./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-figure1.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-figure1.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', 'facd7612076746f2d167aef7303c13ba7b66236eba7a99773acf1e3861338848'] 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-figure1.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 facd7612076746f2d167aef7303c13ba7b66236eba7a99773acf1e3861338848 --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-07 11:27:35,433 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-07 11:27:35,555 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-07 11:27:35,564 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-07 11:27:35,564 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-07 11:27:35,593 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-07 11:27:35,595 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-07 11:27:35,596 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-07 11:27:35,596 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-07 11:27:35,597 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-07 11:27:35,597 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-07 11:27:35,597 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-07 11:27:35,598 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-07 11:27:35,598 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-07 11:27:35,598 INFO L153 SettingsManager]: * Use SBE=true [2024-11-07 11:27:35,599 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-07 11:27:35,599 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-07 11:27:35,599 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-07 11:27:35,599 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-07 11:27:35,599 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-07 11:27:35,599 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-07 11:27:35,599 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-07 11:27:35,599 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-07 11:27:35,600 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-07 11:27:35,600 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-07 11:27:35,600 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-07 11:27:35,600 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-07 11:27:35,600 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-07 11:27:35,600 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-07 11:27:35,601 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-07 11:27:35,601 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-07 11:27:35,601 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-07 11:27:35,601 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 11:27:35,601 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-07 11:27:35,602 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-07 11:27:35,602 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-07 11:27:35,602 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-07 11:27:35,602 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-07 11:27:35,602 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-07 11:27:35,602 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-07 11:27:35,602 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-07 11:27:35,602 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-07 11:27:35,602 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 -> facd7612076746f2d167aef7303c13ba7b66236eba7a99773acf1e3861338848 [2024-11-07 11:27:35,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-07 11:27:35,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-07 11:27:35,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-07 11:27:35,921 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-07 11:27:35,921 INFO L274 PluginConnector]: CDTParser initialized [2024-11-07 11:27:35,922 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2024-11-07 11:27:37,281 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-07 11:27:37,514 INFO L384 CDTParser]: Found 1 translation units. [2024-11-07 11:27:37,514 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2024-11-07 11:27:37,525 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/8b0c179ea/335c97a91d3b4cb0b2d7e93332d67721/FLAG7814cdf76 [2024-11-07 11:27:37,848 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/8b0c179ea/335c97a91d3b4cb0b2d7e93332d67721 [2024-11-07 11:27:37,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-07 11:27:37,852 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-07 11:27:37,853 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-07 11:27:37,853 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-07 11:27:37,857 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-07 11:27:37,858 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 11:27:37" (1/1) ... [2024-11-07 11:27:37,858 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@501b7598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:27:37, skipping insertion in model container [2024-11-07 11:27:37,858 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 11:27:37" (1/1) ... [2024-11-07 11:27:37,871 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-07 11:27:38,027 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-figure1.wvr.c[1825,1838] [2024-11-07 11:27:38,030 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 11:27:38,036 INFO L200 MainTranslator]: Completed pre-run [2024-11-07 11:27:38,049 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-figure1.wvr.c[1825,1838] [2024-11-07 11:27:38,050 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 11:27:38,063 INFO L204 MainTranslator]: Completed translation [2024-11-07 11:27:38,065 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:27:38 WrapperNode [2024-11-07 11:27:38,065 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-07 11:27:38,067 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-07 11:27:38,067 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-07 11:27:38,067 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-07 11:27:38,074 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:27:38" (1/1) ... [2024-11-07 11:27:38,080 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:27:38" (1/1) ... [2024-11-07 11:27:38,096 INFO L138 Inliner]: procedures = 18, calls = 10, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2024-11-07 11:27:38,097 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-07 11:27:38,098 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-07 11:27:38,098 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-07 11:27:38,098 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-07 11:27:38,105 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:27:38" (1/1) ... [2024-11-07 11:27:38,106 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:27:38" (1/1) ... [2024-11-07 11:27:38,108 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:27:38" (1/1) ... [2024-11-07 11:27:38,123 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-07 11:27:38,124 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:27:38" (1/1) ... [2024-11-07 11:27:38,124 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:27:38" (1/1) ... [2024-11-07 11:27:38,129 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:27:38" (1/1) ... [2024-11-07 11:27:38,135 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:27:38" (1/1) ... [2024-11-07 11:27:38,138 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:27:38" (1/1) ... [2024-11-07 11:27:38,141 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:27:38" (1/1) ... [2024-11-07 11:27:38,142 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-07 11:27:38,143 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-07 11:27:38,143 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-07 11:27:38,143 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-07 11:27:38,148 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:27:38" (1/1) ... [2024-11-07 11:27:38,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 11:27:38,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 11:27:38,185 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 11:27:38,191 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 11:27:38,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-07 11:27:38,213 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-07 11:27:38,213 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-07 11:27:38,213 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-07 11:27:38,213 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-07 11:27:38,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-07 11:27:38,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-07 11:27:38,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-07 11:27:38,214 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 11:27:38,299 INFO L238 CfgBuilder]: Building ICFG [2024-11-07 11:27:38,300 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-07 11:27:38,424 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-07 11:27:38,425 INFO L287 CfgBuilder]: Performing block encoding [2024-11-07 11:27:38,527 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-07 11:27:38,528 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-07 11:27:38,528 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 11:27:38 BoogieIcfgContainer [2024-11-07 11:27:38,528 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-07 11:27:38,530 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-07 11:27:38,530 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-07 11:27:38,535 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-07 11:27:38,536 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 11:27:37" (1/3) ... [2024-11-07 11:27:38,537 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7192e138 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 11:27:38, skipping insertion in model container [2024-11-07 11:27:38,537 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:27:38" (2/3) ... [2024-11-07 11:27:38,537 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7192e138 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 11:27:38, skipping insertion in model container [2024-11-07 11:27:38,537 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 11:27:38" (3/3) ... [2024-11-07 11:27:38,539 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2024-11-07 11:27:38,555 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-07 11:27:38,555 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-07 11:27:38,555 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-07 11:27:38,604 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-07 11:27:38,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 22 transitions, 58 flow [2024-11-07 11:27:38,664 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2024-11-07 11:27:38,666 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-07 11:27:38,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 2/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-11-07 11:27:38,673 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 22 transitions, 58 flow [2024-11-07 11:27:38,676 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 19 transitions, 50 flow [2024-11-07 11:27:38,681 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 11:27:38,695 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;@269db6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 11:27:38,695 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-07 11:27:38,707 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 11:27:38,707 INFO L124 PetriNetUnfolderBase]: 2/18 cut-off events. [2024-11-07 11:27:38,707 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-07 11:27:38,707 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:27:38,708 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:27:38,710 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 11:27:38,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:27:38,714 INFO L85 PathProgramCache]: Analyzing trace with hash 865412045, now seen corresponding path program 1 times [2024-11-07 11:27:38,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:27:38,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79353369] [2024-11-07 11:27:38,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:27:38,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:27:38,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:38,943 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 11:27:38,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:27:38,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79353369] [2024-11-07 11:27:38,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79353369] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 11:27:38,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 11:27:38,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 11:27:38,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731403435] [2024-11-07 11:27:38,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 11:27:38,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 11:27:38,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:27:38,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 11:27:38,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 11:27:38,983 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-11-07 11:27:38,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 11:27:38,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:27:38,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-11-07 11:27:38,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:27:39,108 INFO L124 PetriNetUnfolderBase]: 86/168 cut-off events. [2024-11-07 11:27:39,109 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-11-07 11:27:39,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 168 events. 86/168 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 506 event pairs, 32 based on Foata normal form. 1/161 useless extension candidates. Maximal degree in co-relation 297. Up to 108 conditions per place. [2024-11-07 11:27:39,112 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 21 selfloop transitions, 2 changer transitions 3/28 dead transitions. [2024-11-07 11:27:39,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 28 transitions, 129 flow [2024-11-07 11:27:39,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 11:27:39,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 11:27:39,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 40 transitions. [2024-11-07 11:27:39,127 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-11-07 11:27:39,128 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 50 flow. Second operand 3 states and 40 transitions. [2024-11-07 11:27:39,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 28 transitions, 129 flow [2024-11-07 11:27:39,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 28 transitions, 115 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-07 11:27:39,135 INFO L231 Difference]: Finished difference. Result has 23 places, 20 transitions, 56 flow [2024-11-07 11:27:39,137 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=23, PETRI_TRANSITIONS=20} [2024-11-07 11:27:39,140 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, -1 predicate places. [2024-11-07 11:27:39,141 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 20 transitions, 56 flow [2024-11-07 11:27:39,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 11:27:39,141 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:27:39,141 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:27:39,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-07 11:27:39,142 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 11:27:39,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:27:39,142 INFO L85 PathProgramCache]: Analyzing trace with hash 528976037, now seen corresponding path program 1 times [2024-11-07 11:27:39,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:27:39,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113416639] [2024-11-07 11:27:39,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:27:39,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:27:39,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:39,302 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 11:27:39,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:27:39,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113416639] [2024-11-07 11:27:39,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113416639] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 11:27:39,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 11:27:39,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-07 11:27:39,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777769986] [2024-11-07 11:27:39,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 11:27:39,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 11:27:39,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:27:39,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 11:27:39,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-07 11:27:39,305 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-07 11:27:39,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions, 56 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 11:27:39,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:27:39,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-07 11:27:39,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:27:39,526 INFO L124 PetriNetUnfolderBase]: 151/272 cut-off events. [2024-11-07 11:27:39,526 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-07 11:27:39,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 272 events. 