./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i --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/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i', '-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', '801883caffd8b582a36607f9ec62109ac5c5dc10c811693a281fb396b4b60131'] 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/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i -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 801883caffd8b582a36607f9ec62109ac5c5dc10c811693a281fb396b4b60131 --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-07 11:09:37,119 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-07 11:09:37,231 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-07 11:09:37,243 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-07 11:09:37,243 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-07 11:09:37,274 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-07 11:09:37,275 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-07 11:09:37,275 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-07 11:09:37,275 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-07 11:09:37,275 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-07 11:09:37,276 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-07 11:09:37,276 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-07 11:09:37,276 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-07 11:09:37,276 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-07 11:09:37,276 INFO L153 SettingsManager]: * Use SBE=true [2024-11-07 11:09:37,276 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-07 11:09:37,276 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-07 11:09:37,276 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-07 11:09:37,277 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-07 11:09:37,277 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-07 11:09:37,277 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-07 11:09:37,277 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-07 11:09:37,277 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-07 11:09:37,277 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-07 11:09:37,277 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-07 11:09:37,279 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-07 11:09:37,279 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-07 11:09:37,279 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-07 11:09:37,279 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-07 11:09:37,279 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-07 11:09:37,280 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-07 11:09:37,280 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-07 11:09:37,280 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 11:09:37,280 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-07 11:09:37,280 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-07 11:09:37,280 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-07 11:09:37,280 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-07 11:09:37,280 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-07 11:09:37,280 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-07 11:09:37,280 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-07 11:09:37,280 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-07 11:09:37,280 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-07 11:09:37,280 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 -> 801883caffd8b582a36607f9ec62109ac5c5dc10c811693a281fb396b4b60131 [2024-11-07 11:09:37,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-07 11:09:37,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-07 11:09:37,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-07 11:09:37,602 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-07 11:09:37,602 INFO L274 PluginConnector]: CDTParser initialized [2024-11-07 11:09:37,604 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i [2024-11-07 11:09:38,969 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-07 11:09:39,234 INFO L384 CDTParser]: Found 1 translation units. [2024-11-07 11:09:39,235 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i [2024-11-07 11:09:39,247 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/137c179ac/b0f0af74811b46bf8f3e7c4108aadacf/FLAG5a69ae1d5 [2024-11-07 11:09:39,259 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/137c179ac/b0f0af74811b46bf8f3e7c4108aadacf [2024-11-07 11:09:39,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-07 11:09:39,263 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-07 11:09:39,266 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-07 11:09:39,266 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-07 11:09:39,271 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-07 11:09:39,272 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 11:09:39" (1/1) ... [2024-11-07 11:09:39,273 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20459f9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:09:39, skipping insertion in model container [2024-11-07 11:09:39,273 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 11:09:39" (1/1) ... [2024-11-07 11:09:39,302 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-07 11:09:39,516 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/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i[30570,30583] [2024-11-07 11:09:39,530 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 11:09:39,541 INFO L200 MainTranslator]: Completed pre-run [2024-11-07 11:09:39,586 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/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i[30570,30583] [2024-11-07 11:09:39,588 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 11:09:39,622 INFO L204 MainTranslator]: Completed translation [2024-11-07 11:09:39,623 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:09:39 WrapperNode [2024-11-07 11:09:39,623 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-07 11:09:39,624 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-07 11:09:39,624 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-07 11:09:39,624 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-07 11:09:39,631 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:09:39" (1/1) ... [2024-11-07 11:09:39,645 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:09:39" (1/1) ... [2024-11-07 11:09:39,662 INFO L138 Inliner]: procedures = 164, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2024-11-07 11:09:39,663 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-07 11:09:39,663 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-07 11:09:39,663 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-07 11:09:39,663 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-07 11:09:39,669 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:09:39" (1/1) ... [2024-11-07 11:09:39,670 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:09:39" (1/1) ... [2024-11-07 11:09:39,672 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:09:39" (1/1) ... [2024-11-07 11:09:39,684 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5]. The 0 writes are split as follows [0, 0]. [2024-11-07 11:09:39,685 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:09:39" (1/1) ... [2024-11-07 11:09:39,687 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:09:39" (1/1) ... [2024-11-07 11:09:39,695 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:09:39" (1/1) ... [2024-11-07 11:09:39,702 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:09:39" (1/1) ... [2024-11-07 11:09:39,704 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:09:39" (1/1) ... [2024-11-07 11:09:39,708 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:09:39" (1/1) ... [2024-11-07 11:09:39,710 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-07 11:09:39,712 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-07 11:09:39,715 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-07 11:09:39,715 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-07 11:09:39,716 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:09:39" (1/1) ... [2024-11-07 11:09:39,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 11:09:39,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 11:09:39,750 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 11:09:39,753 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 11:09:39,777 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-11-07 11:09:39,778 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-11-07 11:09:39,778 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-07 11:09:39,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-07 11:09:39,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-07 11:09:39,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-07 11:09:39,779 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-07 11:09:39,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-07 11:09:39,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-07 11:09:39,780 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 11:09:39,913 INFO L238 CfgBuilder]: Building ICFG [2024-11-07 11:09:39,915 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-07 11:09:40,068 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-07 11:09:40,069 INFO L287 CfgBuilder]: Performing block encoding [2024-11-07 11:09:40,192 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-07 11:09:40,192 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-07 11:09:40,193 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 11:09:40 BoogieIcfgContainer [2024-11-07 11:09:40,193 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-07 11:09:40,196 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-07 11:09:40,199 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-07 11:09:40,204 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-07 11:09:40,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 11:09:39" (1/3) ... [2024-11-07 11:09:40,205 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@762dee98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 11:09:40, skipping insertion in model container [2024-11-07 11:09:40,205 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:09:39" (2/3) ... [2024-11-07 11:09:40,205 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@762dee98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 11:09:40, skipping insertion in model container [2024-11-07 11:09:40,205 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 11:09:40" (3/3) ... [2024-11-07 11:09:40,206 INFO L112 eAbstractionObserver]: Analyzing ICFG 48_ticket_lock_low_contention_vs-pthread.i [2024-11-07 11:09:40,223 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-07 11:09:40,223 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-07 11:09:40,224 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-07 11:09:40,273 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-07 11:09:40,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 27 transitions, 58 flow [2024-11-07 11:09:40,370 INFO L124 PetriNetUnfolderBase]: 5/41 cut-off events. [2024-11-07 11:09:40,372 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 11:09:40,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 41 events. 5/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 95 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 24. Up to 4 conditions per place. [2024-11-07 11:09:40,377 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 27 transitions, 58 flow [2024-11-07 11:09:40,380 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 27 transitions, 58 flow [2024-11-07 11:09:40,391 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 11:09:40,406 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;@2b1215d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 11:09:40,408 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-07 11:09:40,417 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 11:09:40,420 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2024-11-07 11:09:40,420 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 11:09:40,420 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:09:40,421 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:09:40,422 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-07 11:09:40,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:09:40,426 INFO L85 PathProgramCache]: Analyzing trace with hash -2071616802, now seen corresponding path program 1 times [2024-11-07 11:09:40,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:09:40,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556452291] [2024-11-07 11:09:40,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:09:40,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:09:40,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:09:40,595 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 11:09:40,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:09:40,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556452291] [2024-11-07 11:09:40,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556452291] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 11:09:40,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 11:09:40,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 11:09:40,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745919755] [2024-11-07 11:09:40,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 11:09:40,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-07 11:09:40,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:09:40,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-07 11:09:40,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-07 11:09:40,634 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 27 [2024-11-07 11:09:40,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 58 flow. Second operand has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 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 11:09:40,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:09:40,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 27 [2024-11-07 11:09:40,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:09:40,702 INFO L124 PetriNetUnfolderBase]: 32/133 cut-off events. [2024-11-07 11:09:40,703 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 11:09:40,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 133 events. 32/133 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 571 event pairs, 32 based on Foata normal form. 15/128 useless extension candidates. Maximal degree in co-relation 193. Up to 87 conditions per place. [2024-11-07 11:09:40,705 INFO L140 encePairwiseOnDemand]: 24/27 looper letters, 14 selfloop transitions, 0 changer transitions 0/24 dead transitions. [2024-11-07 11:09:40,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 24 transitions, 80 flow [2024-11-07 11:09:40,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-07 11:09:40,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-07 11:09:40,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 37 transitions. [2024-11-07 11:09:40,719 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2024-11-07 11:09:40,720 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 58 flow. Second operand 2 states and 37 transitions. [2024-11-07 11:09:40,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 24 transitions, 80 flow [2024-11-07 11:09:40,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 24 transitions, 80 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-07 11:09:40,728 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 52 flow [2024-11-07 11:09:40,730 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=52, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2024-11-07 11:09:40,737 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 1 predicate places. [2024-11-07 11:09:40,737 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 52 flow [2024-11-07 11:09:40,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 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 11:09:40,737 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:09:40,738 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-07 11:09:40,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-07 11:09:40,738 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-07 11:09:40,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:09:40,738 INFO L85 PathProgramCache]: Analyzing trace with hash -2047487709, now seen corresponding path program 1 times [2024-11-07 11:09:40,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:09:40,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586687396] [2024-11-07 11:09:40,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:09:40,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:09:40,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 11:09:40,779 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-07 11:09:40,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 11:09:40,828 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-07 11:09:40,832 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-07 11:09:40,834 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-11-07 11:09:40,838 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-11-07 11:09:40,839 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-11-07 11:09:40,840 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-11-07 11:09:40,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-07 11:09:40,840 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-07 11:09:40,844 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-07 11:09:40,844 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-07 11:09:40,861 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-07 11:09:40,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 38 transitions, 86 flow [2024-11-07 11:09:40,883 INFO L124 PetriNetUnfolderBase]: 8/66 cut-off events. [2024-11-07 11:09:40,883 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-07 11:09:40,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 66 events. 8/66 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 201 event pairs, 0 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 43. Up to 6 conditions per place. [2024-11-07 11:09:40,884 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 38 transitions, 86 flow [2024-11-07 11:09:40,884 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 38 transitions, 86 flow [2024-11-07 11:09:40,886 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 11:09:40,886 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;@2b1215d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 11:09:40,888 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-07 11:09:40,896 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 11:09:40,896 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2024-11-07 11:09:40,896 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-07 11:09:40,896 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:09:40,897 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:09:40,897 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-07 11:09:40,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:09:40,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1582043964, now seen corresponding path program 1 times [2024-11-07 11:09:40,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:09:40,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54072446] [2024-11-07 11:09:40,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:09:40,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:09:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:09:40,942 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 11:09:40,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:09:40,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54072446] [2024-11-07 11:09:40,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54072446] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 11:09:40,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 11:09:40,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 11:09:40,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766355999] [2024-11-07 11:09:40,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 11:09:40,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-07 11:09:40,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:09:40,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-07 11:09:40,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-07 11:09:40,945 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 38 [2024-11-07 11:09:40,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 86 flow. Second operand has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 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 11:09:40,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:09:40,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 38 [2024-11-07 11:09:40,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:09:41,157 INFO L124 PetriNetUnfolderBase]: 372/910 cut-off events. [2024-11-07 11:09:41,158 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-07 11:09:41,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1582 conditions, 910 events. 372/910 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5875 event pairs, 372 based on Foata normal form. 126/909 useless extension candidates. Maximal degree in co-relation 1047. Up to 652 conditions per place. [2024-11-07 11:09:41,171 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 19 selfloop transitions, 0 changer transitions 0/34 dead transitions. [2024-11-07 11:09:41,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 116 flow [2024-11-07 11:09:41,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-07 11:09:41,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-07 11:09:41,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 53 transitions. [2024-11-07 11:09:41,175 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6973684210526315 [2024-11-07 11:09:41,175 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 86 flow. Second operand 2 states and 53 transitions. [2024-11-07 11:09:41,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 116 flow [2024-11-07 11:09:41,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 34 transitions, 116 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-07 11:09:41,176 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 78 flow [2024-11-07 11:09:41,176 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=78, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2024-11-07 11:09:41,180 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2024-11-07 11:09:41,180 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 78 flow [2024-11-07 11:09:41,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 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 11:09:41,180 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:09:41,181 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:09:41,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-07 11:09:41,181 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-07 11:09:41,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:09:41,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1093272610, now seen corresponding path program 1 times [2024-11-07 11:09:41,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:09:41,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572069804] [2024-11-07 11:09:41,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:09:41,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:09:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:09:41,336 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 11:09:41,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:09:41,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572069804] [2024-11-07 11:09:41,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572069804] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 11:09:41,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 11:09:41,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 11:09:41,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964836223] [2024-11-07 11:09:41,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 11:09:41,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 11:09:41,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:09:41,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 11:09:41,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 11:09:41,374 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-11-07 11:09:41,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:09:41,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:09:41,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-11-07 11:09:41,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:09:41,666 INFO L124 PetriNetUnfolderBase]: 967/1933 cut-off events. [2024-11-07 11:09:41,666 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-11-07 11:09:41,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3595 conditions, 1933 events. 967/1933 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12598 event pairs, 612 based on Foata normal form. 191/2066 useless extension candidates. Maximal degree in co-relation 3590. Up to 1239 conditions per place. [2024-11-07 11:09:41,677 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 39 selfloop transitions, 6 changer transitions 0/54 dead transitions. [2024-11-07 11:09:41,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 54 transitions, 213 flow [2024-11-07 11:09:41,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 11:09:41,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 11:09:41,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-11-07 11:09:41,679 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6578947368421053 [2024-11-07 11:09:41,679 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 78 flow. Second operand 3 states and 75 transitions. [2024-11-07 11:09:41,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 54 transitions, 213 flow [2024-11-07 11:09:41,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 54 transitions, 213 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-07 11:09:41,681 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 132 flow [2024-11-07 11:09:41,682 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2024-11-07 11:09:41,682 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 5 predicate places. [2024-11-07 11:09:41,682 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 132 flow [2024-11-07 11:09:41,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:09:41,682 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:09:41,683 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1] [2024-11-07 11:09:41,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-07 11:09:41,683 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-07 11:09:41,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:09:41,683 INFO L85 PathProgramCache]: Analyzing trace with hash -139676563, now seen corresponding path program 1 times [2024-11-07 11:09:41,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:09:41,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092768756] [2024-11-07 11:09:41,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:09:41,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:09:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 11:09:41,701 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-07 11:09:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 11:09:41,726 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-07 11:09:41,726 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-07 11:09:41,726 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-11-07 11:09:41,726 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-11-07 11:09:41,726 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-11-07 11:09:41,726 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-11-07 11:09:41,726 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-11-07 11:09:41,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-07 11:09:41,727 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-11-07 11:09:41,727 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-07 11:09:41,727 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-07 11:09:41,750 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-07 11:09:41,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 49 transitions, 116 flow [2024-11-07 11:09:41,766 INFO L124 PetriNetUnfolderBase]: 11/91 cut-off events. [2024-11-07 11:09:41,767 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-07 11:09:41,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 91 events. 11/91 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 310 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 72. Up to 8 conditions per place. [2024-11-07 11:09:41,768 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 49 transitions, 116 flow [2024-11-07 11:09:41,768 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 49 transitions, 116 flow [2024-11-07 11:09:41,771 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 11:09:41,772 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;@2b1215d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 11:09:41,772 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-11-07 11:09:41,777 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 11:09:41,777 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2024-11-07 11:09:41,777 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-07 11:09:41,777 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:09:41,778 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:09:41,778 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-11-07 11:09:41,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:09:41,778 INFO L85 PathProgramCache]: Analyzing trace with hash 405552789, now seen corresponding path program 1 times [2024-11-07 11:09:41,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:09:41,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830023686] [2024-11-07 11:09:41,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:09:41,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:09:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:09:41,826 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 11:09:41,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:09:41,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830023686] [2024-11-07 11:09:41,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830023686] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 11:09:41,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 11:09:41,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 11:09:41,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136778536] [2024-11-07 11:09:41,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 11:09:41,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-07 11:09:41,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:09:41,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-07 11:09:41,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-07 11:09:41,830 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-11-07 11:09:41,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 116 flow. Second operand has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:09:41,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:09:41,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-11-07 11:09:41,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:09:42,417 INFO L124 PetriNetUnfolderBase]: 2972/5695 cut-off events. [2024-11-07 11:09:42,418 INFO L125 PetriNetUnfolderBase]: For 197/197 co-relation queries the response was YES. [2024-11-07 11:09:42,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10193 conditions, 5695 events. 2972/5695 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 43934 event pairs, 2972 based on Foata normal form. 918/5958 useless extension candidates. Maximal degree in co-relation 2405. Up to 4377 conditions per place. [2024-11-07 11:09:42,470 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 24 selfloop transitions, 0 changer transitions 0/44 dead transitions. [2024-11-07 11:09:42,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 44 transitions, 154 flow [2024-11-07 11:09:42,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-07 11:09:42,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-07 11:09:42,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 69 transitions. [2024-11-07 11:09:42,471 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7040816326530612 [2024-11-07 11:09:42,471 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 116 flow. Second operand 2 states and 69 transitions. [2024-11-07 11:09:42,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 44 transitions, 154 flow [2024-11-07 11:09:42,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 44 transitions, 152 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-07 11:09:42,473 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 104 flow [2024-11-07 11:09:42,473 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=104, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2024-11-07 11:09:42,478 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2024-11-07 11:09:42,479 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 104 flow [2024-11-07 11:09:42,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:09:42,479 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:09:42,479 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:09:42,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-07 11:09:42,480 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-11-07 11:09:42,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:09:42,480 INFO L85 PathProgramCache]: Analyzing trace with hash 392684638, now seen corresponding path program 1 times [2024-11-07 11:09:42,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:09:42,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885745970] [2024-11-07 11:09:42,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:09:42,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:09:42,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:09:42,591 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 11:09:42,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:09:42,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885745970] [2024-11-07 11:09:42,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885745970] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 11:09:42,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 11:09:42,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 11:09:42,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482821306] [2024-11-07 11:09:42,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 11:09:42,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 11:09:42,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:09:42,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 11:09:42,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 11:09:42,636 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-11-07 11:09:42,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 11:09:42,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:09:42,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-11-07 11:09:42,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:09:44,289 INFO L124 PetriNetUnfolderBase]: 12179/20345 cut-off events. [2024-11-07 11:09:44,290 INFO L125 PetriNetUnfolderBase]: For 198/198 co-relation queries the response was YES. [2024-11-07 11:09:44,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38104 conditions, 20345 events. 12179/20345 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 995. Compared 162753 event pairs, 7347 based on Foata normal form. 1919/21798 useless extension candidates. Maximal degree in co-relation 38098. Up to 12688 conditions per place. [2024-11-07 11:09:44,467 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 50 selfloop transitions, 8 changer transitions 0/70 dead transitions. [2024-11-07 11:09:44,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 70 transitions, 282 flow [2024-11-07 11:09:44,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 11:09:44,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 11:09:44,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-11-07 11:09:44,471 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-07 11:09:44,472 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 104 flow. Second operand 3 states and 98 transitions. [2024-11-07 11:09:44,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 70 transitions, 282 flow [2024-11-07 11:09:44,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 70 transitions, 282 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-07 11:09:44,476 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 176 flow [2024-11-07 11:09:44,476 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-11-07 11:09:44,477 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2024-11-07 11:09:44,478 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 176 flow [2024-11-07 11:09:44,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 11:09:44,479 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:09:44,479 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2024-11-07 11:09:44,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-07 11:09:44,479 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-11-07 11:09:44,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:09:44,480 INFO L85 PathProgramCache]: Analyzing trace with hash -497894503, now seen corresponding path program 1 times [2024-11-07 11:09:44,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:09:44,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000012114] [2024-11-07 11:09:44,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:09:44,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:09:44,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 11:09:44,516 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-07 11:09:44,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 11:09:44,575 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-07 11:09:44,579 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-07 11:09:44,580 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-11-07 11:09:44,580 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-11-07 11:09:44,580 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2024-11-07 11:09:44,580 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-11-07 11:09:44,580 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-11-07 11:09:44,580 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-11-07 11:09:44,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-07 11:09:44,580 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-11-07 11:09:44,581 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-07 11:09:44,581 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-07 11:09:44,628 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-07 11:09:44,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 60 transitions, 148 flow [2024-11-07 11:09:44,657 INFO L124 PetriNetUnfolderBase]: 14/116 cut-off events. [2024-11-07 11:09:44,658 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-07 11:09:44,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 116 events. 14/116 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 417 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 102. Up to 10 conditions per place. [2024-11-07 11:09:44,662 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 60 transitions, 148 flow [2024-11-07 11:09:44,663 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 60 transitions, 148 flow [2024-11-07 11:09:44,665 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 11:09:44,665 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;@2b1215d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 11:09:44,665 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-07 11:09:44,667 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 11:09:44,671 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2024-11-07 11:09:44,671 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-07 11:09:44,671 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:09:44,672 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:09:44,672 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-07 11:09:44,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:09:44,672 INFO L85 PathProgramCache]: Analyzing trace with hash -403793839, now seen corresponding path program 1 times [2024-11-07 11:09:44,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:09:44,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025707891] [2024-11-07 11:09:44,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:09:44,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:09:44,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:09:44,694 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 11:09:44,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:09:44,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025707891] [2024-11-07 11:09:44,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025707891] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 11:09:44,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 11:09:44,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 11:09:44,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101087778] [2024-11-07 11:09:44,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 11:09:44,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-07 11:09:44,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:09:44,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-07 11:09:44,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-07 11:09:44,698 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-11-07 11:09:44,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 148 flow. Second operand has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 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 11:09:44,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:09:44,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-11-07 11:09:44,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:09:47,527 INFO L124 PetriNetUnfolderBase]: 20472/34284 cut-off events. [2024-11-07 11:09:47,528 INFO L125 PetriNetUnfolderBase]: For 1815/1815 co-relation queries the response was YES. [2024-11-07 11:09:47,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62533 conditions, 34284 events. 20472/34284 cut-off events. For 1815/1815 co-relation queries the response was YES. Maximal size of possible extension queue 1491. Compared 296396 event pairs, 20472 based on Foata normal form. 6043/37036 useless extension candidates. Maximal degree in co-relation 10265. Up to 27502 conditions per place. [2024-11-07 11:09:47,754 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 29 selfloop transitions, 0 changer transitions 0/54 dead transitions. [2024-11-07 11:09:47,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 54 transitions, 194 flow [2024-11-07 11:09:47,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-07 11:09:47,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-07 11:09:47,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 85 transitions. [2024-11-07 11:09:47,757 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2024-11-07 11:09:47,757 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 148 flow. Second operand 2 states and 85 transitions. [2024-11-07 11:09:47,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 54 transitions, 194 flow [2024-11-07 11:09:47,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 54 transitions, 188 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-11-07 11:09:47,761 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 130 flow [2024-11-07 11:09:47,761 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=130, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2024-11-07 11:09:47,762 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 1 predicate places. [2024-11-07 11:09:47,762 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 130 flow [2024-11-07 11:09:47,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 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 11:09:47,762 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:09:47,762 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:09:47,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-07 11:09:47,762 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-07 11:09:47,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:09:47,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1072743006, now seen corresponding path program 1 times [2024-11-07 11:09:47,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:09:47,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058026328] [2024-11-07 11:09:47,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:09:47,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:09:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:09:47,843 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 11:09:47,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:09:47,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058026328] [2024-11-07 11:09:47,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058026328] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 11:09:47,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 11:09:47,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 11:09:47,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706071606] [2024-11-07 11:09:47,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 11:09:47,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 11:09:47,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:09:47,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 11:09:47,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 11:09:47,873 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 60 [2024-11-07 11:09:47,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:09:47,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:09:47,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 60 [2024-11-07 11:09:47,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:09:57,403 INFO L124 PetriNetUnfolderBase]: 129035/194871 cut-off events. [2024-11-07 11:09:57,403 INFO L125 PetriNetUnfolderBase]: For 2050/2050 co-relation queries the response was YES. [2024-11-07 11:09:57,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367575 conditions, 194871 events. 129035/194871 cut-off events. For 2050/2050 co-relation queries the response was YES. Maximal size of possible extension queue 7300. Compared 1744769 event pairs, 75131 based on Foata normal form. 17945/209104 useless extension candidates. Maximal degree in co-relation 367568. Up to 118406 conditions per place. [2024-11-07 11:09:58,495 INFO L140 encePairwiseOnDemand]: 45/60 looper letters, 61 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2024-11-07 11:09:58,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 86 transitions, 351 flow [2024-11-07 11:09:58,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 11:09:58,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 11:09:58,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 121 transitions. [2024-11-07 11:09:58,496 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6722222222222223 [2024-11-07 11:09:58,496 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 130 flow. Second operand 3 states and 121 transitions. [2024-11-07 11:09:58,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 86 transitions, 351 flow [2024-11-07 11:09:58,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 86 transitions, 351 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-07 11:09:58,504 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 220 flow [2024-11-07 11:09:58,504 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2024-11-07 11:09:58,505 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 5 predicate places. [2024-11-07 11:09:58,505 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 220 flow [2024-11-07 11:09:58,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:09:58,505 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:09:58,505 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2024-11-07 11:09:58,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-07 11:09:58,505 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-07 11:09:58,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:09:58,505 INFO L85 PathProgramCache]: Analyzing trace with hash 135108864, now seen corresponding path program 1 times [2024-11-07 11:09:58,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:09:58,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070698854] [2024-11-07 11:09:58,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:09:58,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:09:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 11:09:58,528 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-07 11:09:58,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 11:09:58,545 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-07 11:09:58,546 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-07 11:09:58,546 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-07 11:09:58,546 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2024-11-07 11:09:58,546 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2024-11-07 11:09:58,546 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2024-11-07 11:09:58,546 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2024-11-07 11:09:58,546 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2024-11-07 11:09:58,546 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2024-11-07 11:09:58,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-07 11:09:58,547 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-11-07 11:09:58,547 WARN L244 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-07 11:09:58,547 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-11-07 11:09:58,579 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-07 11:09:58,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 71 transitions, 182 flow [2024-11-07 11:09:58,589 INFO L124 PetriNetUnfolderBase]: 17/141 cut-off events. [2024-11-07 11:09:58,589 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-11-07 11:09:58,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 141 events. 17/141 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 522 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 133. Up to 12 conditions per place. [2024-11-07 11:09:58,589 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 71 transitions, 182 flow [2024-11-07 11:09:58,591 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 71 transitions, 182 flow [2024-11-07 11:09:58,591 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 11:09:58,592 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;@2b1215d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 11:09:58,592 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-11-07 11:09:58,593 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 11:09:58,594 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2024-11-07 11:09:58,594 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-07 11:09:58,594 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:09:58,594 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:09:58,594 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-07 11:09:58,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:09:58,595 INFO L85 PathProgramCache]: Analyzing trace with hash 284883448, now seen corresponding path program 1 times [2024-11-07 11:09:58,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:09:58,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049689240] [2024-11-07 11:09:58,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:09:58,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:09:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:09:58,610 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 11:09:58,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:09:58,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049689240] [2024-11-07 11:09:58,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049689240] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 11:09:58,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 11:09:58,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 11:09:58,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585296393] [2024-11-07 11:09:58,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 11:09:58,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-07 11:09:58,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:09:58,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-07 11:09:58,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-07 11:09:58,615 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 71 [2024-11-07 11:09:58,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 182 flow. Second operand has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 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 11:09:58,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:09:58,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 71 [2024-11-07 11:09:58,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 11:10:10,021 INFO L124 PetriNetUnfolderBase]: 130472/199729 cut-off events. [2024-11-07 11:10:10,022 INFO L125 PetriNetUnfolderBase]: For 14310/14310 co-relation queries the response was YES. [2024-11-07 11:10:10,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369854 conditions, 199729 events. 130472/199729 cut-off events. For 14310/14310 co-relation queries the response was YES. Maximal size of possible extension queue 7137. Compared 1843045 event pairs, 130472 based on Foata normal form. 37293/220551 useless extension candidates. Maximal degree in co-relation 62729. Up to 165627 conditions per place. [2024-11-07 11:10:11,202 INFO L140 encePairwiseOnDemand]: 64/71 looper letters, 34 selfloop transitions, 0 changer transitions 0/64 dead transitions. [2024-11-07 11:10:11,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 64 transitions, 236 flow [2024-11-07 11:10:11,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-07 11:10:11,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-07 11:10:11,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 101 transitions. [2024-11-07 11:10:11,203 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7112676056338029 [2024-11-07 11:10:11,203 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 182 flow. Second operand 2 states and 101 transitions. [2024-11-07 11:10:11,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 64 transitions, 236 flow [2024-11-07 11:10:11,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 64 transitions, 224 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-11-07 11:10:11,213 INFO L231 Difference]: Finished difference. Result has 76 places, 64 transitions, 156 flow [2024-11-07 11:10:11,213 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=156, PETRI_PLACES=76, PETRI_TRANSITIONS=64} [2024-11-07 11:10:11,214 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 1 predicate places. [2024-11-07 11:10:11,214 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 64 transitions, 156 flow [2024-11-07 11:10:11,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 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 11:10:11,214 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:10:11,214 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:10:11,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-07 11:10:11,215 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-07 11:10:11,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:10:11,215 INFO L85 PathProgramCache]: Analyzing trace with hash 946902494, now seen corresponding path program 1 times [2024-11-07 11:10:11,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:10:11,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114943947] [2024-11-07 11:10:11,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:10:11,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:10:11,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:10:11,270 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 11:10:11,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:10:11,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114943947] [2024-11-07 11:10:11,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114943947] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 11:10:11,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 11:10:11,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 11:10:11,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45561029] [2024-11-07 11:10:11,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 11:10:11,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 11:10:11,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:10:11,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 11:10:11,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 11:10:11,304 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 71 [2024-11-07 11:10:11,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 64 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 11:10:11,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:10:11,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 71 [2024-11-07 11:10:11,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand