./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4eda2bf92bccdcc8638b67653fb7fdefc015ff9c815b317ad1009deb61d04585 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:35:22,873 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:35:22,933 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:35:22,938 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:35:22,940 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:35:22,980 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:35:22,981 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:35:22,981 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:35:22,982 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:35:22,983 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:35:22,984 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:35:22,984 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:35:22,985 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:35:22,985 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:35:22,987 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:35:22,987 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:35:22,987 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:35:22,988 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:35:22,988 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:35:22,988 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:35:22,988 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:35:22,992 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:35:22,992 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:35:22,992 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:35:22,992 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:35:22,993 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:35:22,993 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:35:22,993 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:35:22,993 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:35:22,993 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:35:22,993 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:35:22,994 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:35:22,994 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:35:22,994 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:35:22,994 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:35:22,994 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:35:22,995 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:35:22,995 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:35:22,995 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:35:22,996 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:35:22,997 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:35:22,997 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:35:22,997 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4eda2bf92bccdcc8638b67653fb7fdefc015ff9c815b317ad1009deb61d04585 [2024-10-11 14:35:23,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:35:23,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:35:23,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:35:23,267 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:35:23,268 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:35:23,269 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2024-10-11 14:35:24,607 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:35:24,828 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:35:24,829 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2024-10-11 14:35:24,836 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/b5b6faeab/4388ea6bb9824952bc8e027e98b87068/FLAGaea33e967 [2024-10-11 14:35:25,183 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/b5b6faeab/4388ea6bb9824952bc8e027e98b87068 [2024-10-11 14:35:25,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:35:25,187 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:35:25,188 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:35:25,188 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:35:25,194 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:35:25,195 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:35:25" (1/1) ... [2024-10-11 14:35:25,197 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4803cf96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:25, skipping insertion in model container [2024-10-11 14:35:25,198 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:35:25" (1/1) ... [2024-10-11 14:35:25,224 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:35:25,421 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3146,3159] [2024-10-11 14:35:25,429 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:35:25,436 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:35:25,458 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3146,3159] [2024-10-11 14:35:25,465 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:35:25,480 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:35:25,480 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:25 WrapperNode [2024-10-11 14:35:25,480 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:35:25,481 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:35:25,482 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:35:25,482 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:35:25,488 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:25" (1/1) ... [2024-10-11 14:35:25,496 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:25" (1/1) ... [2024-10-11 14:35:25,525 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 148 [2024-10-11 14:35:25,528 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:35:25,529 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:35:25,529 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:35:25,529 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:35:25,539 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:25" (1/1) ... [2024-10-11 14:35:25,540 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:25" (1/1) ... [2024-10-11 14:35:25,547 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:25" (1/1) ... [2024-10-11 14:35:25,565 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-11 14:35:25,566 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:25" (1/1) ... [2024-10-11 14:35:25,566 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:25" (1/1) ... [2024-10-11 14:35:25,576 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:25" (1/1) ... [2024-10-11 14:35:25,584 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:25" (1/1) ... [2024-10-11 14:35:25,585 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:25" (1/1) ... [2024-10-11 14:35:25,586 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:25" (1/1) ... [2024-10-11 14:35:25,592 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:35:25,593 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:35:25,595 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:35:25,596 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:35:25,596 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:25" (1/1) ... [2024-10-11 14:35:25,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:35:25,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:25,632 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 14:35:25,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 14:35:25,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:35:25,679 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 14:35:25,679 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 14:35:25,679 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 14:35:25,680 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 14:35:25,680 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-11 14:35:25,680 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-11 14:35:25,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:35:25,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 