-ring.wvr.c[3986,3999] [2024-11-16 19:28:27,004 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:28:27,018 INFO L204 MainTranslator]: Completed translation [2024-11-16 19:28:27,019 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:27 WrapperNode [2024-11-16 19:28:27,019 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 19:28:27,020 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 19:28:27,020 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 19:28:27,020 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 19:28:27,025 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:27" (1/1) ... [2024-11-16 19:28:27,031 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:27" (1/1) ... [2024-11-16 19:28:27,057 INFO L138 Inliner]: procedures = 24, calls = 46, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 306 [2024-11-16 19:28:27,057 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 19:28:27,058 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 19:28:27,058 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 19:28:27,058 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 19:28:27,072 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:27" (1/1) ... [2024-11-16 19:28:27,072 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:27" (1/1) ... [2024-11-16 19:28:27,079 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:27" (1/1) ... [2024-11-16 19:28:27,097 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-16 19:28:27,101 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:27" (1/1) ... [2024-11-16 19:28:27,101 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:27" (1/1) ... [2024-11-16 19:28:27,111 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:27" (1/1) ... [2024-11-16 19:28:27,114 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:27" (1/1) ... [2024-11-16 19:28:27,116 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:27" (1/1) ... [2024-11-16 19:28:27,117 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:27" (1/1) ... [2024-11-16 19:28:27,122 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 19:28:27,122 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 19:28:27,123 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 19:28:27,123 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 19:28:27,126 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:27" (1/1) ... [2024-11-16 19:28:27,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:28:27,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:28:27,182 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) [2024-11-16 19:28:27,184 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 [2024-11-16 19:28:27,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 19:28:27,241 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-16 19:28:27,241 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-16 19:28:27,241 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-16 19:28:27,242 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-16 19:28:27,242 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-16 19:28:27,242 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-16 19:28:27,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 19:28:27,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 19:28:27,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 19:28:27,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 19:28:27,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-16 19:28:27,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-16 19:28:27,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-16 19:28:27,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 19:28:27,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 19:28:27,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 19:28:27,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 19:28:27,244 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-16 19:28:27,347 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 19:28:27,349 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 19:28:27,698 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-16 19:28:27,698 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 19:28:27,960 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 19:28:27,960 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 19:28:27,961 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:28:27 BoogieIcfgContainer [2024-11-16 19:28:27,961 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 19:28:27,964 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 19:28:27,964 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 19:28:27,967 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 19:28:27,968 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:28:26" (1/3) ... [2024-11-16 19:28:27,969 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ac9a23c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:28:27, skipping insertion in model container [2024-11-16 19:28:27,969 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:27" (2/3) ... [2024-11-16 19:28:27,970 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ac9a23c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:28:27, skipping insertion in model container [2024-11-16 19:28:27,970 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:28:27" (3/3) ... [2024-11-16 19:28:27,973 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2024-11-16 19:28:27,990 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 19:28:27,990 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 19:28:27,991 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-16 19:28:28,060 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-16 19:28:28,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 63 transitions, 147 flow [2024-11-16 19:28:28,127 INFO L124 PetriNetUnfolderBase]: 14/60 cut-off events. [2024-11-16 19:28:28,127 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-16 19:28:28,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 60 events. 14/60 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 100 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 45. Up to 3 conditions per place. [2024-11-16 19:28:28,131 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 63 transitions, 147 flow [2024-11-16 19:28:28,135 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 59 transitions, 136 flow [2024-11-16 19:28:28,146 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:28:28,153 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;@44d6c15, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:28:28,153 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-16 19:28:28,211 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:28:28,211 INFO L124 PetriNetUnfolderBase]: 14/58 cut-off events. [2024-11-16 19:28:28,212 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-16 19:28:28,212 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:28:28,212 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, 1] [2024-11-16 19:28:28,213 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:28:28,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:28:28,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1333961179, now seen corresponding path program 1 times [2024-11-16 19:28:28,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:28:28,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747637986] [2024-11-16 19:28:28,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:28,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:28:28,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:28,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:28:28,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:28:28,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747637986] [2024-11-16 19:28:28,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747637986] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:28:28,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:28:28,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:28:28,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837069729] [2024-11-16 19:28:28,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:28:28,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:28:28,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:28:28,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:28:28,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:28:28,494 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 63 [2024-11-16 19:28:28,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 59 transitions, 136 flow. Second operand has 2 states, 2 states have (on average 36.5) internal successors, (73), 2 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:28,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:28:28,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 63 [2024-11-16 19:28:28,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:28:28,775 INFO L124 PetriNetUnfolderBase]: 906/1583 cut-off events. [2024-11-16 19:28:28,775 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2024-11-16 19:28:28,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2899 conditions, 1583 events. 906/1583 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8564 event pairs, 733 based on Foata normal form. 329/1724 useless extension candidates. Maximal degree in co-relation 2686. Up to 1207 conditions per place. [2024-11-16 19:28:28,794 INFO L140 encePairwiseOnDemand]: 55/63 looper letters, 31 selfloop transitions, 0 changer transitions 0/51 dead transitions. [2024-11-16 19:28:28,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 51 transitions, 182 flow [2024-11-16 19:28:28,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:28:28,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:28:28,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 85 transitions. [2024-11-16 19:28:28,805 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6746031746031746 [2024-11-16 19:28:28,807 INFO L175 Difference]: Start difference. First operand has 55 places, 59 transitions, 136 flow. Second operand 2 states and 85 transitions. [2024-11-16 19:28:28,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 51 transitions, 182 flow [2024-11-16 19:28:28,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 51 transitions, 170 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-16 19:28:28,817 INFO L231 Difference]: Finished difference. Result has 50 places, 51 transitions, 108 flow [2024-11-16 19:28:28,819 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=108, PETRI_PLACES=50, PETRI_TRANSITIONS=51} [2024-11-16 19:28:28,823 INFO L277 CegarLoopForPetriNet]: 55 programPoint places, -5 predicate places. [2024-11-16 19:28:28,823 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 108 flow [2024-11-16 19:28:28,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 36.5) internal successors, (73), 2 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:28,824 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:28:28,824 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:28:28,824 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 19:28:28,824 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:28:28,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:28:28,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1347845485, now seen corresponding path program 1 times [2024-11-16 19:28:28,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:28:28,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18748166] [2024-11-16 19:28:28,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:28,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:28:28,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:29,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:28:29,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:28:29,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18748166] [2024-11-16 19:28:29,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18748166] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:28:29,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:28:29,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:28:29,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176462648] [2024-11-16 19:28:29,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:28:29,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:28:29,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:28:29,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:28:29,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:28:29,088 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 63 [2024-11-16 19:28:29,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 51 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:29,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:28:29,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 63 [2024-11-16 19:28:29,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:28:29,346 INFO L124 PetriNetUnfolderBase]: 797/1486 cut-off events. [2024-11-16 19:28:29,349 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-11-16 19:28:29,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2658 conditions, 1486 events. 797/1486 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 8182 event pairs, 261 based on Foata normal form. 15/1378 useless extension candidates. Maximal degree in co-relation 2655. Up to 794 conditions per place. [2024-11-16 19:28:29,360 INFO L140 encePairwiseOnDemand]: 60/63 looper letters, 42 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2024-11-16 19:28:29,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 64 transitions, 224 flow [2024-11-16 19:28:29,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:28:29,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:28:29,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2024-11-16 19:28:29,369 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-11-16 19:28:29,369 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 108 flow. Second operand 3 states and 114 transitions. [2024-11-16 19:28:29,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 64 transitions, 224 flow [2024-11-16 19:28:29,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 64 transitions, 224 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:28:29,371 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 120 flow [2024-11-16 19:28:29,372 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2024-11-16 19:28:29,372 INFO L277 CegarLoopForPetriNet]: 55 programPoint places, -2 predicate places. [2024-11-16 19:28:29,372 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 120 flow [2024-11-16 19:28:29,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:29,373 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:28:29,373 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:28:29,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 19:28:29,373 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:28:29,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:28:29,374 INFO L85 PathProgramCache]: Analyzing trace with hash 937923431, now seen corresponding path program 2 times [2024-11-16 19:28:29,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:28:29,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873803204] [2024-11-16 19:28:29,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:29,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:28:29,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:29,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:28:29,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:28:29,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873803204] [2024-11-16 19:28:29,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873803204] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:28:29,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:28:29,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:28:29,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395211255] [2024-11-16 19:28:29,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:28:29,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:28:29,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:28:29,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:28:29,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:28:29,480 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 63 [2024-11-16 19:28:29,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:29,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:28:29,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 63 [2024-11-16 19:28:29,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:28:29,762 INFO L124 PetriNetUnfolderBase]: 1432/2586 cut-off events. [2024-11-16 19:28:29,762 INFO L125 PetriNetUnfolderBase]: For 245/296 co-relation queries the response was YES. [2024-11-16 19:28:29,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5094 conditions, 2586 events. 1432/2586 cut-off events. For 245/296 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16038 event pairs, 622 based on Foata normal form. 2/2396 useless extension candidates. Maximal degree in co-relation 5089. Up to 1069 conditions per place. [2024-11-16 19:28:29,772 INFO L140 encePairwiseOnDemand]: 60/63 looper letters, 48 selfloop transitions, 2 changer transitions 4/74 dead transitions. [2024-11-16 19:28:29,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 74 transitions, 284 flow [2024-11-16 19:28:29,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:28:29,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:28:29,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2024-11-16 19:28:29,773 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6455026455026455 [2024-11-16 19:28:29,774 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 120 flow. Second operand 3 states and 122 transitions. [2024-11-16 19:28:29,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 74 transitions, 284 flow [2024-11-16 19:28:29,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 74 transitions, 281 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:28:29,775 INFO L231 Difference]: Finished difference. Result has 55 places, 53 transitions, 130 flow [2024-11-16 19:28:29,775 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=55, PETRI_TRANSITIONS=53} [2024-11-16 19:28:29,776 INFO L277 CegarLoopForPetriNet]: 55 programPoint places, 0 predicate places. [2024-11-16 19:28:29,776 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 53 transitions, 130 flow [2024-11-16 19:28:29,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:29,776 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:28:29,777 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:28:29,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 19:28:29,777 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:28:29,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:28:29,777 INFO L85 PathProgramCache]: Analyzing trace with hash -152417577, now seen corresponding path program 1 times [2024-11-16 19:28:29,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:28:29,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185732295] [2024-11-16 19:28:29,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:29,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:28:29,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:28:29,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:28:29,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185732295] [2024-11-16 19:28:29,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185732295] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:28:29,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:28:29,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:28:29,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328551825] [2024-11-16 19:28:29,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:28:29,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:28:29,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:28:29,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:28:29,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:28:29,899 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 63 [2024-11-16 19:28:29,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 53 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:29,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:28:29,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 63 [2024-11-16 19:28:29,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:28:30,102 INFO L124 PetriNetUnfolderBase]: 1002/1896 cut-off events. [2024-11-16 19:28:30,102 INFO L125 PetriNetUnfolderBase]: For 216/252 co-relation queries the response was YES. [2024-11-16 19:28:30,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3719 conditions, 1896 events. 1002/1896 cut-off events. For 216/252 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11517 event pairs, 465 based on Foata normal form. 44/1798 useless extension candidates. Maximal degree in co-relation 3713. Up to 797 conditions per place. [2024-11-16 19:28:30,108 INFO L140 encePairwiseOnDemand]: 60/63 looper letters, 39 selfloop transitions, 2 changer transitions 4/65 dead transitions. [2024-11-16 19:28:30,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 250 flow [2024-11-16 19:28:30,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:28:30,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:28:30,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 113 transitions. [2024-11-16 19:28:30,110 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5978835978835979 [2024-11-16 19:28:30,110 INFO L175 Difference]: Start difference. First operand has 55 places, 53 transitions, 130 flow. Second operand 3 states and 113 transitions. [2024-11-16 19:28:30,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 250 flow [2024-11-16 19:28:30,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 65 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:28:30,111 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 140 flow [2024-11-16 19:28:30,112 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-11-16 19:28:30,112 INFO L277 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-11-16 19:28:30,112 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 140 flow [2024-11-16 19:28:30,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:30,113 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:28:30,113 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:28:30,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-16 19:28:30,113 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:28:30,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:28:30,113 INFO L85 PathProgramCache]: Analyzing trace with hash 397326135, now seen corresponding path program 2 times [2024-11-16 19:28:30,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:28:30,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043225263] [2024-11-16 19:28:30,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:30,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:28:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:28:30,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:28:30,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043225263] [2024-11-16 19:28:30,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043225263] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:28:30,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:28:30,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:28:30,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698324043] [2024-11-16 19:28:30,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:28:30,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:28:30,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:28:30,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:28:30,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:28:30,252 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 63 [2024-11-16 19:28:30,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 140 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:30,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:28:30,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 63 [2024-11-16 19:28:30,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:28:30,521 INFO L124 PetriNetUnfolderBase]: 1031/1986 cut-off events. [2024-11-16 19:28:30,522 INFO L125 PetriNetUnfolderBase]: For 254/264 co-relation queries the response was YES. [2024-11-16 19:28:30,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4045 conditions, 1986 events. 1031/1986 cut-off events. For 254/264 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 11917 event pairs, 819 based on Foata normal form. 28/1881 useless extension candidates. Maximal degree in co-relation 4038. Up to 1473 conditions per place. [2024-11-16 19:28:30,529 INFO L140 encePairwiseOnDemand]: 56/63 looper letters, 36 selfloop transitions, 2 changer transitions 17/72 dead transitions. [2024-11-16 19:28:30,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 72 transitions, 289 flow [2024-11-16 19:28:30,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:28:30,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:28:30,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-11-16 19:28:30,530 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-11-16 19:28:30,530 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 140 flow. Second operand 5 states and 155 transitions. [2024-11-16 19:28:30,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 72 transitions, 289 flow [2024-11-16 19:28:30,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 72 transitions, 287 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:28:30,532 INFO L231 Difference]: Finished difference. Result has 63 places, 55 transitions, 158 flow [2024-11-16 19:28:30,532 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=158, PETRI_PLACES=63, PETRI_TRANSITIONS=55} [2024-11-16 19:28:30,533 INFO L277 CegarLoopForPetriNet]: 55 programPoint places, 8 predicate places. [2024-11-16 19:28:30,533 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 55 transitions, 158 flow [2024-11-16 19:28:30,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:30,534 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:28:30,534 INFO L204 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:28:30,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-16 19:28:30,534 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:28:30,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:28:30,534 INFO L85 PathProgramCache]: Analyzing trace with hash -317359745, now seen corresponding path program 1 times [2024-11-16 19:28:30,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:28:30,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618525285] [2024-11-16 19:28:30,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:30,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:28:30,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:30,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:28:30,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:28:30,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618525285] [2024-11-16 19:28:30,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618525285] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:28:30,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:28:30,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 19:28:30,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787303208] [2024-11-16 19:28:30,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:28:30,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:28:30,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:28:30,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:28:30,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:28:30,674 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 63 [2024-11-16 19:28:30,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 55 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:30,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:28:30,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 63 [2024-11-16 19:28:30,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:28:30,921 INFO L124 PetriNetUnfolderBase]: 1152/2211 cut-off events. [2024-11-16 19:28:30,921 INFO L125 PetriNetUnfolderBase]: For 627/637 co-relation queries the response was YES. [2024-11-16 19:28:30,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4838 conditions, 2211 events. 1152/2211 cut-off events. For 627/637 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 13570 event pairs, 940 based on Foata normal form. 32/2089 useless extension candidates. Maximal degree in co-relation 4828. Up to 1474 conditions per place. [2024-11-16 19:28:30,931 INFO L140 encePairwiseOnDemand]: 57/63 looper letters, 37 selfloop transitions, 2 changer transitions 22/78 dead transitions. [2024-11-16 19:28:30,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 78 transitions, 336 flow [2024-11-16 19:28:30,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:28:30,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:28:30,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-11-16 19:28:30,932 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5015873015873016 [2024-11-16 19:28:30,932 INFO L175 Difference]: Start difference. First operand has 63 places, 55 transitions, 158 flow. Second operand 5 states and 158 transitions. [2024-11-16 19:28:30,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 78 transitions, 336 flow [2024-11-16 19:28:30,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 78 transitions, 332 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-16 19:28:30,935 INFO L231 Difference]: Finished difference. Result has 66 places, 56 transitions, 172 flow [2024-11-16 19:28:30,935 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=66, PETRI_TRANSITIONS=56} [2024-11-16 19:28:30,936 INFO L277 CegarLoopForPetriNet]: 55 programPoint places, 11 predicate places. [2024-11-16 19:28:30,936 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 56 transitions, 172 flow [2024-11-16 19:28:30,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:30,937 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:28:30,937 INFO L204 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:28:30,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-16 19:28:30,937 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:28:30,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:28:30,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1372890359, now seen corresponding path program 1 times [2024-11-16 19:28:30,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:28:30,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881549819] [2024-11-16 19:28:30,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:30,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:28:30,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:31,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 19:28:31,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:28:31,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881549819] [2024-11-16 19:28:31,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881549819] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:28:31,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:28:31,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 19:28:31,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766055554] [2024-11-16 19:28:31,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:28:31,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:28:31,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:28:31,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:28:31,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:28:31,069 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 63 [2024-11-16 19:28:31,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 56 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:31,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:28:31,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 63 [2024-11-16 19:28:31,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:28:31,401 INFO L124 PetriNetUnfolderBase]: 1430/2767 cut-off events. [2024-11-16 19:28:31,401 INFO L125 PetriNetUnfolderBase]: For 869/915 co-relation queries the response was YES. [2024-11-16 19:28:31,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6089 conditions, 2767 events. 1430/2767 cut-off events. For 869/915 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 18162 event pairs, 1177 based on Foata normal form. 34/2602 useless extension candidates. Maximal degree in co-relation 6077. Up to 1475 conditions per place. [2024-11-16 19:28:31,409 INFO L140 encePairwiseOnDemand]: 58/63 looper letters, 38 selfloop transitions, 2 changer transitions 21/78 dead transitions. [2024-11-16 19:28:31,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 78 transitions, 361 flow [2024-11-16 19:28:31,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:28:31,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:28:31,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2024-11-16 19:28:31,411 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2024-11-16 19:28:31,411 INFO L175 Difference]: Start difference. First operand has 66 places, 56 transitions, 172 flow. Second operand 5 states and 156 transitions. [2024-11-16 19:28:31,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 78 transitions, 361 flow [2024-11-16 19:28:31,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 78 transitions, 347 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-16 19:28:31,414 INFO L231 Difference]: Finished difference. Result has 68 places, 57 transitions, 180 flow [2024-11-16 19:28:31,414 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=180, PETRI_PLACES=68, PETRI_TRANSITIONS=57} [2024-11-16 19:28:31,415 INFO L277 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2024-11-16 19:28:31,415 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 57 transitions, 180 flow [2024-11-16 19:28:31,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:31,415 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:28:31,415 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:28:31,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-16 19:28:31,416 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:28:31,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:28:31,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1484184300, now seen corresponding path program 1 times [2024-11-16 19:28:31,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:28:31,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656606726] [2024-11-16 19:28:31,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:31,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:28:31,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:31,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 19:28:31,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:28:31,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656606726] [2024-11-16 19:28:31,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656606726] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:28:31,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152780952] [2024-11-16 19:28:31,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:31,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:28:31,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:28:31,646 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) [2024-11-16 19:28:31,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 19:28:31,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:31,776 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-16 19:28:31,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:28:31,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 19:28:31,996 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:28:32,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2024-11-16 19:28:32,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 19:28:32,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152780952] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:28:32,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:28:32,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2024-11-16 19:28:32,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902626023] [2024-11-16 19:28:32,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:28:32,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-16 19:28:32,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:28:32,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-16 19:28:32,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2024-11-16 19:28:32,282 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 63 [2024-11-16 19:28:32,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 57 transitions, 180 flow. Second operand has 16 states, 16 states have (on average 25.0) internal successors, (400), 16 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:32,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:28:32,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 63 [2024-11-16 19:28:32,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:28:32,786 INFO L124 PetriNetUnfolderBase]: 1592/3255 cut-off events. [2024-11-16 19:28:32,787 INFO L125 PetriNetUnfolderBase]: For 964/964 co-relation queries the response was YES. [2024-11-16 19:28:32,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6999 conditions, 3255 events. 1592/3255 cut-off events. For 964/964 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 22702 event pairs, 512 based on Foata normal form. 228/3228 useless extension candidates. Maximal degree in co-relation 6986. Up to 1024 conditions per place. [2024-11-16 19:28:32,798 INFO L140 encePairwiseOnDemand]: 55/63 looper letters, 45 selfloop transitions, 4 changer transitions 66/132 dead transitions. [2024-11-16 19:28:32,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 132 transitions, 643 flow [2024-11-16 19:28:32,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-16 19:28:32,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-16 19:28:32,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 328 transitions. [2024-11-16 19:28:32,803 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4733044733044733 [2024-11-16 19:28:32,803 INFO L175 Difference]: Start difference. First operand has 68 places, 57 transitions, 180 flow. Second operand 11 states and 328 transitions. [2024-11-16 19:28:32,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 132 transitions, 643 flow [2024-11-16 19:28:32,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 132 transitions, 629 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-11-16 19:28:32,808 INFO L231 Difference]: Finished difference. Result has 81 places, 59 transitions, 224 flow [2024-11-16 19:28:32,808 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=224, PETRI_PLACES=81, PETRI_TRANSITIONS=59} [2024-11-16 19:28:32,809 INFO L277 CegarLoopForPetriNet]: 55 programPoint places, 26 predicate places. [2024-11-16 19:28:32,809 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 59 transitions, 224 flow [2024-11-16 19:28:32,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 25.0) internal successors, (400), 16 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:32,809 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:28:32,809 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:28:32,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 19:28:33,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:28:33,010 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:28:33,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:28:33,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1728407672, now seen corresponding path program 2 times [2024-11-16 19:28:33,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:28:33,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010898274] [2024-11-16 19:28:33,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:33,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:28:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 19:28:33,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:28:33,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010898274] [2024-11-16 19:28:33,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010898274] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:28:33,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240923499] [2024-11-16 19:28:33,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:28:33,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:28:33,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:28:33,515 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) [2024-11-16 19:28:33,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 19:28:33,620 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:28:33,621 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:28:33,623 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-16 19:28:33,627 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:28:33,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:28:33,739 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:28:33,985 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-11-16 19:28:33,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 15 [2024-11-16 19:28:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-16 19:28:34,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240923499] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:28:34,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:28:34,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 19 [2024-11-16 19:28:34,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247351482] [2024-11-16 19:28:34,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:28:34,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-16 19:28:34,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:28:34,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-16 19:28:34,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2024-11-16 19:28:34,092 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 63 [2024-11-16 19:28:34,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 59 transitions, 224 flow. Second operand has 19 states, 19 states have (on average 22.68421052631579) internal successors, (431), 19 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:34,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:28:34,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 63 [2024-11-16 19:28:34,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:28:35,481 INFO L124 PetriNetUnfolderBase]: 2239/4007 cut-off events. [2024-11-16 19:28:35,482 INFO L125 PetriNetUnfolderBase]: For 8063/8063 co-relation queries the response was YES. [2024-11-16 19:28:35,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10799 conditions, 4007 events. 2239/4007 cut-off events. For 8063/8063 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 25428 event pairs, 196 based on Foata normal form. 154/3878 useless extension candidates. Maximal degree in co-relation 10780. Up to 627 conditions per place. [2024-11-16 19:28:35,581 INFO L140 encePairwiseOnDemand]: 50/63 looper letters, 168 selfloop transitions, 37 changer transitions 17/237 dead transitions. [2024-11-16 19:28:35,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 237 transitions, 1397 flow [2024-11-16 19:28:35,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-16 19:28:35,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-16 19:28:35,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 701 transitions. [2024-11-16 19:28:35,591 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42796092796092794 [2024-11-16 19:28:35,592 INFO L175 Difference]: Start difference. First operand has 81 places, 59 transitions, 224 flow. Second operand 26 states and 701 transitions. [2024-11-16 19:28:35,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 237 transitions, 1397 flow [2024-11-16 19:28:35,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 237 transitions, 1184 flow, removed 104 selfloop flow, removed 9 redundant places. [2024-11-16 19:28:35,608 INFO L231 Difference]: Finished difference. Result has 103 places, 91 transitions, 466 flow [2024-11-16 19:28:35,608 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=466, PETRI_PLACES=103, PETRI_TRANSITIONS=91} [2024-11-16 19:28:35,609 INFO L277 CegarLoopForPetriNet]: 55 programPoint places, 48 predicate places. [2024-11-16 19:28:35,609 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 91 transitions, 466 flow [2024-11-16 19:28:35,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 22.68421052631579) internal successors, (431), 19 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:35,613 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:28:35,613 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:28:35,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-16 19:28:35,814 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,SelfDestructingSolverStorable8 [2024-11-16 19:28:35,814 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:28:35,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:28:35,818 INFO L85 PathProgramCache]: Analyzing trace with hash -979160818, now seen corresponding path program 3 times [2024-11-16 19:28:35,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:28:35,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243601117] [2024-11-16 19:28:35,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:35,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:28:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 19:28:36,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:28:36,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243601117] [2024-11-16 19:28:36,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243601117] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:28:36,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349761279] [2024-11-16 19:28:36,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 19:28:36,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:28:36,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:28:36,350 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) [2024-11-16 19:28:36,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 19:28:36,456 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-16 19:28:36,456 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:28:36,460 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-16 19:28:36,462 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:28:36,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-16 19:28:36,540 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:28:36,614 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-16 19:28:36,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-11-16 19:28:36,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-16 19:28:36,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349761279] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:28:36,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:28:36,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 17 [2024-11-16 19:28:36,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794676254] [2024-11-16 19:28:36,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:28:36,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-16 19:28:36,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:28:36,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-16 19:28:36,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2024-11-16 19:28:36,815 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 63 [2024-11-16 19:28:36,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 91 transitions, 466 flow. Second operand has 17 states, 17 states have (on average 23.11764705882353) internal successors, (393), 17 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:36,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:28:36,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 63 [2024-11-16 19:28:36,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:28:37,776 INFO L124 PetriNetUnfolderBase]: 2449/4370 cut-off events. [2024-11-16 19:28:37,776 INFO L125 PetriNetUnfolderBase]: For 6969/6969 co-relation queries the response was YES. [2024-11-16 19:28:37,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11835 conditions, 4370 events. 2449/4370 cut-off events. For 6969/6969 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 27799 event pairs, 438 based on Foata normal form. 45/4267 useless extension candidates. Maximal degree in co-relation 11812. Up to 1640 conditions per place. [2024-11-16 19:28:37,797 INFO L140 encePairwiseOnDemand]: 54/63 looper letters, 154 selfloop transitions, 28 changer transitions 0/197 dead transitions. [2024-11-16 19:28:37,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 197 transitions, 1268 flow [2024-11-16 19:28:37,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-16 19:28:37,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-16 19:28:37,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 444 transitions. [2024-11-16 19:28:37,799 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41456582633053224 [2024-11-16 19:28:37,799 INFO L175 Difference]: Start difference. First operand has 103 places, 91 transitions, 466 flow. Second operand 17 states and 444 transitions. [2024-11-16 19:28:37,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 197 transitions, 1268 flow [2024-11-16 19:28:37,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 197 transitions, 1144 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-11-16 19:28:37,811 INFO L231 Difference]: Finished difference. Result has 115 places, 98 transitions, 525 flow [2024-11-16 19:28:37,811 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=525, PETRI_PLACES=115, PETRI_TRANSITIONS=98} [2024-11-16 19:28:37,811 INFO L277 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2024-11-16 19:28:37,812 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 98 transitions, 525 flow [2024-11-16 19:28:37,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 23.11764705882353) internal successors, (393), 17 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:37,812 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:28:37,812 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:28:37,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-16 19:28:38,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:28:38,017 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:28:38,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:28:38,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1372455430, now seen corresponding path program 1 times [2024-11-16 19:28:38,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:28:38,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878244558] [2024-11-16 19:28:38,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:38,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:28:38,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:38,236 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 19:28:38,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:28:38,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878244558] [2024-11-16 19:28:38,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878244558] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:28:38,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755711321] [2024-11-16 19:28:38,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:38,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:28:38,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:28:38,239 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) [2024-11-16 19:28:38,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 19:28:38,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:38,340 INFO L255 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-16 19:28:38,344 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:28:38,576 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 19:28:38,576 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:28:38,900 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 19:28:38,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755711321] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:28:38,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:28:38,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-16 19:28:38,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734557040] [2024-11-16 19:28:38,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:28:38,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-16 19:28:38,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:28:38,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-16 19:28:38,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2024-11-16 19:28:38,908 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 63 [2024-11-16 19:28:38,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 98 transitions, 525 flow. Second operand has 18 states, 18 states have (on average 24.88888888888889) internal successors, (448), 18 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:38,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:28:38,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 63 [2024-11-16 19:28:38,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:28:39,686 INFO L124 PetriNetUnfolderBase]: 2256/4732 cut-off events. [2024-11-16 19:28:39,687 INFO L125 PetriNetUnfolderBase]: For 6824/7104 co-relation queries the response was YES. [2024-11-16 19:28:39,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12499 conditions, 4732 events. 2256/4732 cut-off events. For 6824/7104 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 34363 event pairs, 1073 based on Foata normal form. 172/4650 useless extension candidates. Maximal degree in co-relation 12475. Up to 2027 conditions per place. [2024-11-16 19:28:39,720 INFO L140 encePairwiseOnDemand]: 55/63 looper letters, 74 selfloop transitions, 7 changer transitions 57/160 dead transitions. [2024-11-16 19:28:39,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 160 transitions, 1089 flow [2024-11-16 19:28:39,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-16 19:28:39,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-16 19:28:39,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 277 transitions. [2024-11-16 19:28:39,722 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4396825396825397 [2024-11-16 19:28:39,722 INFO L175 Difference]: Start difference. First operand has 115 places, 98 transitions, 525 flow. Second operand 10 states and 277 transitions. [2024-11-16 19:28:39,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 160 transitions, 1089 flow [2024-11-16 19:28:39,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 160 transitions, 1044 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-11-16 19:28:39,739 INFO L231 Difference]: Finished difference. Result has 116 places, 99 transitions, 530 flow [2024-11-16 19:28:39,739 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=530, PETRI_PLACES=116, PETRI_TRANSITIONS=99} [2024-11-16 19:28:39,739 INFO L277 CegarLoopForPetriNet]: 55 programPoint places, 61 predicate places. [2024-11-16 19:28:39,739 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 99 transitions, 530 flow [2024-11-16 19:28:39,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 24.88888888888889) internal successors, (448), 18 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:39,740 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:28:39,740 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:28:39,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-16 19:28:39,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:28:39,941 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:28:39,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:28:39,941 INFO L85 PathProgramCache]: Analyzing trace with hash -572871534, now seen corresponding path program 2 times [2024-11-16 19:28:39,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:28:39,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614590824] [2024-11-16 19:28:39,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:39,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:28:40,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:41,228 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:28:41,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:28:41,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614590824] [2024-11-16 19:28:41,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614590824] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:28:41,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217461813] [2024-11-16 19:28:41,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:28:41,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:28:41,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:28:41,233 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:28:41,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 19:28:41,351 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:28:41,351 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:28:41,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-16 19:28:41,357 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:28:41,766 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 19:28:41,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31 [2024-11-16 19:28:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 19:28:41,812 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:28:42,184 INFO L349 Elim1Store]: treesize reduction 4, result has 95.7 percent of original size [2024-11-16 19:28:42,185 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 45 treesize of output 101 [2024-11-16 19:28:42,417 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-16 19:28:42,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217461813] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-16 19:28:42,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-16 19:28:42,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18, 11] total 35 [2024-11-16 19:28:42,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260347923] [2024-11-16 19:28:42,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:28:42,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-16 19:28:42,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:28:42,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-16 19:28:42,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2024-11-16 19:28:42,458 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 63 [2024-11-16 19:28:42,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 99 transitions, 530 flow. Second operand has 8 states, 8 states have (on average 25.25) internal successors, (202), 8 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:42,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:28:42,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 63 [2024-11-16 19:28:42,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:28:43,424 INFO L124 PetriNetUnfolderBase]: 3858/6584 cut-off events. [2024-11-16 19:28:43,425 INFO L125 PetriNetUnfolderBase]: For 10613/11028 co-relation queries the response was YES. [2024-11-16 19:28:43,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17825 conditions, 6584 events. 3858/6584 cut-off events. For 10613/11028 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 41451 event pairs, 450 based on Foata normal form. 142/6197 useless extension candidates. Maximal degree in co-relation 17796. Up to 2796 conditions per place. [2024-11-16 19:28:43,469 INFO L140 encePairwiseOnDemand]: 54/63 looper letters, 141 selfloop transitions, 13 changer transitions 2/180 dead transitions. [2024-11-16 19:28:43,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 180 transitions, 1214 flow [2024-11-16 19:28:43,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-16 19:28:43,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-16 19:28:43,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 271 transitions. [2024-11-16 19:28:43,471 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47795414462081126 [2024-11-16 19:28:43,471 INFO L175 Difference]: Start difference. First operand has 116 places, 99 transitions, 530 flow. Second operand 9 states and 271 transitions. [2024-11-16 19:28:43,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 180 transitions, 1214 flow [2024-11-16 19:28:43,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 180 transitions, 1186 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-11-16 19:28:43,494 INFO L231 Difference]: Finished difference. Result has 115 places, 102 transitions, 580 flow [2024-11-16 19:28:43,494 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=580, PETRI_PLACES=115, PETRI_TRANSITIONS=102} [2024-11-16 19:28:43,494 INFO L277 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2024-11-16 19:28:43,495 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 102 transitions, 580 flow [2024-11-16 19:28:43,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 25.25) internal successors, (202), 8 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:43,495 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:28:43,495 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:28:43,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-16 19:28:43,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-16 19:28:43,700 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:28:43,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:28:43,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1805823674, now seen corresponding path program 3 times [2024-11-16 19:28:43,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:28:43,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266795344] [2024-11-16 19:28:43,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:28:43,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:28:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:28:45,054 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:28:45,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:28:45,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266795344] [2024-11-16 19:28:45,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266795344] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:28:45,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756290831] [2024-11-16 19:28:45,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 19:28:45,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:28:45,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:28:45,061 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:28:45,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-16 19:28:45,218 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-16 19:28:45,218 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:28:45,220 INFO L255 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-16 19:28:45,223 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:28:45,759 INFO L349 Elim1Store]: treesize reduction 11, result has 77.6 percent of original size [2024-11-16 19:28:45,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 50 [2024-11-16 19:28:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 19:28:45,801 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:28:46,197 INFO L349 Elim1Store]: treesize reduction 20, result has 86.4 percent of original size [2024-11-16 19:28:46,197 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 57 treesize of output 143 [2024-11-16 19:28:46,507 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-16 19:28:46,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756290831] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:28:46,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:28:46,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 8] total 35 [2024-11-16 19:28:46,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78566736] [2024-11-16 19:28:46,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:28:46,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-16 19:28:46,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:28:46,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-16 19:28:46,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2024-11-16 19:28:46,786 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 63 [2024-11-16 19:28:46,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 102 transitions, 580 flow. Second operand has 35 states, 35 states have (on average 18.942857142857143) internal successors, (663), 35 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:28:46,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:28:46,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 63 [2024-11-16 19:28:46,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:28:53,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-16 19:28:57,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-16 19:29:01,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-16 19:29:06,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-16 19:29:10,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-16 19:29:16,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-16 19:29:21,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-16 19:29:25,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-16 19:29:31,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-16 19:29:37,400 INFO L124 PetriNetUnfolderBase]: 10097/17925 cut-off events. [2024-11-16 19:29:37,400 INFO L125 PetriNetUnfolderBase]: For 39962/39972 co-relation queries the response was YES. [2024-11-16 19:29:37,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52569 conditions, 17925 events. 10097/17925 cut-off events. For 39962/39972 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 138955 event pairs, 1542 based on Foata normal form. 142/17686 useless extension candidates. Maximal degree in co-relation 52542. Up to 6066 conditions per place. [2024-11-16 19:29:37,527 INFO L140 encePairwiseOnDemand]: 45/63 looper letters, 698 selfloop transitions, 206 changer transitions 13/930 dead transitions. [2024-11-16 19:29:37,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 930 transitions, 5952 flow [2024-11-16 19:29:37,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2024-11-16 19:29:37,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2024-11-16 19:29:37,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 2635 transitions. [2024-11-16 19:29:37,533 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3768053768053768 [2024-11-16 19:29:37,533 INFO L175 Difference]: Start difference. First operand has 115 places, 102 transitions, 580 flow. Second operand 111 states and 2635 transitions. [2024-11-16 19:29:37,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 930 transitions, 5952 flow [2024-11-16 19:29:37,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 930 transitions, 5832 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-11-16 19:29:37,613 INFO L231 Difference]: Finished difference. Result has 256 places, 306 transitions, 2709 flow [2024-11-16 19:29:37,613 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=111, PETRI_FLOW=2709, PETRI_PLACES=256, PETRI_TRANSITIONS=306} [2024-11-16 19:29:37,613 INFO L277 CegarLoopForPetriNet]: 55 programPoint places, 201 predicate places. [2024-11-16 19:29:37,613 INFO L471 AbstractCegarLoop]: Abstraction has has 256 places, 306 transitions, 2709 flow [2024-11-16 19:29:37,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 18.942857142857143) internal successors, (663), 35 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:37,614 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:37,614 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:37,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-16 19:29:37,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:37,816 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:29:37,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:37,816 INFO L85 PathProgramCache]: Analyzing trace with hash 2046189486, now seen corresponding path program 1 times [2024-11-16 19:29:37,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:37,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760214261] [2024-11-16 19:29:37,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:37,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:37,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:37,985 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-16 19:29:37,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:37,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760214261] [2024-11-16 19:29:37,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760214261] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:29:37,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439185536] [2024-11-16 19:29:37,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:37,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:37,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:37,990 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:29:37,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-16 19:29:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:38,108 INFO L255 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-16 19:29:38,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:29:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-16 19:29:38,278 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:29:39,193 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-16 19:29:39,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439185536] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:29:39,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:29:39,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-16 19:29:39,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626571783] [2024-11-16 19:29:39,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:29:39,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-16 19:29:39,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:39,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-16 19:29:39,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2024-11-16 19:29:39,227 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 63 [2024-11-16 19:29:39,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 306 transitions, 2709 flow. Second operand has 18 states, 18 states have (on average 25.333333333333332) internal successors, (456), 18 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:39,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:39,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 63 [2024-11-16 19:29:39,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:42,433 INFO L124 PetriNetUnfolderBase]: 6925/14951 cut-off events. [2024-11-16 19:29:42,433 INFO L125 PetriNetUnfolderBase]: For 79317/80353 co-relation queries the response was YES. [2024-11-16 19:29:42,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50384 conditions, 14951 events. 6925/14951 cut-off events. For 79317/80353 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 138228 event pairs, 3148 based on Foata normal form. 411/14620 useless extension candidates. Maximal degree in co-relation 50323. Up to 6601 conditions per place. [2024-11-16 19:29:42,551 INFO L140 encePairwiseOnDemand]: 56/63 looper letters, 242 selfloop transitions, 13 changer transitions 55/421 dead transitions. [2024-11-16 19:29:42,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 421 transitions, 4178 flow [2024-11-16 19:29:42,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-16 19:29:42,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-16 19:29:42,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 258 transitions. [2024-11-16 19:29:42,554 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-11-16 19:29:42,554 INFO L175 Difference]: Start difference. First operand has 256 places, 306 transitions, 2709 flow. Second operand 9 states and 258 transitions. [2024-11-16 19:29:42,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 421 transitions, 4178 flow [2024-11-16 19:29:43,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 421 transitions, 3400 flow, removed 339 selfloop flow, removed 16 redundant places. [2024-11-16 19:29:43,047 INFO L231 Difference]: Finished difference. Result has 250 places, 311 transitions, 2100 flow [2024-11-16 19:29:43,047 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2028, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2100, PETRI_PLACES=250, PETRI_TRANSITIONS=311} [2024-11-16 19:29:43,048 INFO L277 CegarLoopForPetriNet]: 55 programPoint places, 195 predicate places. [2024-11-16 19:29:43,048 INFO L471 AbstractCegarLoop]: Abstraction has has 250 places, 311 transitions, 2100 flow [2024-11-16 19:29:43,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 25.333333333333332) internal successors, (456), 18 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:43,048 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:43,049 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:43,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-16 19:29:43,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:43,249 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:29:43,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:43,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1862595724, now seen corresponding path program 4 times [2024-11-16 19:29:43,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:43,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334550770] [2024-11-16 19:29:43,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:43,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:43,327 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-16 19:29:43,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:43,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334550770] [2024-11-16 19:29:43,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334550770] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:29:43,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:29:43,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 19:29:43,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532425512] [2024-11-16 19:29:43,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:29:43,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:29:43,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:43,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:29:43,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:29:43,329 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 63 [2024-11-16 19:29:43,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 311 transitions, 2100 flow. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:43,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:43,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 63 [2024-11-16 19:29:43,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:45,935 INFO L124 PetriNetUnfolderBase]: 8031/16951 cut-off events. [2024-11-16 19:29:45,935 INFO L125 PetriNetUnfolderBase]: For 99183/100342 co-relation queries the response was YES. [2024-11-16 19:29:46,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57320 conditions, 16951 events. 8031/16951 cut-off events. For 99183/100342 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 149803 event pairs, 2229 based on Foata normal form. 342/16774 useless extension candidates. Maximal degree in co-relation 57257. Up to 4215 conditions per place. [2024-11-16 19:29:46,074 INFO L140 encePairwiseOnDemand]: 60/63 looper letters, 335 selfloop transitions, 5 changer transitions 4/460 dead transitions. [2024-11-16 19:29:46,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 460 transitions, 3793 flow [2024-11-16 19:29:46,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:29:46,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:29:46,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 155 transitions. [2024-11-16 19:29:46,075 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2024-11-16 19:29:46,075 INFO L175 Difference]: Start difference. First operand has 250 places, 311 transitions, 2100 flow. Second operand 4 states and 155 transitions. [2024-11-16 19:29:46,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 460 transitions, 3793 flow [2024-11-16 19:29:46,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 460 transitions, 3722 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-11-16 19:29:46,395 INFO L231 Difference]: Finished difference. Result has 252 places, 310 transitions, 2086 flow [2024-11-16 19:29:46,395 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2065, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2086, PETRI_PLACES=252, PETRI_TRANSITIONS=310} [2024-11-16 19:29:46,397 INFO L277 CegarLoopForPetriNet]: 55 programPoint places, 197 predicate places. [2024-11-16 19:29:46,397 INFO L471 AbstractCegarLoop]: Abstraction has has 252 places, 310 transitions, 2086 flow [2024-11-16 19:29:46,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:46,397 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:46,401 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:46,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-16 19:29:46,401 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:29:46,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:46,402 INFO L85 PathProgramCache]: Analyzing trace with hash -378376795, now seen corresponding path program 2 times [2024-11-16 19:29:46,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:46,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809512712] [2024-11-16 19:29:46,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:46,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:46,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:46,702 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-16 19:29:46,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:46,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809512712] [2024-11-16 19:29:46,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809512712] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:29:46,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:29:46,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 19:29:46,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732949651] [2024-11-16 19:29:46,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:29:46,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:29:46,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:46,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:29:46,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:29:46,703 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 63 [2024-11-16 19:29:46,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 310 transitions, 2086 flow. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:46,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:46,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 63 [2024-11-16 19:29:46,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:49,690 INFO L124 PetriNetUnfolderBase]: 6153/14205 cut-off events. [2024-11-16 19:29:49,690 INFO L125 PetriNetUnfolderBase]: For 76054/76708 co-relation queries the response was YES. [2024-11-16 19:29:49,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46213 conditions, 14205 events. 6153/14205 cut-off events. For 76054/76708 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 132528 event pairs, 1423 based on Foata normal form. 368/14277 useless extension candidates. Maximal degree in co-relation 46148. Up to 4410 conditions per place. [2024-11-16 19:29:50,025 INFO L140 encePairwiseOnDemand]: 60/63 looper letters, 206 selfloop transitions, 60 changer transitions 0/375 dead transitions. [2024-11-16 19:29:50,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 375 transitions, 2944 flow [2024-11-16 19:29:50,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:29:50,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:29:50,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 150 transitions. [2024-11-16 19:29:50,026 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-11-16 19:29:50,026 INFO L175 Difference]: Start difference. First operand has 252 places, 310 transitions, 2086 flow. Second operand 4 states and 150 transitions. [2024-11-16 19:29:50,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 375 transitions, 2944 flow [2024-11-16 19:29:50,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 375 transitions, 2834 flow, removed 44 selfloop flow, removed 12 redundant places. [2024-11-16 19:29:50,235 INFO L231 Difference]: Finished difference. Result has 231 places, 314 transitions, 2275 flow [2024-11-16 19:29:50,235 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=1662, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2275, PETRI_PLACES=231, PETRI_TRANSITIONS=314} [2024-11-16 19:29:50,236 INFO L277 CegarLoopForPetriNet]: 55 programPoint places, 176 predicate places. [2024-11-16 19:29:50,236 INFO L471 AbstractCegarLoop]: Abstraction has has 231 places, 314 transitions, 2275 flow [2024-11-16 19:29:50,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:50,236 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:50,236 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:50,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-16 19:29:50,237 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-16 19:29:50,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:50,238 INFO L85 PathProgramCache]: Analyzing trace with hash -2061102251, now seen corresponding path program 3 times [2024-11-16 19:29:50,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:50,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845617566] [2024-11-16 19:29:50,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:50,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:53,720 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:53,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:53,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845617566] [2024-11-16 19:29:53,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845617566] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:29:53,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106830027] [2024-11-16 19:29:53,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 19:29:53,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:53,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:53,730 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:29:53,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-16 19:29:53,868 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-16 19:29:53,868 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:29:53,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-16 19:29:53,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:29:56,508 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:56,509 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:29:58,141 INFO L349 Elim1Store]: treesize reduction 8, result has 96.8 percent of original size [2024-11-16 19:29:58,141 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 70 treesize of output 266