./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4f9af400 extending candidate: java ['java'] extending candidate: /usr/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/oracle-jdk-bin-*/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/openjdk-*/bin/java ['java', '/usr/bin/java'] extending candidate: /usr/lib/jvm/java-*-openjdk-amd64/bin/java ['java', '/usr/bin/java', '/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java', '/usr/lib/jvm/java-17-openjdk-amd64/bin/java', '/usr/lib/jvm/java-11-openjdk-amd64/bin/java', '/usr/lib/jvm/java-1.17.0-openjdk-amd64/bin/java'] ['/root/.sdkman/candidates/java/21.0.5-tem/bin/java', '-Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config', '-Xmx15G', '-Xms4m', '-jar', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar', '-data', '@noDefault', '-ultimatedata', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data', '-tc', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml', '-i', '../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c', '-s', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf', '--cacsl2boogietranslator.entry.function', 'main', '--witnessprinter.witness.directory', '/storage/repos/ultimate-jdk21/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())) )\n\n', '--witnessprinter.graph.data.producer', 'Automizer', '--witnessprinter.graph.data.architecture', '32bit', '--witnessprinter.graph.data.programhash', 'bc55f480d2dabcba35697f502078f181c178ae095f610e1cdbc5d03f14d18670'] Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/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 bc55f480d2dabcba35697f502078f181c178ae095f610e1cdbc5d03f14d18670 --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-07 11:27:01,232 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-07 11:27:01,305 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-07 11:27:01,311 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-07 11:27:01,311 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-07 11:27:01,332 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-07 11:27:01,332 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-07 11:27:01,333 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-07 11:27:01,333 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-07 11:27:01,333 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-07 11:27:01,333 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-07 11:27:01,333 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-07 11:27:01,333 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-07 11:27:01,333 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-07 11:27:01,334 INFO L153 SettingsManager]: * Use SBE=true [2024-11-07 11:27:01,334 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-07 11:27:01,334 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-07 11:27:01,334 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-07 11:27:01,334 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-07 11:27:01,334 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-07 11:27:01,334 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-07 11:27:01,334 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-07 11:27:01,334 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-07 11:27:01,334 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-07 11:27:01,334 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-07 11:27:01,334 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-07 11:27:01,335 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-07 11:27:01,335 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-07 11:27:01,335 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-07 11:27:01,335 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-07 11:27:01,335 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-07 11:27:01,335 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-07 11:27:01,335 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 11:27:01,335 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-07 11:27:01,335 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-07 11:27:01,335 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-07 11:27:01,335 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-07 11:27:01,335 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-07 11:27:01,336 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-07 11:27:01,336 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-07 11:27:01,336 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-07 11:27:01,336 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-07 11:27:01,336 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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-jdk21/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 -> bc55f480d2dabcba35697f502078f181c178ae095f610e1cdbc5d03f14d18670 [2024-11-07 11:27:01,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-07 11:27:01,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-07 11:27:01,613 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-07 11:27:01,614 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-07 11:27:01,614 INFO L274 PluginConnector]: CDTParser initialized [2024-11-07 11:27:01,615 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2024-11-07 11:27:02,867 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-07 11:27:03,022 INFO L384 CDTParser]: Found 1 translation units. [2024-11-07 11:27:03,023 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2024-11-07 11:27:03,029 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/142b7b463/03468942eae44563bb8237e7a1f7f277/FLAG28c123ce1 [2024-11-07 11:27:03,042 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/142b7b463/03468942eae44563bb8237e7a1f7f277 [2024-11-07 11:27:03,044 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-07 11:27:03,046 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-07 11:27:03,047 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-07 11:27:03,048 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-07 11:27:03,051 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-07 11:27:03,051 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 11:27:03" (1/1) ... [2024-11-07 11:27:03,052 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4390cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:27:03, skipping insertion in model container [2024-11-07 11:27:03,052 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 11:27:03" (1/1) ... [2024-11-07 11:27:03,066 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-07 11:27:03,194 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2423,2436] [2024-11-07 11:27:03,204 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 11:27:03,212 INFO L200 MainTranslator]: Completed pre-run [2024-11-07 11:27:03,227 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2423,2436] [2024-11-07 11:27:03,233 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 11:27:03,244 INFO L204 MainTranslator]: Completed translation [2024-11-07 11:27:03,245 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:27:03 WrapperNode [2024-11-07 11:27:03,246 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-07 11:27:03,247 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-07 11:27:03,247 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-07 11:27:03,247 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-07 11:27:03,252 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:27:03" (1/1) ... [2024-11-07 11:27:03,258 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:27:03" (1/1) ... [2024-11-07 11:27:03,277 INFO L138 Inliner]: procedures = 21, calls = 21, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 135 [2024-11-07 11:27:03,281 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-07 11:27:03,282 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-07 11:27:03,282 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-07 11:27:03,282 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-07 11:27:03,290 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:27:03" (1/1) ... [2024-11-07 11:27:03,290 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:27:03" (1/1) ... [2024-11-07 11:27:03,292 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:27:03" (1/1) ... [2024-11-07 11:27:03,310 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]. [2024-11-07 11:27:03,312 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:27:03" (1/1) ... [2024-11-07 11:27:03,312 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:27:03" (1/1) ... [2024-11-07 