14:35:25,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 14:35:25,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 14:35:25,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-11 14:35:25,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-11 14:35:25,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 14:35:25,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:35:25,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:35:25,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 14:35:25,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 14:35:25,685 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 14:35:25,799 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:35:25,801 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:35:26,040 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:35:26,041 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:35:26,230 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:35:26,230 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-11 14:35:26,230 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:35:26 BoogieIcfgContainer [2024-10-11 14:35:26,230 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:35:26,232 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:35:26,233 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:35:26,236 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:35:26,236 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:35:25" (1/3) ... [2024-10-11 14:35:26,237 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@275a950e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:35:26, skipping insertion in model container [2024-10-11 14:35:26,237 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:25" (2/3) ... [2024-10-11 14:35:26,237 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@275a950e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:35:26, skipping insertion in model container [2024-10-11 14:35:26,237 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:35:26" (3/3) ... [2024-10-11 14:35:26,240 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2024-10-11 14:35:26,257 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:35:26,258 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:35:26,258 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:35:26,308 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-11 14:35:26,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 36 transitions, 93 flow [2024-10-11 14:35:26,374 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2024-10-11 14:35:26,374 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-11 14:35:26,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 33 events. 4/33 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 57 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 28. Up to 2 conditions per place. [2024-10-11 14:35:26,382 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 36 transitions, 93 flow [2024-10-11 14:35:26,385 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 32 transitions, 82 flow [2024-10-11 14:35:26,410 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:35:26,419 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;@3feed28c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:35:26,420 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-11 14:35:26,431 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:35:26,432 INFO L124 PetriNetUnfolderBase]: 4/31 cut-off events. [2024-10-11 14:35:26,432 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-11 14:35:26,432 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:26,433 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:26,433 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)] === [2024-10-11 14:35:26,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:26,440 INFO L85 PathProgramCache]: Analyzing trace with hash -594700694, now seen corresponding path program 1 times [2024-10-11 14:35:26,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:26,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202477116] [2024-10-11 14:35:26,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:26,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:26,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:27,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:27,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:27,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202477116] [2024-10-11 14:35:27,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202477116] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:35:27,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:35:27,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 14:35:27,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698568040] [2024-10-11 14:35:27,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:35:27,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:35:27,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:27,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:35:27,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 14:35:27,165 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 36 [2024-10-11 14:35:27,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:27,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:27,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 36 [2024-10-11 14:35:27,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:27,531 INFO L124 PetriNetUnfolderBase]: 487/825 cut-off events. [2024-10-11 14:35:27,532 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-10-11 14:35:27,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1622 conditions, 825 events. 487/825 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3982 event pairs, 54 based on Foata normal form. 84/853 useless extension candidates. Maximal degree in co-relation 1551. Up to 280 conditions per place. [2024-10-11 14:35:27,541 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 53 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2024-10-11 14:35:27,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 66 transitions, 276 flow [2024-10-11 14:35:27,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:35:27,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:35:27,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-10-11 14:35:27,554 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2024-10-11 14:35:27,555 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 82 flow. Second operand 5 states and 119 transitions. [2024-10-11 14:35:27,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 66 transitions, 276 flow [2024-10-11 14:35:27,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 66 transitions, 256 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-11 14:35:27,565 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 94 flow [2024-10-11 14:35:27,568 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=94, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2024-10-11 14:35:27,573 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2024-10-11 14:35:27,573 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 94 flow [2024-10-11 14:35:27,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:27,574 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:27,574 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:27,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:35:27,575 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)] === [2024-10-11 14:35:27,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:27,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1967084675, now seen corresponding path program 1 times [2024-10-11 14:35:27,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:27,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264176724] [2024-10-11 14:35:27,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:27,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:27,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:27,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:27,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:27,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264176724] [2024-10-11 14:35:27,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264176724] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:35:27,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:35:27,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:35:27,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106502365] [2024-10-11 14:35:27,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:35:27,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:35:27,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:27,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:35:27,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:35:27,679 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2024-10-11 14:35:27,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:27,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:27,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2024-10-11 14:35:27,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:27,766 INFO L124 PetriNetUnfolderBase]: 190/380 cut-off events. [2024-10-11 14:35:27,767 INFO L125 PetriNetUnfolderBase]: For 347/444 co-relation queries the response was YES. [2024-10-11 14:35:27,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 804 conditions, 380 events. 190/380 cut-off events. For 347/444 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1586 event pairs, 61 based on Foata normal form. 115/446 useless extension candidates. Maximal degree in co-relation 254. Up to 240 conditions per place. [2024-10-11 14:35:27,770 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 24 selfloop transitions, 3 changer transitions 2/42 dead transitions. [2024-10-11 14:35:27,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 42 transitions, 169 flow [2024-10-11 14:35:27,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:35:27,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:35:27,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-10-11 14:35:27,774 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2024-10-11 14:35:27,774 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 94 flow. Second operand 3 states and 74 transitions. [2024-10-11 14:35:27,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 42 transitions, 169 flow [2024-10-11 14:35:27,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 42 transitions, 165 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 14:35:27,776 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 109 flow [2024-10-11 14:35:27,776 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2024-10-11 14:35:27,777 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2024-10-11 14:35:27,778 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 109 flow [2024-10-11 14:35:27,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:27,778 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:27,778 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] [2024-10-11 14:35:27,778 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 14:35:27,779 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)] === [2024-10-11 14:35:27,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:27,780 INFO L85 PathProgramCache]: Analyzing trace with hash 637441564, now seen corresponding path program 1 times [2024-10-11 14:35:27,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:27,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673539021] [2024-10-11 14:35:27,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:27,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:27,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:35:27,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:27,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673539021] [2024-10-11 14:35:27,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673539021] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:35:27,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:35:27,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:35:27,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409841413] [2024-10-11 14:35:27,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:35:27,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:35:27,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:27,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:35:27,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:35:27,955 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2024-10-11 14:35:27,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 109 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:27,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:27,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2024-10-11 14:35:27,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:28,057 INFO L124 PetriNetUnfolderBase]: 203/405 cut-off events. [2024-10-11 14:35:28,057 INFO L125 PetriNetUnfolderBase]: For 409/547 co-relation queries the response was YES. [2024-10-11 14:35:28,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 963 conditions, 405 events. 203/405 cut-off events. For 409/547 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1741 event pairs, 122 based on Foata normal form. 128/477 useless extension candidates. Maximal degree in co-relation 702. Up to 288 conditions per place. [2024-10-11 14:35:28,060 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 22 selfloop transitions, 2 changer transitions 10/47 dead transitions. [2024-10-11 14:35:28,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 202 flow [2024-10-11 14:35:28,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 14:35:28,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 14:35:28,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-10-11 14:35:28,062 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-10-11 14:35:28,062 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 109 flow. Second operand 4 states and 92 transitions. [2024-10-11 14:35:28,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 202 flow [2024-10-11 14:35:28,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:35:28,065 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 120 flow [2024-10-11 14:35:28,065 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=120, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2024-10-11 14:35:28,066 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2024-10-11 14:35:28,066 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 120 flow [2024-10-11 14:35:28,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:28,066 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:28,067 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] [2024-10-11 14:35:28,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 14:35:28,067 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)] === [2024-10-11 14:35:28,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:28,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1066497001, now seen corresponding path program 1 times [2024-10-11 14:35:28,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:28,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147737683] [2024-10-11 14:35:28,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:28,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:28,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:35:28,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:28,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147737683] [2024-10-11 14:35:28,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147737683] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:28,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608880148] [2024-10-11 14:35:28,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:28,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:28,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:28,261 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:35:28,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 14:35:28,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:28,361 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 14:35:28,366 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:35:28,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:35:28,462 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:35:28,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:35:28,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608880148] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:35:28,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:35:28,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 8 [2024-10-11 14:35:28,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650069894] [2024-10-11 14:35:28,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:35:28,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 14:35:28,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:28,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 14:35:28,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-11 14:35:28,653 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-10-11 14:35:28,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 120 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:28,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:28,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-10-11 14:35:28,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:28,975 INFO L124 PetriNetUnfolderBase]: 810/1303 cut-off events. [2024-10-11 14:35:28,977 INFO L125 PetriNetUnfolderBase]: For 1197/1508 co-relation queries the response was YES. [2024-10-11 14:35:28,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3345 conditions, 1303 events. 810/1303 cut-off events. For 1197/1508 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6003 event pairs, 82 based on Foata normal form. 345/1586 useless extension candidates. Maximal degree in co-relation 3329. Up to 376 conditions per place. [2024-10-11 14:35:28,984 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 70 selfloop transitions, 13 changer transitions 15/104 dead transitions. [2024-10-11 14:35:28,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 104 transitions, 551 flow [2024-10-11 14:35:28,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 14:35:28,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-11 14:35:28,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-10-11 14:35:28,988 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49444444444444446 [2024-10-11 14:35:28,988 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 120 flow. Second operand 10 states and 178 transitions. [2024-10-11 14:35:28,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 104 transitions, 551 flow [2024-10-11 14:35:28,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 104 transitions, 539 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-10-11 14:35:28,994 INFO L231 Difference]: Finished difference. Result has 55 places, 44 transitions, 188 flow [2024-10-11 14:35:28,995 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=188, PETRI_PLACES=55, PETRI_TRANSITIONS=44} [2024-10-11 14:35:28,996 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 17 predicate places. [2024-10-11 14:35:28,996 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 44 transitions, 188 flow [2024-10-11 14:35:28,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:28,997 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:28,997 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] [2024-10-11 14:35:29,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 14:35:29,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:29,199 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)] === [2024-10-11 14:35:29,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:29,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1993090265, now seen corresponding path program 2 times [2024-10-11 14:35:29,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:29,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238121718] [2024-10-11 14:35:29,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:29,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:29,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:29,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238121718] [2024-10-11 14:35:29,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238121718] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:29,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834350760] [2024-10-11 14:35:29,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:35:29,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:29,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:29,995 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:35:29,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 14:35:30,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:35:30,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:35:30,082 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-11 14:35:30,084 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:35:30,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-11 14:35:30,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:30,383 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:35:30,859 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 61 treesize of output 55 [2024-10-11 14:35:30,877 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:35:30,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 68 [2024-10-11 14:35:31,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:31,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834350760] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:35:31,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:35:31,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-10-11 14:35:31,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958404737] [2024-10-11 14:35:31,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:35:31,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-11 14:35:31,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:31,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-11 14:35:31,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2024-10-11 14:35:31,111 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 36 [2024-10-11 14:35:31,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 44 transitions, 188 flow. Second operand has 25 states, 25 states have (on average 13.36) internal successors, (334), 25 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:31,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:31,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 36 [2024-10-11 14:35:31,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:33,282 INFO L124 PetriNetUnfolderBase]: 3085/5062 cut-off events. [2024-10-11 14:35:33,283 INFO L125 PetriNetUnfolderBase]: For 4642/4817 co-relation queries the response was YES. [2024-10-11 14:35:33,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13621 conditions, 5062 events. 3085/5062 cut-off events. For 4642/4817 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 30726 event pairs, 284 based on Foata normal form. 403/5337 useless extension candidates. Maximal degree in co-relation 10937. Up to 909 conditions per place. [2024-10-11 14:35:33,310 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 206 selfloop transitions, 59 changer transitions 19/299 dead transitions. [2024-10-11 14:35:33,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 299 transitions, 1644 flow [2024-10-11 14:35:33,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-11 14:35:33,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-10-11 14:35:33,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 647 transitions. [2024-10-11 14:35:33,314 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5285947712418301 [2024-10-11 14:35:33,314 INFO L175 Difference]: Start difference. First operand has 55 places, 44 transitions, 188 flow. Second operand 34 states and 647 transitions. [2024-10-11 14:35:33,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 299 transitions, 1644 flow [2024-10-11 14:35:33,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 299 transitions, 1626 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 14:35:33,338 INFO L231 Difference]: Finished difference. Result has 105 places, 99 transitions, 687 flow [2024-10-11 14:35:33,338 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=687, PETRI_PLACES=105, PETRI_TRANSITIONS=99} [2024-10-11 14:35:33,341 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 67 predicate places. [2024-10-11 14:35:33,341 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 99 transitions, 687 flow [2024-10-11 14:35:33,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 13.36) internal successors, (334), 25 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:33,341 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:33,342 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:33,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 14:35:33,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:33,544 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)] === [2024-10-11 14:35:33,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:33,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1695217996, now seen corresponding path program 3 times [2024-10-11 14:35:33,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:33,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248171086] [2024-10-11 14:35:33,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:33,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:33,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:35,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:35,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:35,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248171086] [2024-10-11 14:35:35,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248171086] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:35,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317930846] [2024-10-11 14:35:35,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:35:35,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:35,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:35,076 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:35:35,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 14:35:35,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 14:35:35,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:35:35,184 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-11 14:35:35,186 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:35:35,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-11 14:35:35,359 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:35:35,485 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:35:35,486 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 40 treesize of output 24 [2024-10-11 14:35:35,570 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-11 14:35:35,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317930846] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:35:35,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:35:35,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 21 [2024-10-11 14:35:35,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449549789] [2024-10-11 14:35:35,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:35:35,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-11 14:35:35,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:35,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-11 14:35:35,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2024-10-11 14:35:35,628 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-10-11 14:35:35,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 99 transitions, 687 flow. Second operand has 22 states, 22 states have (on average 12.272727272727273) internal successors, (270), 22 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:35,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:35,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-10-11 14:35:35,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:37,875 INFO L124 PetriNetUnfolderBase]: 4045/6668 cut-off events. [2024-10-11 14:35:37,875 INFO L125 PetriNetUnfolderBase]: For 40245/40313 co-relation queries the response was YES. [2024-10-11 14:35:37,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28617 conditions, 6668 events. 4045/6668 cut-off events. For 40245/40313 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 40510 event pairs, 508 based on Foata normal form. 198/6830 useless extension candidates. Maximal degree in co-relation 24554. Up to 1517 conditions per place. [2024-10-11 14:35:37,932 INFO L140 encePairwiseOnDemand]: 23/36 looper letters, 172 selfloop transitions, 65 changer transitions 12/260 dead transitions. [2024-10-11 14:35:37,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 260 transitions, 2176 flow [2024-10-11 14:35:37,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-11 14:35:37,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-10-11 14:35:37,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 433 transitions. [2024-10-11 14:35:37,935 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4454732510288066 [2024-10-11 14:35:37,935 INFO L175 Difference]: Start difference. First operand has 105 places, 99 transitions, 687 flow. Second operand 27 states and 433 transitions. [2024-10-11 14:35:37,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 260 transitions, 2176 flow [2024-10-11 14:35:38,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 260 transitions, 2112 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-10-11 14:35:38,020 INFO L231 Difference]: Finished difference. Result has 132 places, 119 transitions, 926 flow [2024-10-11 14:35:38,020 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=926, PETRI_PLACES=132, PETRI_TRANSITIONS=119} [2024-10-11 14:35:38,021 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 94 predicate places. [2024-10-11 14:35:38,022 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 119 transitions, 926 flow [2024-10-11 14:35:38,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 12.272727272727273) internal successors, (270), 22 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:38,023 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:38,023 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] [2024-10-11 14:35:38,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 14:35:38,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:38,281 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)] === [2024-10-11 14:35:38,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:38,281 INFO L85 PathProgramCache]: Analyzing trace with hash 270446996, now seen corresponding path program 4 times [2024-10-11 14:35:38,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:38,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682556898] [2024-10-11 14:35:38,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:38,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:38,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:38,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:35:38,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:38,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682556898] [2024-10-11 14:35:38,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682556898] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:35:38,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:35:38,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:35:38,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348771083] [2024-10-11 14:35:38,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:35:38,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:35:38,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:38,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:35:38,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:35:38,366 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2024-10-11 14:35:38,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 119 transitions, 926 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:38,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:38,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2024-10-11 14:35:38,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:39,119 INFO L124 PetriNetUnfolderBase]: 2840/5442 cut-off events. [2024-10-11 14:35:39,119 INFO L125 PetriNetUnfolderBase]: For 64613/65357 co-relation queries the response was YES. [2024-10-11 14:35:39,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27955 conditions, 5442 events. 2840/5442 cut-off events. For 64613/65357 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 38888 event pairs, 717 based on Foata normal form. 335/5119 useless extension candidates. Maximal degree in co-relation 20723. Up to 2284 conditions per place. [2024-10-11 14:35:39,165 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 78 selfloop transitions, 27 changer transitions 0/155 dead transitions. [2024-10-11 14:35:39,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 155 transitions, 1453 flow [2024-10-11 14:35:39,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 14:35:39,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 14:35:39,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-10-11 14:35:39,168 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7361111111111112 [2024-10-11 14:35:39,168 INFO L175 Difference]: Start difference. First operand has 132 places, 119 transitions, 926 flow. Second operand 4 states and 106 transitions. [2024-10-11 14:35:39,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 155 transitions, 1453 flow [2024-10-11 14:35:39,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 155 transitions, 1363 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-10-11 14:35:39,221 INFO L231 Difference]: Finished difference. Result has 128 places, 133 transitions, 1146 flow [2024-10-11 14:35:39,221 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1146, PETRI_PLACES=128, PETRI_TRANSITIONS=133} [2024-10-11 14:35:39,222 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 90 predicate places. [2024-10-11 14:35:39,222 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 133 transitions, 1146 flow [2024-10-11 14:35:39,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:39,223 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:39,223 INFO L204 CegarLoopForPetriNet]: trace histogram [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] [2024-10-11 14:35:39,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-11 14:35:39,223 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)] === [2024-10-11 14:35:39,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:39,224 INFO L85 PathProgramCache]: Analyzing trace with hash 239839241, now seen corresponding path program 5 times [2024-10-11 14:35:39,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:39,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132743645] [2024-10-11 14:35:39,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:39,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:39,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:39,362 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:35:39,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:39,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132743645] [2024-10-11 14:35:39,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132743645] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:39,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528208799] [2024-10-11 14:35:39,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:35:39,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:39,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:39,366 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:35:39,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 14:35:39,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:35:39,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:35:39,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-11 14:35:39,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:35:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:35:39,512 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 14:35:39,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528208799] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:35:39,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 14:35:39,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2024-10-11 14:35:39,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772077302] [2024-10-11 14:35:39,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:35:39,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:35:39,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:39,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:35:39,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:35:39,525 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 36 [2024-10-11 14:35:39,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 133 transitions, 1146 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:39,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:39,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 36 [2024-10-11 14:35:39,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:40,924 INFO L124 PetriNetUnfolderBase]: 5554/9405 cut-off events. [2024-10-11 14:35:40,925 INFO L125 PetriNetUnfolderBase]: For 94916/95790 co-relation queries the response was YES. [2024-10-11 14:35:40,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48024 conditions, 9405 events. 5554/9405 cut-off events. For 94916/95790 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 62746 event pairs, 832 based on Foata normal form. 734/9556 useless extension candidates. Maximal degree in co-relation 36890. Up to 4582 conditions per place. [2024-10-11 14:35:41,013 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 138 selfloop transitions, 9 changer transitions 0/180 dead transitions. [2024-10-11 14:35:41,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 180 transitions, 1989 flow [2024-10-11 14:35:41,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:35:41,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:35:41,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-10-11 14:35:41,015 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-10-11 14:35:41,015 INFO L175 Difference]: Start difference. First operand has 128 places, 133 transitions, 1146 flow. Second operand 5 states and 100 transitions. [2024-10-11 14:35:41,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 180 transitions, 1989 flow [2024-10-11 14:35:41,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 180 transitions, 1957 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-10-11 14:35:41,131 INFO L231 Difference]: Finished difference. Result has 135 places, 129 transitions, 1140 flow [2024-10-11 14:35:41,131 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1140, PETRI_PLACES=135, PETRI_TRANSITIONS=129} [2024-10-11 14:35:41,133 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 97 predicate places. [2024-10-11 14:35:41,134 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 129 transitions, 1140 flow [2024-10-11 14:35:41,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:41,134 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:41,134 INFO L204 CegarLoopForPetriNet]: trace histogram [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] [2024-10-11 14:35:41,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-11 14:35:41,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-11 14:35:41,339 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)] === [2024-10-11 14:35:41,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:41,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1178245027, now seen corresponding path program 1 times [2024-10-11 14:35:41,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:41,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889329441] [2024-10-11 14:35:41,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:41,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:41,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:41,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:35:41,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:41,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889329441] [2024-10-11 14:35:41,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889329441] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:41,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984363998] [2024-10-11 14:35:41,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:41,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:41,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:41,578 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:35:41,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 14:35:41,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:41,746 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 14:35:41,747 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:35:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:35:41,829 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:35:41,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:35:41,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984363998] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:35:41,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:35:41,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-10-11 14:35:41,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921781906] [2024-10-11 14:35:41,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:35:41,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 14:35:41,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:41,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 14:35:41,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-10-11 14:35:41,921 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2024-10-11 14:35:41,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 129 transitions, 1140 flow. Second operand has 15 states, 15 states have (on average 17.4) internal successors, (261), 15 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:41,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:41,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2024-10-11 14:35:41,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:42,682 INFO L124 PetriNetUnfolderBase]: 2482/5353 cut-off events. [2024-10-11 14:35:42,683 INFO L125 PetriNetUnfolderBase]: For 63250/63727 co-relation queries the response was YES. [2024-10-11 14:35:42,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28868 conditions, 5353 events. 2482/5353 cut-off events. For 63250/63727 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 40684 event pairs, 1645 based on Foata normal form. 205/5088 useless extension candidates. Maximal degree in co-relation 26940. Up to 3667 conditions per place. [2024-10-11 14:35:42,722 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 53 selfloop transitions, 3 changer transitions 27/125 dead transitions. [2024-10-11 14:35:42,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 125 transitions, 1160 flow [2024-10-11 14:35:42,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:35:42,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:35:42,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-10-11 14:35:42,724 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-10-11 14:35:42,724 INFO L175 Difference]: Start difference. First operand has 135 places, 129 transitions, 1140 flow. Second operand 7 states and 146 transitions. [2024-10-11 14:35:42,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 125 transitions, 1160 flow [2024-10-11 14:35:42,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 125 transitions, 1096 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-10-11 14:35:42,793 INFO L231 Difference]: Finished difference. Result has 127 places, 98 transitions, 815 flow [2024-10-11 14:35:42,793 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=815, PETRI_PLACES=127, PETRI_TRANSITIONS=98} [2024-10-11 14:35:42,794 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 89 predicate places. [2024-10-11 14:35:42,794 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 98 transitions, 815 flow [2024-10-11 14:35:42,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 17.4) internal successors, (261), 15 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:42,794 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:42,794 INFO L204 CegarLoopForPetriNet]: trace histogram [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] [2024-10-11 14:35:42,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 14:35:42,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:42,999 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)] === [2024-10-11 14:35:42,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:42,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1031576964, now seen corresponding path program 2 times [2024-10-11 14:35:43,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:43,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970402732] [2024-10-11 14:35:43,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:43,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:43,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:44,427 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:44,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:44,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970402732] [2024-10-11 14:35:44,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970402732] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:44,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584963198] [2024-10-11 14:35:44,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:35:44,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:44,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:44,430 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:35:44,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 14:35:44,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:35:44,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:35:44,524 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-11 14:35:44,527 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:35:45,192 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-10-11 14:35:45,193 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 39 treesize of output 17 [2024-10-11 14:35:45,246 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:45,247 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:35:45,838 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2024-10-11 14:35:45,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 52 [2024-10-11 14:35:46,612 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:46,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584963198] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:35:46,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:35:46,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 38 [2024-10-11 14:35:46,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073456647] [2024-10-11 14:35:46,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:35:46,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-10-11 14:35:46,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:46,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-10-11 14:35:46,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1251, Unknown=0, NotChecked=0, Total=1482 [2024-10-11 14:35:46,662 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-10-11 14:35:46,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 98 transitions, 815 flow. Second operand has 39 states, 39 states have (on average 11.153846153846153) internal successors, (435), 39 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:46,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:46,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-10-11 14:35:46,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:36:05,003 INFO L124 PetriNetUnfolderBase]: 29777/50589 cut-off events. [2024-10-11 14:36:05,003 INFO L125 PetriNetUnfolderBase]: For 359709/360413 co-relation queries the response was YES. [2024-10-11 14:36:05,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234776 conditions, 50589 events. 29777/50589 cut-off events. For 359709/360413 co-relation queries the response was YES. Maximal size of possible extension queue 1302. Compared 402482 event pairs, 2028 based on Foata normal form. 1964/52446 useless extension candidates. Maximal degree in co-relation 234727. Up to 9635 conditions per place. [2024-10-11 14:36:05,355 INFO L140 encePairwiseOnDemand]: 22/36 looper letters, 902 selfloop transitions, 536 changer transitions 276/1726 dead transitions. [2024-10-11 14:36:05,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 1726 transitions, 16944 flow [2024-10-11 14:36:05,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2024-10-11 14:36:05,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2024-10-11 14:36:05,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 2827 transitions. [2024-10-11 14:36:05,369 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4759259259259259 [2024-10-11 14:36:05,370 INFO L175 Difference]: Start difference. First operand has 127 places, 98 transitions, 815 flow. Second operand 165 states and 2827 transitions. [2024-10-11 14:36:05,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 1726 transitions, 16944 flow [2024-10-11 14:36:05,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 1726 transitions, 16346 flow, removed 274 selfloop flow, removed 7 redundant places. [2024-10-11 14:36:05,815 INFO L231 Difference]: Finished difference. Result has 326 places, 673 transitions, 8637 flow [2024-10-11 14:36:05,815 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=789, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=165, PETRI_FLOW=8637, PETRI_PLACES=326, PETRI_TRANSITIONS=673} [2024-10-11 14:36:05,816 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 288 predicate places. [2024-10-11 14:36:05,816 INFO L471 AbstractCegarLoop]: Abstraction has has 326 places, 673 transitions, 8637 flow [2024-10-11 14:36:05,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 11.153846153846153) internal successors, (435), 39 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:36:05,816 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:36:05,817 INFO L204 CegarLoopForPetriNet]: trace histogram [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] [2024-10-11 14:36:05,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-11 14:36:06,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 14:36:06,018 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)] === [2024-10-11 14:36:06,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:36:06,018 INFO L85 PathProgramCache]: Analyzing trace with hash 319025348, now seen corresponding path program 3 times [2024-10-11 14:36:06,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:36:06,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972349277] [2024-10-11 14:36:06,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:36:06,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:36:06,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:36:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:36:07,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:36:07,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972349277] [2024-10-11 14:36:07,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972349277] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:36:07,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513339506] [2024-10-11 14:36:07,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:36:07,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:36:07,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:36:07,081 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:36:07,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 14:36:07,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-11 14:36:07,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:36:07,168 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-10-11 14:36:07,169 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:36:07,693 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:36:07,693 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:36:08,148 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:36:08,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-10-11 14:36:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:36:08,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513339506] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:36:08,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:36:08,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 38 [2024-10-11 14:36:08,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410603685] [2024-10-11 14:36:08,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:36:08,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-10-11 14:36:08,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:36:08,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-10-11 14:36:08,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1284, Unknown=0, NotChecked=0, Total=1482 [2024-10-11 14:36:08,722 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-10-11 14:36:08,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 673 transitions, 8637 flow. Second operand has 39 states, 39 states have (on average 11.307692307692308) internal successors, (441), 39 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:36:08,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:36:08,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-10-11 14:36:08,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:36:31,669 INFO L124 PetriNetUnfolderBase]: 51631/89267 cut-off events. [2024-10-11 14:36:31,669 INFO L125 PetriNetUnfolderBase]: For 5043547/5044721 co-relation queries the response was YES. [2024-10-11 14:36:32,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 495143 conditions, 89267 events. 51631/89267 cut-off events. For 5043547/5044721 co-relation queries the response was YES. Maximal size of possible extension queue 1680. Compared 771979 event pairs, 6254 based on Foata normal form. 6836/95918 useless extension candidates. Maximal degree in co-relation 486797. Up to 17673 conditions per place. [2024-10-11 14:36:33,088 INFO L140 encePairwiseOnDemand]: 22/36 looper letters, 811 selfloop transitions, 440 changer transitions 1681/2944 dead transitions. [2024-10-11 14:36:33,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 2944 transitions, 40716 flow [2024-10-11 14:36:33,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-10-11 14:36:33,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-10-11 14:36:33,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 820 transitions. [2024-10-11 14:36:33,090 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4846335697399527 [2024-10-11 14:36:33,091 INFO L175 Difference]: Start difference. First operand has 326 places, 673 transitions, 8637 flow. Second operand 47 states and 820 transitions. [2024-10-11 14:36:33,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 2944 transitions, 40716 flow