151/272 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 990 event pairs, 59 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 195. Up to 187 conditions per place. [2024-11-07 11:27:39,529 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 33 selfloop transitions, 7 changer transitions 3/44 dead transitions. [2024-11-07 11:27:39,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 44 transitions, 201 flow [2024-11-07 11:27:39,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 11:27:39,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 11:27:39,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2024-11-07 11:27:39,533 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5363636363636364 [2024-11-07 11:27:39,533 INFO L175 Difference]: Start difference. First operand has 23 places, 20 transitions, 56 flow. Second operand 5 states and 59 transitions. [2024-11-07 11:27:39,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 44 transitions, 201 flow [2024-11-07 11:27:39,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 44 transitions, 197 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 11:27:39,535 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 106 flow [2024-11-07 11:27:39,535 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2024-11-07 11:27:39,539 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2024-11-07 11:27:39,539 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 106 flow [2024-11-07 11:27:39,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 11:27:39,540 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:27:39,540 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:27:39,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-07 11:27:39,541 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 11:27:39,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:27:39,542 INFO L85 PathProgramCache]: Analyzing trace with hash 882982957, now seen corresponding path program 2 times [2024-11-07 11:27:39,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:27:39,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995773132] [2024-11-07 11:27:39,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:27:39,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:27:39,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:39,657 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 11:27:39,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:27:39,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995773132] [2024-11-07 11:27:39,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995773132] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 11:27:39,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 11:27:39,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-07 11:27:39,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445380097] [2024-11-07 11:27:39,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 11:27:39,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-07 11:27:39,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:27:39,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-07 11:27:39,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-07 11:27:39,663 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-07 11:27:39,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 106 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 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 11:27:39,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:27:39,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-07 11:27:39,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:27:39,895 INFO L124 PetriNetUnfolderBase]: 185/329 cut-off events. [2024-11-07 11:27:39,895 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2024-11-07 11:27:39,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 971 conditions, 329 events. 185/329 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1234 event pairs, 4 based on Foata normal form. 13/342 useless extension candidates. Maximal degree in co-relation 435. Up to 148 conditions per place. [2024-11-07 11:27:39,903 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 48 selfloop transitions, 10 changer transitions 1/60 dead transitions. [2024-11-07 11:27:39,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 60 transitions, 345 flow [2024-11-07 11:27:39,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-07 11:27:39,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-07 11:27:39,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2024-11-07 11:27:39,907 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-07 11:27:39,907 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 106 flow. Second operand 7 states and 77 transitions. [2024-11-07 11:27:39,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 60 transitions, 345 flow [2024-11-07 11:27:39,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 60 transitions, 343 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-07 11:27:39,914 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 186 flow [2024-11-07 11:27:39,916 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=186, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2024-11-07 11:27:39,917 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 16 predicate places. [2024-11-07 11:27:39,918 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 186 flow [2024-11-07 11:27:39,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 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 11:27:39,919 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:27:39,919 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:27:39,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-07 11:27:39,920 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 11:27:39,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:27:39,921 INFO L85 PathProgramCache]: Analyzing trace with hash 2138432043, now seen corresponding path program 3 times [2024-11-07 11:27:39,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:27:39,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402770767] [2024-11-07 11:27:39,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:27:39,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:27:39,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:40,037 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 11:27:40,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:27:40,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402770767] [2024-11-07 11:27:40,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402770767] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 11:27:40,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 11:27:40,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-07 11:27:40,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485338499] [2024-11-07 11:27:40,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 11:27:40,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 11:27:40,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:27:40,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 11:27:40,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 11:27:40,042 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-07 11:27:40,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 11:27:40,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:27:40,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-07 11:27:40,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:27:40,178 INFO L124 PetriNetUnfolderBase]: 248/441 cut-off events. [2024-11-07 11:27:40,179 INFO L125 PetriNetUnfolderBase]: For 710/710 co-relation queries the response was YES. [2024-11-07 11:27:40,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1528 conditions, 441 events. 248/441 cut-off events. For 710/710 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1627 event pairs, 86 based on Foata normal form. 2/443 useless extension candidates. Maximal degree in co-relation 991. Up to 194 conditions per place. [2024-11-07 11:27:40,186 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 46 selfloop transitions, 10 changer transitions 2/59 dead transitions. [2024-11-07 11:27:40,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 59 transitions, 439 flow [2024-11-07 11:27:40,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 11:27:40,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 11:27:40,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 55 transitions. [2024-11-07 11:27:40,190 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-07 11:27:40,190 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 186 flow. Second operand 5 states and 55 transitions. [2024-11-07 11:27:40,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 59 transitions, 439 flow [2024-11-07 11:27:40,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 59 transitions, 436 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 11:27:40,198 INFO L231 Difference]: Finished difference. Result has 46 places, 34 transitions, 237 flow [2024-11-07 11:27:40,199 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=46, PETRI_TRANSITIONS=34} [2024-11-07 11:27:40,199 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 22 predicate places. [2024-11-07 11:27:40,199 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 34 transitions, 237 flow [2024-11-07 11:27:40,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 11:27:40,199 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:27:40,200 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:27:40,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-07 11:27:40,200 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 11:27:40,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:27:40,200 INFO L85 PathProgramCache]: Analyzing trace with hash -41786863, now seen corresponding path program 4 times [2024-11-07 11:27:40,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:27:40,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224901004] [2024-11-07 11:27:40,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:27:40,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:27:40,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:40,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:40,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:27:40,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224901004] [2024-11-07 11:27:40,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224901004] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 11:27:40,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244628606] [2024-11-07 11:27:40,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-07 11:27:40,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:27:40,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 11:27:40,319 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 11:27:40,321 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 11:27:40,371 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-07 11:27:40,371 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 11:27:40,373 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-07 11:27:40,375 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 11:27:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:40,468 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 11:27:40,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:40,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244628606] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 11:27:40,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 11:27:40,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-07 11:27:40,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485369966] [2024-11-07 11:27:40,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 11:27:40,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-07 11:27:40,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:27:40,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-07 11:27:40,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-11-07 11:27:40,526 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-07 11:27:40,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 34 transitions, 237 flow. Second operand has 11 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 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 11:27:40,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:27:40,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-07 11:27:40,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:27:40,864 INFO L124 PetriNetUnfolderBase]: 345/604 cut-off events. [2024-11-07 11:27:40,864 INFO L125 PetriNetUnfolderBase]: For 1399/1399 co-relation queries the response was YES. [2024-11-07 11:27:40,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2228 conditions, 604 events. 345/604 cut-off events. For 1399/1399 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2532 event pairs, 24 based on Foata normal form. 13/617 useless extension candidates. Maximal degree in co-relation 1917. Up to 147 conditions per place. [2024-11-07 11:27:40,871 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 70 selfloop transitions, 39 changer transitions 1/111 dead transitions. [2024-11-07 11:27:40,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 111 transitions, 845 flow [2024-11-07 11:27:40,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-07 11:27:40,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-07 11:27:40,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 145 transitions. [2024-11-07 11:27:40,873 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-11-07 11:27:40,873 INFO L175 Difference]: Start difference. First operand has 46 places, 34 transitions, 237 flow. Second operand 15 states and 145 transitions. [2024-11-07 11:27:40,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 111 transitions, 845 flow [2024-11-07 11:27:40,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 111 transitions, 811 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-11-07 11:27:40,883 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 555 flow [2024-11-07 11:27:40,883 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=555, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-11-07 11:27:40,884 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 41 predicate places. [2024-11-07 11:27:40,884 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 555 flow [2024-11-07 11:27:40,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 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 11:27:40,884 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:27:40,884 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:27:40,903 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 11:27:41,085 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 11:27:41,085 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 11:27:41,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:27:41,085 INFO L85 PathProgramCache]: Analyzing trace with hash 76889327, now seen corresponding path program 5 times [2024-11-07 11:27:41,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:27:41,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505482156] [2024-11-07 11:27:41,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:27:41,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:27:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:41,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:41,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:27:41,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505482156] [2024-11-07 11:27:41,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505482156] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 11:27:41,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701214535] [2024-11-07 11:27:41,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-07 11:27:41,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:27:41,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 11:27:41,191 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 11:27:41,193 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 11:27:41,240 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 11:27:41,241 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 11:27:41,242 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-07 11:27:41,242 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 11:27:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:41,288 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 11:27:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:41,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701214535] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 11:27:41,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 11:27:41,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-07 11:27:41,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361683744] [2024-11-07 11:27:41,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 11:27:41,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-07 11:27:41,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:27:41,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-07 11:27:41,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-07 11:27:41,327 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-07 11:27:41,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 555 flow. Second operand has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 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 11:27:41,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:27:41,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-07 11:27:41,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:27:41,567 INFO L124 PetriNetUnfolderBase]: 331/588 cut-off events. [2024-11-07 11:27:41,567 INFO L125 PetriNetUnfolderBase]: For 2847/2847 co-relation queries the response was YES. [2024-11-07 11:27:41,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2568 conditions, 588 events. 331/588 cut-off events. For 2847/2847 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2475 event pairs, 58 based on Foata normal form. 13/601 useless extension candidates. Maximal degree in co-relation 2248. Up to 205 conditions per place. [2024-11-07 11:27:41,573 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 62 selfloop transitions, 35 changer transitions 1/99 dead transitions. [2024-11-07 11:27:41,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 99 transitions, 1003 flow [2024-11-07 11:27:41,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-07 11:27:41,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-07 11:27:41,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 86 transitions. [2024-11-07 11:27:41,577 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2024-11-07 11:27:41,577 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 555 flow. Second operand 8 states and 86 transitions. [2024-11-07 11:27:41,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 99 transitions, 1003 flow [2024-11-07 11:27:41,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 99 transitions, 871 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-11-07 11:27:41,591 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 676 flow [2024-11-07 11:27:41,591 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=676, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2024-11-07 11:27:41,592 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 49 predicate places. [2024-11-07 11:27:41,593 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 676 flow [2024-11-07 11:27:41,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 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 11:27:41,593 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:27:41,594 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:27:41,611 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 11:27:41,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:27:41,798 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 11:27:41,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:27:41,798 INFO L85 PathProgramCache]: Analyzing trace with hash -548220071, now seen corresponding path program 6 times [2024-11-07 11:27:41,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:27:41,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122896899] [2024-11-07 11:27:41,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:27:41,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:27:41,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:41,869 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 11:27:41,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:27:41,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122896899] [2024-11-07 11:27:41,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122896899] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 11:27:41,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 11:27:41,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-07 11:27:41,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256720708] [2024-11-07 11:27:41,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 11:27:41,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 11:27:41,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:27:41,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 11:27:41,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 11:27:41,873 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-07 11:27:41,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 676 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 11:27:41,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:27:41,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-07 11:27:41,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:27:42,003 INFO L124 PetriNetUnfolderBase]: 322/561 cut-off events. [2024-11-07 11:27:42,004 INFO L125 PetriNetUnfolderBase]: For 2900/2900 co-relation queries the response was YES. [2024-11-07 11:27:42,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2478 conditions, 561 events. 322/561 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2207 event pairs, 108 based on Foata normal form. 2/559 useless extension candidates. Maximal degree in co-relation 2283. Up to 322 conditions per place. [2024-11-07 11:27:42,010 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 56 selfloop transitions, 21 changer transitions 2/80 dead transitions. [2024-11-07 11:27:42,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 80 transitions, 871 flow [2024-11-07 11:27:42,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 11:27:42,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 11:27:42,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 53 transitions. [2024-11-07 11:27:42,011 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-11-07 11:27:42,011 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 676 flow. Second operand 5 states and 53 transitions. [2024-11-07 11:27:42,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 80 transitions, 871 flow [2024-11-07 11:27:42,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 80 transitions, 803 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-11-07 11:27:42,023 INFO L231 Difference]: Finished difference. Result has 73 places, 68 transitions, 644 flow [2024-11-07 11:27:42,023 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=644, PETRI_PLACES=73, PETRI_TRANSITIONS=68} [2024-11-07 11:27:42,025 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 49 predicate places. [2024-11-07 11:27:42,026 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 68 transitions, 644 flow [2024-11-07 11:27:42,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 11:27:42,026 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:27:42,026 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 11:27:42,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-07 11:27:42,026 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 11:27:42,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:27:42,026 INFO L85 PathProgramCache]: Analyzing trace with hash 2142389920, now seen corresponding path program 1 times [2024-11-07 11:27:42,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:27:42,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216252852] [2024-11-07 11:27:42,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:27:42,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:27:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:42,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 11:27:42,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:27:42,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216252852] [2024-11-07 11:27:42,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216252852] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 11:27:42,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512090525] [2024-11-07 11:27:42,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:27:42,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:27:42,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 11:27:42,115 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 11:27:42,119 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 11:27:42,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:42,174 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-07 11:27:42,176 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 11:27:42,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:42,231 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-07 11:27:42,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512090525] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 11:27:42,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-07 11:27:42,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 5 [2024-11-07 11:27:42,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801282109] [2024-11-07 11:27:42,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 11:27:42,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-07 11:27:42,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:27:42,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-07 11:27:42,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-07 11:27:42,232 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-11-07 11:27:42,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 68 transitions, 644 flow. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 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 11:27:42,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:27:42,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-11-07 11:27:42,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:27:42,407 INFO L124 PetriNetUnfolderBase]: 498/916 cut-off events. [2024-11-07 11:27:42,407 INFO L125 PetriNetUnfolderBase]: For 4340/4344 co-relation queries the response was YES. [2024-11-07 11:27:42,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3802 conditions, 916 events. 498/916 cut-off events. For 4340/4344 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4350 event pairs, 81 based on Foata normal form. 10/925 useless extension candidates. Maximal degree in co-relation 2873. Up to 411 conditions per place. [2024-11-07 11:27:42,415 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 103 selfloop transitions, 5 changer transitions 18/133 dead transitions. [2024-11-07 11:27:42,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 133 transitions, 1481 flow [2024-11-07 11:27:42,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 11:27:42,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 11:27:42,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2024-11-07 11:27:42,417 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2024-11-07 11:27:42,418 INFO L175 Difference]: Start difference. First operand has 73 places, 68 transitions, 644 flow. Second operand 4 states and 60 transitions. [2024-11-07 11:27:42,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 133 transitions, 1481 flow [2024-11-07 11:27:42,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 133 transitions, 1391 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-07 11:27:42,429 INFO L231 Difference]: Finished difference. Result has 72 places, 68 transitions, 610 flow [2024-11-07 11:27:42,429 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=610, PETRI_PLACES=72, PETRI_TRANSITIONS=68} [2024-11-07 11:27:42,430 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 48 predicate places. [2024-11-07 11:27:42,430 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 68 transitions, 610 flow [2024-11-07 11:27:42,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 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 11:27:42,430 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:27:42,430 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:27:42,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-07 11:27:42,631 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 11:27:42,631 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 11:27:42,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:27:42,632 INFO L85 PathProgramCache]: Analyzing trace with hash -52621990, now seen corresponding path program 2 times [2024-11-07 11:27:42,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:27:42,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885446683] [2024-11-07 11:27:42,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:27:42,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:27:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:42,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:27:42,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885446683] [2024-11-07 11:27:42,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885446683] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 11:27:42,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103141292] [2024-11-07 11:27:42,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 11:27:42,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:27:42,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 11:27:42,717 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 11:27:42,719 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 11:27:42,771 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 11:27:42,771 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 11:27:42,772 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-07 11:27:42,773 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 11:27:42,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:42,862 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 11:27:42,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:42,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103141292] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 11:27:42,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 11:27:42,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-11-07 11:27:42,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120033451] [2024-11-07 11:27:42,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 11:27:42,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-07 11:27:42,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:27:42,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-07 11:27:42,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2024-11-07 11:27:42,931 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-07 11:27:42,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 68 transitions, 610 flow. Second operand has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 13 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:27:42,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:27:42,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-07 11:27:42,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:27:43,635 INFO L124 PetriNetUnfolderBase]: 1095/1815 cut-off events. [2024-11-07 11:27:43,636 INFO L125 PetriNetUnfolderBase]: For 6935/6935 co-relation queries the response was YES. [2024-11-07 11:27:43,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7891 conditions, 1815 events. 1095/1815 cut-off events. For 6935/6935 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8364 event pairs, 48 based on Foata normal form. 56/1853 useless extension candidates. Maximal degree in co-relation 6134. Up to 363 conditions per place. [2024-11-07 11:27:43,676 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 131 selfloop transitions, 96 changer transitions 7/235 dead transitions. [2024-11-07 11:27:43,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 235 transitions, 2183 flow [2024-11-07 11:27:43,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-07 11:27:43,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-07 11:27:43,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 251 transitions. [2024-11-07 11:27:43,679 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4388111888111888 [2024-11-07 11:27:43,680 INFO L175 Difference]: Start difference. First operand has 72 places, 68 transitions, 610 flow. Second operand 26 states and 251 transitions. [2024-11-07 11:27:43,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 235 transitions, 2183 flow [2024-11-07 11:27:43,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 235 transitions, 2183 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-07 11:27:43,698 INFO L231 Difference]: Finished difference. Result has 113 places, 122 transitions, 1444 flow [2024-11-07 11:27:43,698 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1444, PETRI_PLACES=113, PETRI_TRANSITIONS=122} [2024-11-07 11:27:43,699 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 89 predicate places. [2024-11-07 11:27:43,699 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 122 transitions, 1444 flow [2024-11-07 11:27:43,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 13 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:27:43,699 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:27:43,700 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:27:43,718 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 11:27:43,903 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,SelfDestructingSolverStorable8 [2024-11-07 11:27:43,904 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 11:27:43,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:27:43,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1690812916, now seen corresponding path program 3 times [2024-11-07 11:27:43,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:27:43,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236888619] [2024-11-07 11:27:43,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:27:43,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:27:43,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:43,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:43,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:27:43,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236888619] [2024-11-07 11:27:43,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236888619] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 11:27:43,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906841179] [2024-11-07 11:27:43,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-07 11:27:43,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:27:43,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 11:27:43,979 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 11:27:43,980 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 11:27:44,034 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-07 11:27:44,034 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 11:27:44,035 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-07 11:27:44,036 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 11:27:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:44,098 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 11:27:44,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:44,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906841179] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 11:27:44,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 11:27:44,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-07 11:27:44,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535856396] [2024-11-07 11:27:44,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 11:27:44,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-07 11:27:44,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:27:44,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-07 11:27:44,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-11-07 11:27:44,156 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-07 11:27:44,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 122 transitions, 1444 flow. Second operand has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 states have internal predecessors, (82), 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 11:27:44,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:27:44,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-07 11:27:44,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:27:44,704 INFO L124 PetriNetUnfolderBase]: 1469/2422 cut-off events. [2024-11-07 11:27:44,704 INFO L125 PetriNetUnfolderBase]: For 27056/27056 co-relation queries the response was YES. [2024-11-07 11:27:44,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14775 conditions, 2422 events. 1469/2422 cut-off events. For 27056/27056 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11821 event pairs, 130 based on Foata normal form. 18/2440 useless extension candidates. Maximal degree in co-relation 11881. Up to 526 conditions per place. [2024-11-07 11:27:44,725 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 146 selfloop transitions, 87 changer transitions 3/237 dead transitions. [2024-11-07 11:27:44,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 237 transitions, 3071 flow [2024-11-07 11:27:44,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-07 11:27:44,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-07 11:27:44,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 168 transitions. [2024-11-07 11:27:44,728 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44919786096256686 [2024-11-07 11:27:44,728 INFO L175 Difference]: Start difference. First operand has 113 places, 122 transitions, 1444 flow. Second operand 17 states and 168 transitions. [2024-11-07 11:27:44,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 237 transitions, 3071 flow [2024-11-07 11:27:44,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 237 transitions, 2941 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-11-07 11:27:44,794 INFO L231 Difference]: Finished difference. Result has 128 places, 157 transitions, 2057 flow [2024-11-07 11:27:44,796 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1316, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2057, PETRI_PLACES=128, PETRI_TRANSITIONS=157} [2024-11-07 11:27:44,796 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 104 predicate places. [2024-11-07 11:27:44,797 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 157 transitions, 2057 flow [2024-11-07 11:27:44,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 states have internal predecessors, (82), 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 11:27:44,797 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:27:44,798 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:27:44,814 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 11:27:45,001 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,SelfDestructingSolverStorable9 [2024-11-07 11:27:45,002 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 11:27:45,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:27:45,002 INFO L85 PathProgramCache]: Analyzing trace with hash -270032684, now seen corresponding path program 4 times [2024-11-07 11:27:45,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:27:45,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643537419] [2024-11-07 11:27:45,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:27:45,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:27:45,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:45,067 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 11:27:45,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:27:45,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643537419] [2024-11-07 11:27:45,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643537419] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 11:27:45,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226906632] [2024-11-07 11:27:45,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-07 11:27:45,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:27:45,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 11:27:45,070 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 11:27:45,072 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 11:27:45,114 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-07 11:27:45,115 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 11:27:45,115 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-07 11:27:45,116 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 11:27:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:45,177 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 11:27:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:45,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226906632] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 11:27:45,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 11:27:45,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-07 11:27:45,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685463486] [2024-11-07 11:27:45,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 11:27:45,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-07 11:27:45,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:27:45,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-07 11:27:45,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-07 11:27:45,248 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-07 11:27:45,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 157 transitions, 2057 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 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 11:27:45,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:27:45,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-07 11:27:45,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:27:45,900 INFO L124 PetriNetUnfolderBase]: 1766/2917 cut-off events. [2024-11-07 11:27:45,901 INFO L125 PetriNetUnfolderBase]: For 45095/45095 co-relation queries the response was YES. [2024-11-07 11:27:45,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19052 conditions, 2917 events. 1766/2917 cut-off events. For 45095/45095 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14860 event pairs, 102 based on Foata normal form. 30/2947 useless extension candidates. Maximal degree in co-relation 16096. Up to 843 conditions per place. [2024-11-07 11:27:45,932 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 133 selfloop transitions, 137 changer transitions 24/295 dead transitions. [2024-11-07 11:27:45,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 295 transitions, 4135 flow [2024-11-07 11:27:45,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-07 11:27:45,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-07 11:27:45,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 144 transitions. [2024-11-07 11:27:45,934 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-11-07 11:27:45,934 INFO L175 Difference]: Start difference. First operand has 128 places, 157 transitions, 2057 flow. Second operand 15 states and 144 transitions. [2024-11-07 11:27:45,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 295 transitions, 4135 flow [2024-11-07 11:27:46,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 295 transitions, 3651 flow, removed 229 selfloop flow, removed 3 redundant places. [2024-11-07 11:27:46,073 INFO L231 Difference]: Finished difference. Result has 146 places, 206 transitions, 2879 flow [2024-11-07 11:27:46,073 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1752, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2879, PETRI_PLACES=146, PETRI_TRANSITIONS=206} [2024-11-07 11:27:46,074 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 122 predicate places. [2024-11-07 11:27:46,074 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 206 transitions, 2879 flow [2024-11-07 11:27:46,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 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 11:27:46,074 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:27:46,074 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:27:46,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-07 11:27:46,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-07 11:27:46,275 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 11:27:46,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:27:46,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1119307828, now seen corresponding path program 5 times [2024-11-07 11:27:46,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:27:46,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125019331] [2024-11-07 11:27:46,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:27:46,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:27:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:46,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:46,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:27:46,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125019331] [2024-11-07 11:27:46,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125019331] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 11:27:46,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364268634] [2024-11-07 11:27:46,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-07 11:27:46,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:27:46,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 11:27:46,375 INFO L229 MonitoredProcess]: Starting monitored process 8 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 11:27:46,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-07 11:27:46,422 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-07 11:27:46,422 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 11:27:46,423 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-07 11:27:46,424 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 11:27:46,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:46,490 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 11:27:46,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:46,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364268634] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 11:27:46,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 11:27:46,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-11-07 11:27:46,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131281544] [2024-11-07 11:27:46,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 11:27:46,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-07 11:27:46,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:27:46,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-07 11:27:46,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-07 11:27:46,545 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-07 11:27:46,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 206 transitions, 2879 flow. Second operand has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 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 11:27:46,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:27:46,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-07 11:27:46,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:27:47,483 INFO L124 PetriNetUnfolderBase]: 2023/3316 cut-off events. [2024-11-07 11:27:47,484 INFO L125 PetriNetUnfolderBase]: For 58633/58633 co-relation queries the response was YES. [2024-11-07 11:27:47,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22098 conditions, 3316 events. 2023/3316 cut-off events. For 58633/58633 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 17136 event pairs, 70 based on Foata normal form. 52/3368 useless extension candidates. Maximal degree in co-relation 21012. Up to 676 conditions per place. [2024-11-07 11:27:47,520 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 171 selfloop transitions, 186 changer transitions 2/360 dead transitions. [2024-11-07 11:27:47,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 360 transitions, 5212 flow [2024-11-07 11:27:47,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-07 11:27:47,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-07 11:27:47,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 251 transitions. [2024-11-07 11:27:47,523 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4388111888111888 [2024-11-07 11:27:47,523 INFO L175 Difference]: Start difference. First operand has 146 places, 206 transitions, 2879 flow. Second operand 26 states and 251 transitions. [2024-11-07 11:27:47,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 360 transitions, 5212 flow [2024-11-07 11:27:47,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 360 transitions, 5017 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-11-07 11:27:47,694 INFO L231 Difference]: Finished difference. Result has 181 places, 245 transitions, 4054 flow [2024-11-07 11:27:47,694 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2702, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4054, PETRI_PLACES=181, PETRI_TRANSITIONS=245} [2024-11-07 11:27:47,695 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 157 predicate places. [2024-11-07 11:27:47,695 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 245 transitions, 4054 flow [2024-11-07 11:27:47,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 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 11:27:47,695 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:27:47,695 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:27:47,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-07 11:27:47,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:27:47,896 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-07 11:27:47,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:27:47,897 INFO L85 PathProgramCache]: Analyzing trace with hash 430169670, now seen corresponding path program 6 times [2024-11-07 11:27:47,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:27:47,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671923082] [2024-11-07 11:27:47,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:27:47,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:27:47,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:47,961 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 11:27:47,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:27:47,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671923082] [2024-11-07 11:27:47,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671923082] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 11:27:47,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714886378] [2024-11-07 11:27:47,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-07 11:27:47,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:27:47,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 11:27:47,964 INFO L229 MonitoredProcess]: Starting monitored process 9 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 11:27:47,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-07 11:27:48,018 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-07 11:27:48,018 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 11:27:48,019 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-07 11:27:48,020 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 11:27:48,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:48,121 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 11:27:48,175 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 11:27:48,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714886378] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 11:27:48,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 11:27:48,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-07 11:27:48,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255094527] [2024-11-07 11:27:48,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 11:27:48,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-07 11:27:48,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:27:48,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-07 11:27:48,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-11-07 11:27:48,190 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-07 11:27:48,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 245 transitions, 4054 flow. Second operand has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 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 11:27:48,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:27:48,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-07 11:27:48,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:27:49,160 INFO L124 PetriNetUnfolderBase]: 2553/4224 cut-off events. [2024-11-07 11:27:49,160 INFO L125 PetriNetUnfolderBase]: For 114827/114827 co-relation queries the response was YES. [2024-11-07 11:27:49,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32163 conditions, 4224 events. 2553/4224 cut-off events. For 114827/114827 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 23432 event pairs, 108 based on Foata normal form. 40/4264 useless extension candidates. Maximal degree in co-relation 30457. Up to 1349 conditions per place. [2024-11-07 11:27:49,206 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 188 selfloop transitions, 215 changer transitions 2/406 dead transitions. [2024-11-07 11:27:49,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 406 transitions, 7113 flow [2024-11-07 11:27:49,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-07 11:27:49,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-07 11:27:49,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 157 transitions. [2024-11-07 11:27:49,207 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-11-07 11:27:49,208 INFO L175 Difference]: Start difference. First operand has 181 places, 245 transitions, 4054 flow. Second operand 16 states and 157 transitions. [2024-11-07 11:27:49,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 406 transitions, 7113 flow [2024-11-07 11:27:49,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 406 transitions, 6643 flow, removed 151 selfloop flow, removed 11 redundant places. [2024-11-07 11:27:49,664 INFO L231 Difference]: Finished difference. Result has 192 places, 311 transitions, 5722 flow [2024-11-07 11:27:49,664 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3695, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5722, PETRI_PLACES=192, PETRI_TRANSITIONS=311} [2024-11-07 11:27:49,665 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 168 predicate places. [2024-11-07 11:27:49,665 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 311 transitions, 5722 flow [2024-11-07 11:27:49,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 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 11:27:49,665 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:27:49,665 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:27:49,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-07 11:27:49,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:27:49,866 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-07 11:27:49,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:27:49,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1258067090, now seen corresponding path program 7 times [2024-11-07 11:27:49,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:27:49,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573837196] [2024-11-07 11:27:49,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:27:49,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:27:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:49,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:27:49,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573837196] [2024-11-07 11:27:49,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573837196] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 11:27:49,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831106769] [2024-11-07 11:27:49,957 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-07 11:27:49,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:27:49,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 11:27:49,960 INFO L229 MonitoredProcess]: Starting monitored process 10 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 11:27:49,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-07 11:27:50,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:50,012 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-07 11:27:50,013 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 11:27:50,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:50,078 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 11:27:50,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:50,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831106769] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 11:27:50,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 11:27:50,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-11-07 11:27:50,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064870716] [2024-11-07 11:27:50,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 11:27:50,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-07 11:27:50,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:27:50,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-07 11:27:50,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-07 11:27:50,123 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-07 11:27:50,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 311 transitions, 5722 flow. Second operand has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 states have internal predecessors, (71), 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 11:27:50,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:27:50,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-07 11:27:50,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:27:51,091 INFO L124 PetriNetUnfolderBase]: 2559/4246 cut-off events. [2024-11-07 11:27:51,091 INFO L125 PetriNetUnfolderBase]: For 127695/127695 co-relation queries the response was YES. [2024-11-07 11:27:51,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34110 conditions, 4246 events. 2559/4246 cut-off events. For 127695/127695 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 23873 event pairs, 307 based on Foata normal form. 8/4254 useless extension candidates. Maximal degree in co-relation 32260. Up to 1034 conditions per place. [2024-11-07 11:27:51,131 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 225 selfloop transitions, 160 changer transitions 4/390 dead transitions. [2024-11-07 11:27:51,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 390 transitions, 7495 flow [2024-11-07 11:27:51,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-07 11:27:51,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-07 11:27:51,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 141 transitions. [2024-11-07 11:27:51,132 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.493006993006993 [2024-11-07 11:27:51,132 INFO L175 Difference]: Start difference. First operand has 192 places, 311 transitions, 5722 flow. Second operand 13 states and 141 transitions. [2024-11-07 11:27:51,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 390 transitions, 7495 flow [2024-11-07 11:27:51,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 390 transitions, 7415 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-11-07 11:27:51,548 INFO L231 Difference]: Finished difference. Result has 200 places, 309 transitions, 5983 flow [2024-11-07 11:27:51,548 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=5634, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5983, PETRI_PLACES=200, PETRI_TRANSITIONS=309} [2024-11-07 11:27:51,549 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 176 predicate places. [2024-11-07 11:27:51,549 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 309 transitions, 5983 flow [2024-11-07 11:27:51,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 states have internal predecessors, (71), 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 11:27:51,549 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:27:51,549 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:27:51,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-07 11:27:51,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:27:51,750 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-07 11:27:51,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:27:51,750 INFO L85 PathProgramCache]: Analyzing trace with hash -128314632, now seen corresponding path program 8 times [2024-11-07 11:27:51,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:27:51,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589079212] [2024-11-07 11:27:51,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:27:51,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:27:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:51,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:27:51,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589079212] [2024-11-07 11:27:51,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589079212] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 11:27:51,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662345373] [2024-11-07 11:27:51,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 11:27:51,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:27:51,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 11:27:51,822 INFO L229 MonitoredProcess]: Starting monitored process 11 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 11:27:51,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-07 11:27:51,873 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 11:27:51,873 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 11:27:51,874 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-07 11:27:51,875 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 11:27:51,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:51,947 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 11:27:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:51,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662345373] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 11:27:51,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 11:27:51,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-11-07 11:27:51,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047355625] [2024-11-07 11:27:51,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 11:27:51,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-07 11:27:51,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:27:51,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-07 11:27:51,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-11-07 11:27:51,998 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-07 11:27:51,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 309 transitions, 5983 flow. Second operand has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 13 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:27:51,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:27:51,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-07 11:27:51,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:27:52,977 INFO L124 PetriNetUnfolderBase]: 2784/4601 cut-off events. [2024-11-07 11:27:52,977 INFO L125 PetriNetUnfolderBase]: For 152594/152594 co-relation queries the response was YES. [2024-11-07 11:27:52,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38434 conditions, 4601 events. 2784/4601 cut-off events. For 152594/152594 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 25811 event pairs, 183 based on Foata normal form. 54/4655 useless extension candidates. Maximal degree in co-relation 36498. Up to 917 conditions per place. [2024-11-07 11:27:53,013 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 166 selfloop transitions, 297 changer transitions 6/470 dead transitions. [2024-11-07 11:27:53,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 470 transitions, 9242 flow [2024-11-07 11:27:53,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-07 11:27:53,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-07 11:27:53,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 234 transitions. [2024-11-07 11:27:53,015 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4254545454545455 [2024-11-07 11:27:53,015 INFO L175 Difference]: Start difference. First operand has 200 places, 309 transitions, 5983 flow. Second operand 25 states and 234 transitions. [2024-11-07 11:27:53,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 470 transitions, 9242 flow [2024-11-07 11:27:53,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 470 transitions, 8886 flow, removed 22 selfloop flow, removed 11 redundant places. [2024-11-07 11:27:53,465 INFO L231 Difference]: Finished difference. Result has 218 places, 366 transitions, 8002 flow [2024-11-07 11:27:53,465 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=5637, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=8002, PETRI_PLACES=218, PETRI_TRANSITIONS=366} [2024-11-07 11:27:53,466 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 194 predicate places. [2024-11-07 11:27:53,466 INFO L471 AbstractCegarLoop]: Abstraction has has 218 places, 366 transitions, 8002 flow [2024-11-07 11:27:53,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 13 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:27:53,466 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:27:53,466 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:27:53,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-07 11:27:53,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-07 11:27:53,671 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-07 11:27:53,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:27:53,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1851687192, now seen corresponding path program 9 times [2024-11-07 11:27:53,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:27:53,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854187796] [2024-11-07 11:27:53,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:27:53,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:27:53,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:53,759 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 11:27:53,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:27:53,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854187796] [2024-11-07 11:27:53,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854187796] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 11:27:53,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968924585] [2024-11-07 11:27:53,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-07 11:27:53,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:27:53,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 11:27:53,762 INFO L229 MonitoredProcess]: Starting monitored process 12 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 11:27:53,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-07 11:27:53,810 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-07 11:27:53,810 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 11:27:53,811 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-07 11:27:53,815 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 11:27:53,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:53,888 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 11:27:53,935 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 11:27:53,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968924585] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 11:27:53,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 11:27:53,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-07 11:27:53,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118232393] [2024-11-07 11:27:53,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 11:27:53,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-07 11:27:53,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:27:53,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-07 11:27:53,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-11-07 11:27:53,943 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-07 11:27:53,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 366 transitions, 8002 flow. Second operand has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 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 11:27:53,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:27:53,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-07 11:27:53,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:27:55,144 INFO L124 PetriNetUnfolderBase]: 3137/5230 cut-off events. [2024-11-07 11:27:55,144 INFO L125 PetriNetUnfolderBase]: For 197403/197403 co-relation queries the response was YES. [2024-11-07 11:27:55,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46330 conditions, 5230 events. 3137/5230 cut-off events. For 197403/197403 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 30606 event pairs, 147 based on Foata normal form. 30/5260 useless extension candidates. Maximal degree in co-relation 43619. Up to 1015 conditions per place. [2024-11-07 11:27:55,185 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 234 selfloop transitions, 319 changer transitions 6/560 dead transitions. [2024-11-07 11:27:55,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 560 transitions, 12026 flow [2024-11-07 11:27:55,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-07 11:27:55,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-07 11:27:55,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 271 transitions. [2024-11-07 11:27:55,187 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42476489028213166 [2024-11-07 11:27:55,187 INFO L175 Difference]: Start difference. First operand has 218 places, 366 transitions, 8002 flow. Second operand 29 states and 271 transitions. [2024-11-07 11:27:55,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 560 transitions, 12026 flow [2024-11-07 11:27:56,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 560 transitions, 11519 flow, removed 129 selfloop flow, removed 14 redundant places. [2024-11-07 11:27:56,098 INFO L231 Difference]: Finished difference. Result has 237 places, 415 transitions, 9661 flow [2024-11-07 11:27:56,099 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=7552, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=9661, PETRI_PLACES=237, PETRI_TRANSITIONS=415} [2024-11-07 11:27:56,100 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 213 predicate places. [2024-11-07 11:27:56,100 INFO L471 AbstractCegarLoop]: Abstraction has has 237 places, 415 transitions, 9661 flow [2024-11-07 11:27:56,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 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 11:27:56,100 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:27:56,100 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:27:56,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-07 11:27:56,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-07 11:27:56,301 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-07 11:27:56,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:27:56,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1658996268, now seen corresponding path program 10 times [2024-11-07 11:27:56,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:27:56,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265952398] [2024-11-07 11:27:56,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:27:56,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:27:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:56,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:27:56,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265952398] [2024-11-07 11:27:56,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265952398] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 11:27:56,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088620889] [2024-11-07 11:27:56,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-07 11:27:56,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:27:56,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 11:27:56,383 INFO L229 MonitoredProcess]: Starting monitored process 13 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 11:27:56,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-07 11:27:56,424 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-07 11:27:56,425 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 11:27:56,426 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-07 11:27:56,427 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 11:27:56,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:56,498 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 11:27:56,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:56,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088620889] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 11:27:56,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 11:27:56,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-07 11:27:56,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377581251] [2024-11-07 11:27:56,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 11:27:56,552 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-07 11:27:56,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:27:56,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-07 11:27:56,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2024-11-07 11:27:56,566 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-07 11:27:56,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 415 transitions, 9661 flow. Second operand has 15 states, 15 states have (on average 5.6) internal successors, (84), 15 states have internal predecessors, (84), 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 11:27:56,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:27:56,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-07 11:27:56,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:27:57,736 INFO L124 PetriNetUnfolderBase]: 3539/5879 cut-off events. [2024-11-07 11:27:57,736 INFO L125 PetriNetUnfolderBase]: For 260451/260451 co-relation queries the response was YES. [2024-11-07 11:27:57,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53711 conditions, 5879 events. 3539/5879 cut-off events. For 260451/260451 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 35120 event pairs, 1262 based on Foata normal form. 18/5897 useless extension candidates. Maximal degree in co-relation 51460. Up to 4496 conditions per place. [2024-11-07 11:27:57,802 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 454 selfloop transitions, 70 changer transitions 2/527 dead transitions. [2024-11-07 11:27:57,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 527 transitions, 12373 flow [2024-11-07 11:27:57,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-07 11:27:57,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-07 11:27:57,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 156 transitions. [2024-11-07 11:27:57,804 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-11-07 11:27:57,804 INFO L175 Difference]: Start difference. First operand has 237 places, 415 transitions, 9661 flow. Second operand 16 states and 156 transitions. [2024-11-07 11:27:57,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 527 transitions, 12373 flow [2024-11-07 11:27:59,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 527 transitions, 11852 flow, removed 55 selfloop flow, removed 15 redundant places. [2024-11-07 11:27:59,011 INFO L231 Difference]: Finished difference. Result has 243 places, 448 transitions, 10108 flow [2024-11-07 11:27:59,011 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9198, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10108, PETRI_PLACES=243, PETRI_TRANSITIONS=448} [2024-11-07 11:27:59,012 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 219 predicate places. [2024-11-07 11:27:59,012 INFO L471 AbstractCegarLoop]: Abstraction has has 243 places, 448 transitions, 10108 flow [2024-11-07 11:27:59,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 15 states have internal predecessors, (84), 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 11:27:59,012 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:27:59,012 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:27:59,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-07 11:27:59,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-07 11:27:59,215 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-07 11:27:59,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:27:59,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1207569816, now seen corresponding path program 11 times [2024-11-07 11:27:59,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:27:59,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134930637] [2024-11-07 11:27:59,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:27:59,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:27:59,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:27:59,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:59,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:27:59,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134930637] [2024-11-07 11:27:59,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134930637] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 11:27:59,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640718602] [2024-11-07 11:27:59,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-07 11:27:59,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:27:59,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 11:27:59,282 INFO L229 MonitoredProcess]: Starting monitored process 14 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 11:27:59,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-07 11:27:59,334 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-07 11:27:59,334 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 11:27:59,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-07 11:27:59,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 11:27:59,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:59,398 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 11:27:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:27:59,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640718602] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 11:27:59,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 11:27:59,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-07 11:27:59,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045394946] [2024-11-07 11:27:59,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 11:27:59,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-07 11:27:59,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:27:59,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-07 11:27:59,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-11-07 11:27:59,450 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-07 11:27:59,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 448 transitions, 10108 flow. Second operand has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 15 states have internal predecessors, (88), 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 11:27:59,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:27:59,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-07 11:27:59,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:28:00,775 INFO L124 PetriNetUnfolderBase]: 3886/6431 cut-off events. [2024-11-07 11:28:00,776 INFO L125 PetriNetUnfolderBase]: For 317299/317299 co-relation queries the response was YES. [2024-11-07 11:28:00,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59694 conditions, 6431 events. 3886/6431 cut-off events. For 317299/317299 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 38669 event pairs, 610 based on Foata normal form. 84/6515 useless extension candidates. Maximal degree in co-relation 57470. Up to 2729 conditions per place. [2024-11-07 11:28:00,840 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 347 selfloop transitions, 242 changer transitions 3/593 dead transitions. [2024-11-07 11:28:00,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 593 transitions, 13602 flow [2024-11-07 11:28:00,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-07 11:28:00,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-07 11:28:00,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 201 transitions. [2024-11-07 11:28:00,842 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45681818181818185 [2024-11-07 11:28:00,842 INFO L175 Difference]: Start difference. First operand has 243 places, 448 transitions, 10108 flow. Second operand 20 states and 201 transitions. [2024-11-07 11:28:00,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 593 transitions, 13602 flow [2024-11-07 11:28:02,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 593 transitions, 13283 flow, removed 129 selfloop flow, removed 6 redundant places. [2024-11-07 11:28:02,452 INFO L231 Difference]: Finished difference. Result has 267 places, 480 transitions, 11720 flow [2024-11-07 11:28:02,452 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9812, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=11720, PETRI_PLACES=267, PETRI_TRANSITIONS=480} [2024-11-07 11:28:02,452 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 243 predicate places. [2024-11-07 11:28:02,452 INFO L471 AbstractCegarLoop]: Abstraction has has 267 places, 480 transitions, 11720 flow [2024-11-07 11:28:02,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 15 states have internal predecessors, (88), 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 11:28:02,453 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:28:02,453 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:28:02,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-07 11:28:02,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-07 11:28:02,653 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-07 11:28:02,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:28:02,654 INFO L85 PathProgramCache]: Analyzing trace with hash 221984848, now seen corresponding path program 12 times [2024-11-07 11:28:02,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:28:02,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573245725] [2024-11-07 11:28:02,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:28:02,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:28:02,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:28:02,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:28:02,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:28:02,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573245725] [2024-11-07 11:28:02,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573245725] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 11:28:02,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223711659] [2024-11-07 11:28:02,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-07 11:28:02,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:28:02,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 11:28:02,729 INFO L229 MonitoredProcess]: Starting monitored process 15 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 11:28:02,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-07 11:28:02,776 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-07 11:28:02,776 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 11:28:02,776 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-07 11:28:02,777 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 11:28:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:28:02,840 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 11:28:02,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 11:28:02,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223711659] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 11:28:02,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 11:28:02,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-11-07 11:28:02,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158407159] [2024-11-07 11:28:02,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 11:28:02,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-07 11:28:02,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:28:02,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-07 11:28:02,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-11-07 11:28:02,873 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-07 11:28:02,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 480 transitions, 11720 flow. Second operand has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 13 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:28:02,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:28:02,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-07 11:28:02,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:28:04,633 INFO L124 PetriNetUnfolderBase]: 4068/6724 cut-off events. [2024-11-07 11:28:04,634 INFO L125 PetriNetUnfolderBase]: For 398466/398466 co-relation queries the response was YES. [2024-11-07 11:28:04,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66684 conditions, 6724 events. 4068/6724 cut-off events. For 398466/398466 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 40562 event pairs, 608 based on Foata normal form. 54/6778 useless extension candidates. Maximal degree in co-relation 66135. Up to 2546 conditions per place. [2024-11-07 11:28:04,713 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 320 selfloop transitions, 271 changer transitions 2/594 dead transitions. [2024-11-07 11:28:04,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 594 transitions, 14808 flow [2024-11-07 11:28:04,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-07 11:28:04,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-07 11:28:04,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 170 transitions. [2024-11-07 11:28:04,715 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-11-07 11:28:04,715 INFO L175 Difference]: Start difference. First operand has 267 places, 480 transitions, 11720 flow. Second operand 18 states and 170 transitions. [2024-11-07 11:28:04,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 594 transitions, 14808 flow [2024-11-07 11:28:06,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 594 transitions, 14433 flow, removed 174 selfloop flow, removed 3 redundant places. [2024-11-07 11:28:06,516 INFO L231 Difference]: Finished difference. Result has 288 places, 503 transitions, 13124 flow [2024-11-07 11:28:06,516 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11430, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=13124, PETRI_PLACES=288, PETRI_TRANSITIONS=503} [2024-11-07 11:28:06,516 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 264 predicate places. [2024-11-07 11:28:06,516 INFO L471 AbstractCegarLoop]: Abstraction has has 288 places, 503 transitions, 13124 flow [2024-11-07 11:28:06,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 13 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:28:06,517 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:28:06,517 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:28:06,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-07 11:28:06,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:28:06,717 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-07 11:28:06,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:28:06,718 INFO L85 PathProgramCache]: Analyzing trace with hash -866713966, now seen corresponding path program 13 times [2024-11-07 11:28:06,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:28:06,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809760894] [2024-11-07 11:28:06,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:28:06,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:28:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:28:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:28:06,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:28:06,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809760894] [2024-11-07 11:28:06,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809760894] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 11:28:06,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723543489] [2024-11-07 11:28:06,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-07 11:28:06,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:28:06,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 11:28:06,796 INFO L229 MonitoredProcess]: Starting monitored process 16 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 11:28:06,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-07 11:28:06,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:28:06,849 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-07 11:28:06,850 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 11:28:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:28:06,922 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 11:28:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 11:28:06,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723543489] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 11:28:06,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 11:28:06,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-11-07 11:28:06,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458476433] [2024-11-07 11:28:06,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 11:28:06,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-07 11:28:06,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:28:06,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-07 11:28:06,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2024-11-07 11:28:06,973 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-07 11:28:06,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 503 transitions, 13124 flow. Second operand has 13 states, 13 states have (on average 6.0) internal successors, (78), 13 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:28:06,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:28:06,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-07 11:28:06,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:28:08,504 INFO L124 PetriNetUnfolderBase]: 4065/6719 cut-off events. [2024-11-07 11:28:08,504 INFO L125 PetriNetUnfolderBase]: For 428080/428080 co-relation queries the response was YES. [2024-11-07 11:28:08,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69223 conditions, 6719 events. 4065/6719 cut-off events. For 428080/428080 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 40711 event pairs, 1511 based on Foata normal form. 8/6727 useless extension candidates. Maximal degree in co-relation 68556. Up to 5394 conditions per place. [2024-11-07 11:28:08,573 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 482 selfloop transitions, 70 changer transitions 2/555 dead transitions. [2024-11-07 11:28:08,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 555 transitions, 14906 flow [2024-11-07 11:28:08,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-07 11:28:08,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-07 11:28:08,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 115 transitions. [2024-11-07 11:28:08,574 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47520661157024796 [2024-11-07 11:28:08,574 INFO L175 Difference]: Start difference. First operand has 288 places, 503 transitions, 13124 flow. Second operand 11 states and 115 transitions. [2024-11-07 11:28:08,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 555 transitions, 14906 flow [2024-11-07 11:28:10,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 555 transitions, 14660 flow, removed 74 selfloop flow, removed 13 redundant places. [2024-11-07 11:28:10,412 INFO L231 Difference]: Finished difference. Result has 283 places, 500 transitions, 13009 flow [2024-11-07 11:28:10,412 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12846, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13009, PETRI_PLACES=283, PETRI_TRANSITIONS=500} [2024-11-07 11:28:10,412 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 259 predicate places. [2024-11-07 11:28:10,412 INFO L471 AbstractCegarLoop]: Abstraction has has 283 places, 500 transitions, 13009 flow [2024-11-07 11:28:10,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 13 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:28:10,412 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:28:10,413 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:28:10,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-07 11:28:10,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:28:10,613 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-07 11:28:10,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:28:10,613 INFO L85 PathProgramCache]: Analyzing trace with hash 857992749, now seen corresponding path program 14 times [2024-11-07 11:28:10,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:28:10,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863373660] [2024-11-07 11:28:10,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:28:10,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:28:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:28:10,696 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 11:28:10,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:28:10,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863373660] [2024-11-07 11:28:10,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863373660] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 11:28:10,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417825547] [2024-11-07 11:28:10,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 11:28:10,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:28:10,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 11:28:10,703 INFO L229 MonitoredProcess]: Starting monitored process 17 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 11:28:10,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-07 11:28:10,762 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 11:28:10,762 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 11:28:10,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-07 11:28:10,764 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 11:28:10,810 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:28:10,810 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 11:28:10,849 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:28:10,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417825547] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 11:28:10,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 11:28:10,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 7 [2024-11-07 11:28:10,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520697263] [2024-11-07 11:28:10,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 11:28:10,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-07 11:28:10,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:28:10,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-07 11:28:10,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-07 11:28:10,850 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-11-07 11:28:10,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 500 transitions, 13009 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 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 11:28:10,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:28:10,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-11-07 11:28:10,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:28:12,686 INFO L124 PetriNetUnfolderBase]: 6280/10721 cut-off events. [2024-11-07 11:28:12,687 INFO L125 PetriNetUnfolderBase]: For 636649/637128 co-relation queries the response was YES. [2024-11-07 11:28:12,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109222 conditions, 10721 events. 6280/10721 cut-off events. For 636649/637128 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 75305 event pairs, 539 based on Foata normal form. 191/10831 useless extension candidates. Maximal degree in co-relation 107503. Up to 3220 conditions per place. [2024-11-07 11:28:12,855 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 1077 selfloop transitions, 10 changer transitions 146/1285 dead transitions. [2024-11-07 11:28:12,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 1285 transitions, 36997 flow [2024-11-07 11:28:12,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 11:28:12,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 11:28:12,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2024-11-07 11:28:12,856 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7090909090909091 [2024-11-07 11:28:12,857 INFO L175 Difference]: Start difference. First operand has 283 places, 500 transitions, 13009 flow. Second operand 5 states and 78 transitions. [2024-11-07 11:28:12,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 1285 transitions, 36997 flow [2024-11-07 11:28:17,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 1285 transitions, 36745 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-11-07 11:28:17,687 INFO L231 Difference]: Finished difference. Result has 280 places, 496 transitions, 12728 flow [2024-11-07 11:28:17,687 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12902, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=12728, PETRI_PLACES=280, PETRI_TRANSITIONS=496} [2024-11-07 11:28:17,688 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 256 predicate places. [2024-11-07 11:28:17,688 INFO L471 AbstractCegarLoop]: Abstraction has has 280 places, 496 transitions, 12728 flow [2024-11-07 11:28:17,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 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 11:28:17,688 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:28:17,688 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:28:17,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-07 11:28:17,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:28:17,889 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-07 11:28:17,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:28:17,889 INFO L85 PathProgramCache]: Analyzing trace with hash -992368461, now seen corresponding path program 15 times [2024-11-07 11:28:17,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:28:17,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717724082] [2024-11-07 11:28:17,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:28:17,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:28:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:28:17,977 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:28:17,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:28:17,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717724082] [2024-11-07 11:28:17,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717724082] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 11:28:17,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035989012] [2024-11-07 11:28:17,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-07 11:28:17,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:28:17,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 11:28:17,980 INFO L229 MonitoredProcess]: Starting monitored process 18 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 11:28:17,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-07 11:28:18,032 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-07 11:28:18,032 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 11:28:18,033 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-07 11:28:18,034 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 11:28:18,137 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:28:18,137 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 11:28:18,224 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:28:18,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035989012] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 11:28:18,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 11:28:18,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-11-07 11:28:18,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474970483] [2024-11-07 11:28:18,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 11:28:18,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-07 11:28:18,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:28:18,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-07 11:28:18,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2024-11-07 11:28:18,230 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-07 11:28:18,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 496 transitions, 12728 flow. Second operand has 20 states, 20 states have (on average 6.2) internal successors, (124), 20 states have internal predecessors, (124), 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 11:28:18,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:28:18,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-07 11:28:18,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:28:22,314 INFO L124 PetriNetUnfolderBase]: 9846/16108 cut-off events. [2024-11-07 11:28:22,315 INFO L125 PetriNetUnfolderBase]: For 1104086/1104086 co-relation queries the response was YES. [2024-11-07 11:28:22,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174441 conditions, 16108 events. 9846/16108 cut-off events. For 1104086/1104086 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 109905 event pairs, 331 based on Foata normal form. 185/16293 useless extension candidates. Maximal degree in co-relation 172764. Up to 3161 conditions per place. [2024-11-07 11:28:22,596 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 455 selfloop transitions, 600 changer transitions 31/1087 dead transitions. [2024-11-07 11:28:22,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 1087 transitions, 27650 flow [2024-11-07 11:28:22,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-07 11:28:22,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-11-07 11:28:22,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 416 transitions. [2024-11-07 11:28:22,598 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4297520661157025 [2024-11-07 11:28:22,598 INFO L175 Difference]: Start difference. First operand has 280 places, 496 transitions, 12728 flow. Second operand 44 states and 416 transitions. [2024-11-07 11:28:22,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 1087 transitions, 27650 flow [2024-11-07 11:28:30,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 1087 transitions, 27482 flow, removed 84 selfloop flow, removed 0 redundant places. [2024-11-07 11:28:30,374 INFO L231 Difference]: Finished difference. Result has 343 places, 732 transitions, 21688 flow [2024-11-07 11:28:30,374 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12720, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=367, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=21688, PETRI_PLACES=343, PETRI_TRANSITIONS=732} [2024-11-07 11:28:30,375 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 319 predicate places. [2024-11-07 11:28:30,375 INFO L471 AbstractCegarLoop]: Abstraction has has 343 places, 732 transitions, 21688 flow [2024-11-07 11:28:30,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 20 states have internal predecessors, (124), 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 11:28:30,375 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:28:30,375 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:28:30,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-07 11:28:30,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:28:30,576 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-07 11:28:30,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:28:30,576 INFO L85 PathProgramCache]: Analyzing trace with hash -203036361, now seen corresponding path program 16 times [2024-11-07 11:28:30,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:28:30,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126432609] [2024-11-07 11:28:30,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:28:30,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:28:30,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:28:30,655 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:28:30,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:28:30,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126432609] [2024-11-07 11:28:30,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126432609] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 11:28:30,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525748091] [2024-11-07 11:28:30,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-07 11:28:30,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:28:30,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 11:28:30,659 INFO L229 MonitoredProcess]: Starting monitored process 19 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 11:28:30,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-07 11:28:30,710 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-07 11:28:30,710 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 11:28:30,711 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-07 11:28:30,711 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 11:28:30,761 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:28:30,761 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 11:28:30,804 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:28:30,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525748091] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 11:28:30,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 11:28:30,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-07 11:28:30,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055286517] [2024-11-07 11:28:30,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 11:28:30,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-07 11:28:30,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:28:30,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-07 11:28:30,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-11-07 11:28:30,806 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-07 11:28:30,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 732 transitions, 21688 flow. Second operand has 14 states, 14 states have (on average 6.071428571428571) internal successors, (85), 14 states have internal predecessors, (85), 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 11:28:30,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:28:30,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-07 11:28:30,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:28:36,678 INFO L124 PetriNetUnfolderBase]: 11866/19412 cut-off events. [2024-11-07 11:28:36,679 INFO L125 PetriNetUnfolderBase]: For 1719624/1719624 co-relation queries the response was YES. [2024-11-07 11:28:36,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230463 conditions, 19412 events. 11866/19412 cut-off events. For 1719624/1719624 co-relation queries the response was YES. Maximal size of possible extension queue 732. Compared 135639 event pairs, 570 based on Foata normal form. 71/19483 useless extension candidates. Maximal degree in co-relation 228462. Up to 6382 conditions per place. [2024-11-07 11:28:37,108 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 441 selfloop transitions, 857 changer transitions 73/1372 dead transitions. [2024-11-07 11:28:37,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 1372 transitions, 41134 flow [2024-11-07 11:28:37,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-07 11:28:37,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-07 11:28:37,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 183 transitions. [2024-11-07 11:28:37,109 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43779904306220097 [2024-11-07 11:28:37,109 INFO L175 Difference]: Start difference. First operand has 343 places, 732 transitions, 21688 flow. Second operand 19 states and 183 transitions. [2024-11-07 11:28:37,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 1372 transitions, 41134 flow [2024-11-07 11:28:50,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 1372 transitions, 39078 flow, removed 648 selfloop flow, removed 15 redundant places. [2024-11-07 11:28:50,527 INFO L231 Difference]: Finished difference. Result has 355 places, 1100 transitions, 34833 flow [2024-11-07 11:28:50,528 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=20771, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=493, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=34833, PETRI_PLACES=355, PETRI_TRANSITIONS=1100} [2024-11-07 11:28:50,529 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 331 predicate places. [2024-11-07 11:28:50,529 INFO L471 AbstractCegarLoop]: Abstraction has has 355 places, 1100 transitions, 34833 flow [2024-11-07 11:28:50,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.071428571428571) internal successors, (85), 14 states have internal predecessors, (85), 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 11:28:50,530 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:28:50,530 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:28:50,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-07 11:28:50,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:28:50,731 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-07 11:28:50,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:28:50,731 INFO L85 PathProgramCache]: Analyzing trace with hash -2113778485, now seen corresponding path program 17 times [2024-11-07 11:28:50,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:28:50,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870194890] [2024-11-07 11:28:50,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:28:50,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:28:50,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:28:50,805 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:28:50,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:28:50,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870194890] [2024-11-07 11:28:50,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870194890] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 11:28:50,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098313462] [2024-11-07 11:28:50,806 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-07 11:28:50,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 11:28:50,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 11:28:50,808 INFO L229 MonitoredProcess]: Starting monitored process 20 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 11:28:50,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-07 11:28:50,853 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-07 11:28:50,853 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 11:28:50,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-07 11:28:50,857 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 11:28:50,923 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:28:50,923 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 11:28:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:28:50,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098313462] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 11:28:50,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 11:28:50,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-11-07 11:28:50,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780069141] [2024-11-07 11:28:50,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 11:28:50,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-07 11:28:50,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:28:50,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-07 11:28:50,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-11-07 11:28:50,976 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-07 11:28:50,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 1100 transitions, 34833 flow. Second operand has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 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 11:28:50,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:28:50,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-07 11:28:50,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:28:59,559 INFO L124 PetriNetUnfolderBase]: 14889/24140 cut-off events. [2024-11-07 11:28:59,559 INFO L125 PetriNetUnfolderBase]: For 2284214/2284214 co-relation queries the response was YES. [2024-11-07 11:28:59,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294122 conditions, 24140 events. 14889/24140 cut-off events. For 2284214/2284214 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 171075 event pairs, 1282 based on Foata normal form. 58/24198 useless extension candidates. Maximal degree in co-relation 292104. Up to 5223 conditions per place. [2024-11-07 11:29:00,259 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 719 selfloop transitions, 766 changer transitions 9/1495 dead transitions. [2024-11-07 11:29:00,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 1495 transitions, 47444 flow [2024-11-07 11:29:00,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-07 11:29:00,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-07 11:29:00,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 217 transitions. [2024-11-07 11:29:00,260 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-11-07 11:29:00,260 INFO L175 Difference]: Start difference. First operand has 355 places, 1100 transitions, 34833 flow. Second operand 21 states and 217 transitions. [2024-11-07 11:29:00,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 1495 transitions, 47444 flow