11:27:03,316 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:27:03" (1/1) ... [2024-11-07 11:27:03,320 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:27:03" (1/1) ... [2024-11-07 11:27:03,325 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:27:03" (1/1) ... [2024-11-07 11:27:03,326 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:27:03" (1/1) ... [2024-11-07 11:27:03,327 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-07 11:27:03,332 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-07 11:27:03,332 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-07 11:27:03,332 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-07 11:27:03,333 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:27:03" (1/1) ... [2024-11-07 11:27:03,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 11:27:03,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 11:27:03,362 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-07 11:27:03,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-07 11:27:03,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-07 11:27:03,385 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-07 11:27:03,386 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-07 11:27:03,386 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-07 11:27:03,386 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-07 11:27:03,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-07 11:27:03,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-07 11:27:03,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-07 11:27:03,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-07 11:27:03,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-07 11:27:03,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-07 11:27:03,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-07 11:27:03,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-07 11:27:03,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-07 11:27:03,388 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-07 11:27:03,472 INFO L238 CfgBuilder]: Building ICFG [2024-11-07 11:27:03,474 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-07 11:27:03,687 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-07 11:27:03,687 INFO L287 CfgBuilder]: Performing block encoding [2024-11-07 11:27:03,844 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-07 11:27:03,844 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-07 11:27:03,845 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 11:27:03 BoogieIcfgContainer [2024-11-07 11:27:03,845 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-07 11:27:03,846 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-07 11:27:03,846 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-07 11:27:03,854 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-07 11:27:03,854 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 11:27:03" (1/3) ... [2024-11-07 11:27:03,854 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76b04283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 11:27:03, skipping insertion in model container [2024-11-07 11:27:03,855 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:27:03" (2/3) ... [2024-11-07 11:27:03,855 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76b04283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 11:27:03, skipping insertion in model container [2024-11-07 11:27:03,855 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 11:27:03" (3/3) ... [2024-11-07 11:27:03,856 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2024-11-07 11:27:03,866 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-07 11:27:03,867 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-07 11:27:03,867 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-07 11:27:03,914 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-07 11:27:03,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 36 transitions, 86 flow [2024-11-07 11:27:03,966 INFO L124 PetriNetUnfolderBase]: 5/34 cut-off events. [2024-11-07 11:27:03,969 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-07 11:27:03,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 34 events. 5/34 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 37 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-11-07 11:27:03,972 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 36 transitions, 86 flow [2024-11-07 11:27:03,976 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 33 transitions, 78 flow [2024-11-07 11:27:03,984 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 11:27:03,996 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;@fb3b0cf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 11:27:03,996 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-07 11:27:04,012 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 11:27:04,013 INFO L124 PetriNetUnfolderBase]: 5/32 cut-off events. [2024-11-07 11:27:04,013 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-07 11:27:04,013 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:27:04,014 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:27:04,014 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-07 11:27:04,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:27:04,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1803493828, now seen corresponding path program 1 times [2024-11-07 11:27:04,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:27:04,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361952763] [2024-11-07 11:27:04,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:27:04,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:27:04,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:04,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:04,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:27:04,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361952763] [2024-11-07 11:27:04,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361952763] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 11:27:04,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 11:27:04,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 11:27:04,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417625652] [2024-11-07 11:27:04,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 11:27:04,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-07 11:27:04,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:27:04,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-07 11:27:04,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-07 11:27:04,208 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 36 [2024-11-07 11:27:04,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 78 flow. Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:27:04,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:27:04,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 36 [2024-11-07 11:27:04,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:27:04,335 INFO L124 PetriNetUnfolderBase]: 203/343 cut-off events. [2024-11-07 11:27:04,335 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-11-07 11:27:04,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675 conditions, 343 events. 203/343 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1236 event pairs, 137 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 599. Up to 306 conditions per place. [2024-11-07 11:27:04,339 INFO L140 encePairwiseOnDemand]: 35/36 looper letters, 24 selfloop transitions, 0 changer transitions 0/32 dead transitions. [2024-11-07 11:27:04,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 124 flow [2024-11-07 11:27:04,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-07 11:27:04,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-07 11:27:04,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 45 transitions. [2024-11-07 11:27:04,350 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-07 11:27:04,355 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 78 flow. Second operand 2 states and 45 transitions. [2024-11-07 11:27:04,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 124 flow [2024-11-07 11:27:04,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 32 transitions, 116 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-07 11:27:04,360 INFO L231 Difference]: Finished difference. Result has 32 places, 32 transitions, 68 flow [2024-11-07 11:27:04,361 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=68, PETRI_PLACES=32, PETRI_TRANSITIONS=32} [2024-11-07 11:27:04,364 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, -3 predicate places. [2024-11-07 11:27:04,365 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 32 transitions, 68 flow [2024-11-07 11:27:04,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:27:04,365 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:27:04,365 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:27:04,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-07 11:27:04,365 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-07 11:27:04,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:27:04,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1165612234, now seen corresponding path program 1 times [2024-11-07 11:27:04,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:27:04,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080479569] [2024-11-07 11:27:04,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:27:04,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:27:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:04,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:04,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:27:04,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080479569] [2024-11-07 11:27:04,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080479569] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 11:27:04,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 11:27:04,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 11:27:04,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069161947] [2024-11-07 11:27:04,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 11:27:04,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 11:27:04,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:27:04,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 11:27:04,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 11:27:04,528 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 36 [2024-11-07 11:27:04,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 32 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:27:04,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:27:04,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 36 [2024-11-07 11:27:04,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:27:04,657 INFO L124 PetriNetUnfolderBase]: 278/494 cut-off events. [2024-11-07 11:27:04,657 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-07 11:27:04,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 968 conditions, 494 events. 278/494 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2133 event pairs, 108 based on Foata normal form. 1/414 useless extension candidates. Maximal degree in co-relation 965. Up to 252 conditions per place. [2024-11-07 11:27:04,662 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 38 selfloop transitions, 2 changer transitions 2/50 dead transitions. [2024-11-07 11:27:04,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 50 transitions, 191 flow [2024-11-07 11:27:04,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 11:27:04,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 11:27:04,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-11-07 11:27:04,663 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6759259259259259 [2024-11-07 11:27:04,664 INFO L175 Difference]: Start difference. First operand has 32 places, 32 transitions, 68 flow. Second operand 3 states and 73 transitions. [2024-11-07 11:27:04,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 50 transitions, 191 flow [2024-11-07 11:27:04,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 50 transitions, 191 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-07 11:27:04,667 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 80 flow [2024-11-07 11:27:04,668 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2024-11-07 11:27:04,668 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 0 predicate places. [2024-11-07 11:27:04,668 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 80 flow [2024-11-07 11:27:04,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:27:04,669 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:27:04,669 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:27:04,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-07 11:27:04,669 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-07 11:27:04,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:27:04,670 INFO L85 PathProgramCache]: Analyzing trace with hash -519027332, now seen corresponding path program 1 times [2024-11-07 11:27:04,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:27:04,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252115572] [2024-11-07 11:27:04,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:27:04,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:27:04,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:04,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:27:04,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252115572] [2024-11-07 11:27:04,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252115572] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 11:27:04,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 11:27:04,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 11:27:04,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780194449] [2024-11-07 11:27:04,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 11:27:04,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 11:27:04,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:27:04,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 11:27:04,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 11:27:04,741 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2024-11-07 11:27:04,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:27:04,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:27:04,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2024-11-07 11:27:04,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:27:04,821 INFO L124 PetriNetUnfolderBase]: 282/531 cut-off events. [2024-11-07 11:27:04,821 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-07 11:27:04,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 531 events. 282/531 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1970 event pairs, 114 based on Foata normal form. 0/444 useless extension candidates. Maximal degree in co-relation 1088. Up to 341 conditions per place. [2024-11-07 11:27:04,824 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 33 selfloop transitions, 6 changer transitions 1/46 dead transitions. [2024-11-07 11:27:04,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 190 flow [2024-11-07 11:27:04,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 11:27:04,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 11:27:04,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2024-11-07 11:27:04,825 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-11-07 11:27:04,825 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 80 flow. Second operand 3 states and 64 transitions. [2024-11-07 11:27:04,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 190 flow [2024-11-07 11:27:04,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 46 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 11:27:04,826 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 106 flow [2024-11-07 11:27:04,826 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2024-11-07 11:27:04,826 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2024-11-07 11:27:04,826 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 106 flow [2024-11-07 11:27:04,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:27:04,827 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:27:04,827 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:27:04,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-07 11:27:04,827 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-07 11:27:04,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:27:04,827 INFO L85 PathProgramCache]: Analyzing trace with hash -2097907175, now seen corresponding path program 1 times [2024-11-07 11:27:04,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:27:04,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458405842] [2024-11-07 11:27:04,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:27:04,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:27:04,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 11:27:04,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:27:04,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458405842] [2024-11-07 11:27:04,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458405842] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 11:27:04,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 11:27:04,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 11:27:04,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088236460] [2024-11-07 11:27:04,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 11:27:04,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 11:27:04,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:27:04,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 11:27:04,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 11:27:04,991 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 36 [2024-11-07 11:27:04,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:27:04,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:27:04,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 36 [2024-11-07 11:27:04,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:27:05,089 INFO L124 PetriNetUnfolderBase]: 262/514 cut-off events. [2024-11-07 11:27:05,090 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2024-11-07 11:27:05,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1184 conditions, 514 events. 262/514 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1912 event pairs, 203 based on Foata normal form. 0/454 useless extension candidates. Maximal degree in co-relation 1178. Up to 471 conditions per place. [2024-11-07 11:27:05,093 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 25 selfloop transitions, 3 changer transitions 9/45 dead transitions. [2024-11-07 11:27:05,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 45 transitions, 202 flow [2024-11-07 11:27:05,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 11:27:05,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 11:27:05,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 75 transitions. [2024-11-07 11:27:05,094 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-11-07 11:27:05,094 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 106 flow. Second operand 4 states and 75 transitions. [2024-11-07 11:27:05,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 45 transitions, 202 flow [2024-11-07 11:27:05,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 45 transitions, 196 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 11:27:05,096 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 118 flow [2024-11-07 11:27:05,096 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=118, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2024-11-07 11:27:05,097 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 6 predicate places. [2024-11-07 11:27:05,097 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 118 flow [2024-11-07 11:27:05,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:27:05,097 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:27:05,098 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:27:05,098 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-07 11:27:05,098 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-07 11:27:05,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:27:05,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1960581350, now seen corresponding path program 1 times [2024-11-07 11:27:05,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:27:05,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737244230] [2024-11-07 11:27:05,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:27:05,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:27:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:05,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:05,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:27:05,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737244230] [2024-11-07 11:27:05,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737244230] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 11:27:05,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103772097] [2024-11-07 11:27:05,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:27:05,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:27:05,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 11:27:05,851 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 11:27:05,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-07 11:27:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:05,924 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-07 11:27:05,927 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 11:27:05,993 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 [2024-11-07 11:27:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:06,284 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 11:27:06,748 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 [2024-11-07 11:27:06,762 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 11:27:06,763 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 [2024-11-07 11:27:06,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:06,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103772097] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 11:27:06,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 11:27:06,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2024-11-07 11:27:06,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42288972] [2024-11-07 11:27:06,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 11:27:06,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-07 11:27:06,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:27:06,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-07 11:27:06,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2024-11-07 11:27:06,928 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2024-11-07 11:27:06,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 118 flow. Second operand has 26 states, 26 states have (on average 10.538461538461538) internal successors, (274), 26 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:27:06,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:27:06,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2024-11-07 11:27:06,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:27:08,847 INFO L124 PetriNetUnfolderBase]: 796/1505 cut-off events. [2024-11-07 11:27:08,847 INFO L125 PetriNetUnfolderBase]: For 215/215 co-relation queries the response was YES. [2024-11-07 11:27:08,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3440 conditions, 1505 events. 796/1505 cut-off events. For 215/215 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7997 event pairs, 63 based on Foata normal form. 2/1368 useless extension candidates. Maximal degree in co-relation 3432. Up to 308 conditions per place. [2024-11-07 11:27:08,853 INFO L140 encePairwiseOnDemand]: 20/36 looper letters, 149 selfloop transitions, 82 changer transitions 59/296 dead transitions. [2024-11-07 11:27:08,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 296 transitions, 1426 flow [2024-11-07 11:27:08,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-07 11:27:08,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-11-07 11:27:08,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 606 transitions. [2024-11-07 11:27:08,859 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-11-07 11:27:08,859 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 118 flow. Second operand 40 states and 606 transitions. [2024-11-07 11:27:08,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 296 transitions, 1426 flow [2024-11-07 11:27:08,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 296 transitions, 1376 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-11-07 11:27:08,867 INFO L231 Difference]: Finished difference. Result has 104 places, 116 transitions, 752 flow [2024-11-07 11:27:08,867 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=752, PETRI_PLACES=104, PETRI_TRANSITIONS=116} [2024-11-07 11:27:08,867 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 69 predicate places. [2024-11-07 11:27:08,868 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 116 transitions, 752 flow [2024-11-07 11:27:08,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 10.538461538461538) internal successors, (274), 26 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:27:08,868 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:27:08,868 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:27:08,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-07 11:27:09,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:27:09,073 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-07 11:27:09,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:27:09,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1366326741, now seen corresponding path program 1 times [2024-11-07 11:27:09,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:27:09,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308031952] [2024-11-07 11:27:09,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:27:09,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:27:09,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:09,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 11:27:09,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:27:09,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308031952] [2024-11-07 11:27:09,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308031952] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 11:27:09,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 11:27:09,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 11:27:09,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564948970] [2024-11-07 11:27:09,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 11:27:09,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 11:27:09,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:27:09,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 11:27:09,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 11:27:09,137 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-11-07 11:27:09,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 116 transitions, 752 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:27:09,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:27:09,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-11-07 11:27:09,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:27:09,294 INFO L124 PetriNetUnfolderBase]: 657/1222 cut-off events. [2024-11-07 11:27:09,294 INFO L125 PetriNetUnfolderBase]: For 4376/4376 co-relation queries the response was YES. [2024-11-07 11:27:09,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4517 conditions, 1222 events. 657/1222 cut-off events. For 4376/4376 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 6081 event pairs, 203 based on Foata normal form. 4/1225 useless extension candidates. Maximal degree in co-relation 4484. Up to 1065 conditions per place. [2024-11-07 11:27:09,325 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 104 selfloop transitions, 2 changer transitions 4/117 dead transitions. [2024-11-07 11:27:09,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 117 transitions, 976 flow [2024-11-07 11:27:09,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 11:27:09,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 11:27:09,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2024-11-07 11:27:09,326 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-11-07 11:27:09,327 INFO L175 Difference]: Start difference. First operand has 104 places, 116 transitions, 752 flow. Second operand 3 states and 66 transitions. [2024-11-07 11:27:09,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 117 transitions, 976 flow [2024-11-07 11:27:09,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 117 transitions, 877 flow, removed 41 selfloop flow, removed 15 redundant places. [2024-11-07 11:27:09,344 INFO L231 Difference]: Finished difference. Result has 80 places, 94 transitions, 529 flow [2024-11-07 11:27:09,344 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=529, PETRI_PLACES=80, PETRI_TRANSITIONS=94} [2024-11-07 11:27:09,344 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 45 predicate places. [2024-11-07 11:27:09,345 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 94 transitions, 529 flow [2024-11-07 11:27:09,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:27:09,345 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:27:09,345 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:27:09,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-07 11:27:09,345 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-07 11:27:09,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:27:09,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1340435701, now seen corresponding path program 2 times [2024-11-07 11:27:09,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:27:09,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797705935] [2024-11-07 11:27:09,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:27:09,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:27:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:09,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:09,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:27:09,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797705935] [2024-11-07 11:27:09,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797705935] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 11:27:09,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203574257] [2024-11-07 11:27:09,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 11:27:09,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:27:09,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 11:27:09,926 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 11:27:09,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-07 11:27:09,991 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 11:27:09,991 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 11:27:09,992 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-07 11:27:09,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 11:27:10,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 11:27:10,082 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 11:27:10,141 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 11:27:10,141 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 [2024-11-07 11:27:10,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-07 11:27:10,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203574257] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 11:27:10,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 11:27:10,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 6] total 19 [2024-11-07 11:27:10,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676003699] [2024-11-07 11:27:10,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 11:27:10,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-07 11:27:10,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:27:10,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-07 11:27:10,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2024-11-07 11:27:10,240 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2024-11-07 11:27:10,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 94 transitions, 529 flow. Second operand has 20 states, 20 states have (on average 11.25) internal successors, (225), 20 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:27:10,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:27:10,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2024-11-07 11:27:10,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:27:10,870 INFO L124 PetriNetUnfolderBase]: 821/1582 cut-off events. [2024-11-07 11:27:10,870 INFO L125 PetriNetUnfolderBase]: For 2841/2841 co-relation queries the response was YES. [2024-11-07 11:27:10,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5395 conditions, 1582 events. 821/1582 cut-off events. For 2841/2841 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8637 event pairs, 85 based on Foata normal form. 2/1569 useless extension candidates. Maximal degree in co-relation 5370. Up to 601 conditions per place. [2024-11-07 11:27:10,880 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 141 selfloop transitions, 34 changer transitions 14/196 dead transitions. [2024-11-07 11:27:10,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 196 transitions, 1467 flow [2024-11-07 11:27:10,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-07 11:27:10,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-07 11:27:10,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 251 transitions. [2024-11-07 11:27:10,882 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4357638888888889 [2024-11-07 11:27:10,882 INFO L175 Difference]: Start difference. First operand has 80 places, 94 transitions, 529 flow. Second operand 16 states and 251 transitions. [2024-11-07 11:27:10,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 196 transitions, 1467 flow [2024-11-07 11:27:10,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 196 transitions, 1464 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 11:27:10,897 INFO L231 Difference]: Finished difference. Result has 98 places, 106 transitions, 707 flow [2024-11-07 11:27:10,898 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=707, PETRI_PLACES=98, PETRI_TRANSITIONS=106} [2024-11-07 11:27:10,898 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 63 predicate places. [2024-11-07 11:27:10,898 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 106 transitions, 707 flow [2024-11-07 11:27:10,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.25) internal successors, (225), 20 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:27:10,898 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:27:10,898 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:27:10,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-07 11:27:11,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:27:11,099 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-07 11:27:11,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:27:11,100 INFO L85 PathProgramCache]: Analyzing trace with hash 2012483246, now seen corresponding path program 3 times [2024-11-07 11:27:11,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:27:11,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908674120] [2024-11-07 11:27:11,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:27:11,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:27:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:11,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 11:27:11,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:27:11,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908674120] [2024-11-07 11:27:11,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908674120] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 11:27:11,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84728094] [2024-11-07 11:27:11,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-07 11:27:11,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:27:11,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 11:27:11,235 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 11:27:11,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-07 11:27:11,305 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-07 11:27:11,305 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 11:27:11,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-07 11:27:11,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 11:27:11,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 11:27:11,347 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 11:27:11,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 11:27:11,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84728094] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 11:27:11,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 11:27:11,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 9 [2024-11-07 11:27:11,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292573711] [2024-11-07 11:27:11,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 11:27:11,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-07 11:27:11,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:27:11,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-07 11:27:11,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-07 11:27:11,393 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2024-11-07 11:27:11,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 106 transitions, 707 flow. Second operand has 9 states, 9 states have (on average 13.222222222222221) internal successors, (119), 9 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:27:11,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:27:11,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2024-11-07 11:27:11,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:27:11,786 INFO L124 PetriNetUnfolderBase]: 1177/2156 cut-off events. [2024-11-07 11:27:11,787 INFO L125 PetriNetUnfolderBase]: For 6653/6653 co-relation queries the response was YES. [2024-11-07 11:27:11,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8260 conditions, 2156 events. 1177/2156 cut-off events. For 6653/6653 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 10641 event pairs, 294 based on Foata normal form. 62/2205 useless extension candidates. Maximal degree in co-relation 8231. Up to 703 conditions per place. [2024-11-07 11:27:11,804 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 98 selfloop transitions, 34 changer transitions 55/194 dead transitions. [2024-11-07 11:27:11,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 194 transitions, 1618 flow [2024-11-07 11:27:11,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-07 11:27:11,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-07 11:27:11,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2024-11-07 11:27:11,805 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-11-07 11:27:11,805 INFO L175 Difference]: Start difference. First operand has 98 places, 106 transitions, 707 flow. Second operand 12 states and 200 transitions. [2024-11-07 11:27:11,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 194 transitions, 1618 flow [2024-11-07 11:27:11,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 194 transitions, 1554 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-11-07 11:27:11,825 INFO L231 Difference]: Finished difference. Result has 105 places, 96 transitions, 748 flow [2024-11-07 11:27:11,825 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=748, PETRI_PLACES=105, PETRI_TRANSITIONS=96} [2024-11-07 11:27:11,827 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 70 predicate places. [2024-11-07 11:27:11,827 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 96 transitions, 748 flow [2024-11-07 11:27:11,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.222222222222221) internal successors, (119), 9 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:27:11,827 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:27:11,827 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:27:11,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-07 11:27:12,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:27:12,028 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-07 11:27:12,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:27:12,028 INFO L85 PathProgramCache]: Analyzing trace with hash -371141210, now seen corresponding path program 4 times [2024-11-07 11:27:12,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:27:12,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492200594] [2024-11-07 11:27:12,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:27:12,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:27:12,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:12,150 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 11:27:12,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:27:12,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492200594] [2024-11-07 11:27:12,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492200594] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 11:27:12,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 11:27:12,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 11:27:12,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549851123] [2024-11-07 11:27:12,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 11:27:12,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 11:27:12,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:27:12,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 11:27:12,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 11:27:12,152 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-11-07 11:27:12,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 96 transitions, 748 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:27:12,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:27:12,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-11-07 11:27:12,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:27:12,467 INFO L124 PetriNetUnfolderBase]: 1390/2528 cut-off events. [2024-11-07 11:27:12,467 INFO L125 PetriNetUnfolderBase]: For 9703/9703 co-relation queries the response was YES. [2024-11-07 11:27:12,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10058 conditions, 2528 events. 1390/2528 cut-off events. For 9703/9703 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 12500 event pairs, 302 based on Foata normal form. 127/2654 useless extension candidates. Maximal degree in co-relation 10026. Up to 1259 conditions per place. [2024-11-07 11:27:12,485 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 109 selfloop transitions, 4 changer transitions 2/122 dead transitions. [2024-11-07 11:27:12,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 122 transitions, 1179 flow [2024-11-07 11:27:12,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 11:27:12,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 11:27:12,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2024-11-07 11:27:12,491 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5347222222222222 [2024-11-07 11:27:12,491 INFO L175 Difference]: Start difference. First operand has 105 places, 96 transitions, 748 flow. Second operand 4 states and 77 transitions. [2024-11-07 11:27:12,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 122 transitions, 1179 flow [2024-11-07 11:27:12,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 122 transitions, 1051 flow, removed 30 selfloop flow, removed 16 redundant places. [2024-11-07 11:27:12,515 INFO L231 Difference]: Finished difference. Result has 81 places, 95 transitions, 664 flow [2024-11-07 11:27:12,516 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=664, PETRI_PLACES=81, PETRI_TRANSITIONS=95} [2024-11-07 11:27:12,517 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 46 predicate places. [2024-11-07 11:27:12,517 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 95 transitions, 664 flow [2024-11-07 11:27:12,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:27:12,517 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:27:12,517 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 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] [2024-11-07 11:27:12,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-07 11:27:12,517 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-07 11:27:12,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:27:12,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1633699317, now seen corresponding path program 1 times [2024-11-07 11:27:12,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:27:12,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106620806] [2024-11-07 11:27:12,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:27:12,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:27:12,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:13,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:27:13,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106620806] [2024-11-07 11:27:13,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106620806] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 11:27:13,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215137481] [2024-11-07 11:27:13,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:27:13,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:27:13,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 11:27:13,500 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 11:27:13,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-07 11:27:13,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:13,584 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-07 11:27:13,586 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 11:27:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:14,239 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 11:27:14,656 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 11:27:14,657 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 [2024-11-07 11:27:15,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:15,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215137481] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 11:27:15,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 11:27:15,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 43 [2024-11-07 11:27:15,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679935503] [2024-11-07 11:27:15,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 11:27:15,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-07 11:27:15,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:27:15,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-07 11:27:15,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1600, Unknown=0, NotChecked=0, Total=1892 [2024-11-07 11:27:15,134 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2024-11-07 11:27:15,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 95 transitions, 664 flow. Second operand has 44 states, 44 states have (on average 10.113636363636363) internal successors, (445), 44 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:27:15,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:27:15,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2024-11-07 11:27:15,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:27:39,779 INFO L124 PetriNetUnfolderBase]: 13949/26223 cut-off events. [2024-11-07 11:27:39,779 INFO L125 PetriNetUnfolderBase]: For 67036/67036 co-relation queries the response was YES. [2024-11-07 11:27:39,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94494 conditions, 26223 events. 13949/26223 cut-off events. For 67036/67036 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 214283 event pairs, 963 based on Foata normal form. 207/26345 useless extension candidates. Maximal degree in co-relation 94469. Up to 6051 conditions per place. [2024-11-07 11:27:39,916 INFO L140 encePairwiseOnDemand]: 20/36 looper letters, 1131 selfloop transitions, 1313 changer transitions 486/2938 dead transitions. [2024-11-07 11:27:39,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 2938 transitions, 23492 flow [2024-11-07 11:27:39,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 349 states. [2024-11-07 11:27:39,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2024-11-07 11:27:39,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 5038 transitions. [2024-11-07 11:27:39,927 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.400986946832219 [2024-11-07 11:27:39,927 INFO L175 Difference]: Start difference. First operand has 81 places, 95 transitions, 664 flow. Second operand 349 states and 5038 transitions. [2024-11-07 11:27:39,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 2938 transitions, 23492 flow [2024-11-07 11:27:40,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 2938 transitions, 23074 flow, removed 207 selfloop flow, removed 2 redundant places. [2024-11-07 11:27:40,081 INFO L231 Difference]: Finished difference. Result has 581 places, 1459 transitions, 15406 flow [2024-11-07 11:27:40,081 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=349, PETRI_FLOW=15406, PETRI_PLACES=581, PETRI_TRANSITIONS=1459} [2024-11-07 11:27:40,082 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 546 predicate places. [2024-11-07 11:27:40,082 INFO L471 AbstractCegarLoop]: Abstraction has has 581 places, 1459 transitions, 15406 flow [2024-11-07 11:27:40,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 10.113636363636363) internal successors, (445), 44 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:27:40,083 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:27:40,083 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 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] [2024-11-07 11:27:40,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-07 11:27:40,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-07 11:27:40,284 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-07 11:27:40,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:27:40,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1899916915, now seen corresponding path program 2 times [2024-11-07 11:27:40,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:27:40,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586625195] [2024-11-07 11:27:40,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:27:40,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:27:40,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:41,300 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:41,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:27:41,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586625195] [2024-11-07 11:27:41,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586625195] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 11:27:41,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137250959] [2024-11-07 11:27:41,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 11:27:41,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:27:41,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 11:27:41,302 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 11:27:41,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-07 11:27:41,364 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 11:27:41,364 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 11:27:41,366 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-07 11:27:41,367 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 11:27:41,878 INFO L349 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2024-11-07 11:27:41,879 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 48 treesize of output 21 [2024-11-07 11:27:41,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:41,920 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 11:27:42,363 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-11-07 11:27:42,363 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 60 [2024-11-07 11:27:42,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:42,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137250959] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 11:27:42,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 11:27:42,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 42 [2024-11-07 11:27:42,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573311346] [2024-11-07 11:27:42,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 11:27:42,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-07 11:27:42,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:27:42,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-07 11:27:42,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1560, Unknown=0, NotChecked=0, Total=1806 [2024-11-07 11:27:42,813 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2024-11-07 11:27:42,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 1459 transitions, 15406 flow. Second operand has 43 states, 43 states have (on average 10.13953488372093) internal successors, (436), 43 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:27:42,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:27:42,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2024-11-07 11:27:42,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:28:01,687 INFO L124 PetriNetUnfolderBase]: 22028/40783 cut-off events. [2024-11-07 11:28:01,688 INFO L125 PetriNetUnfolderBase]: For 5750678/5750678 co-relation queries the response was YES. [2024-11-07 11:28:02,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364811 conditions, 40783 events. 22028/40783 cut-off events. For 5750678/5750678 co-relation queries the response was YES. Maximal size of possible extension queue 982. Compared 350404 event pairs, 2622 based on Foata normal form. 69/40622 useless extension candidates. Maximal degree in co-relation 364633. Up to 15108 conditions per place. [2024-11-07 11:28:03,092 INFO L140 encePairwiseOnDemand]: 20/36 looper letters, 1121 selfloop transitions, 2398 changer transitions 108/3635 dead transitions. [2024-11-07 11:28:03,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 662 places, 3635 transitions, 51271 flow [2024-11-07 11:28:03,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2024-11-07 11:28:03,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2024-11-07 11:28:03,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 1474 transitions. [2024-11-07 11:28:03,100 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3936965811965812 [2024-11-07 11:28:03,101 INFO L175 Difference]: Start difference. First operand has 581 places, 1459 transitions, 15406 flow. Second operand 104 states and 1474 transitions. [2024-11-07 11:28:03,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 662 places, 3635 transitions, 51271 flow [2024-11-07 11:28:21,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 631 places, 3635 transitions, 45289 flow, removed 2799 selfloop flow, removed 31 redundant places. [2024-11-07 11:28:21,828 INFO L231 Difference]: Finished difference. Result has 664 places, 3014 transitions, 36039 flow [2024-11-07 11:28:21,829 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=13035, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=938, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=104, PETRI_FLOW=36039, PETRI_PLACES=664, PETRI_TRANSITIONS=3014} [2024-11-07 11:28:21,829 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 629 predicate places. [2024-11-07 11:28:21,829 INFO L471 AbstractCegarLoop]: Abstraction has has 664 places, 3014 transitions, 36039 flow [2024-11-07 11:28:21,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 10.13953488372093) internal successors, (436), 43 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:28:21,830 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:28:21,830 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 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] [2024-11-07 11:28:21,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-07 11:28:22,030 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-07 11:28:22,030 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-07 11:28:22,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:28:22,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1987033207, now seen corresponding path program 3 times [2024-11-07 11:28:22,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:28:22,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801912278] [2024-11-07 11:28:22,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:28:22,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:28:22,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:28:22,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:28:22,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:28:22,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801912278] [2024-11-07 11:28:22,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801912278] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 11:28:22,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396180174] [2024-11-07 11:28:22,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-07 11:28:22,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:28:22,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 11:28:22,722 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 11:28:22,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-07 11:28:22,789 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-07 11:28:22,789 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 11:28:22,791 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-07 11:28:22,792 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 11:28:23,264 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 11:28:23,265 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 30 treesize of output 28 [2024-11-07 11:28:23,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:28:23,386 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 11:28:24,161 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 11:28:24,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 96 treesize of output 125 [2024-11-07 11:28:24,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:28:24,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396180174] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 11:28:24,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 11:28:24,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 49 [2024-11-07 11:28:24,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533407843] [2024-11-07 11:28:24,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 11:28:24,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-07 11:28:24,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:28:24,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-07 11:28:24,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=2085, Unknown=0, NotChecked=0, Total=2450 [2024-11-07 11:28:24,806 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2024-11-07 11:28:24,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 664 places, 3014 transitions, 36039 flow. Second operand has 50 states, 50 states have (on average 9.88) internal successors, (494), 50 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:28:24,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:28:24,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2024-11-07 11:28:24,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand