./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-atomic/peterson.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/peterson.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-atomic/peterson.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/peterson.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 20:02:15,108 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:02:15,177 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:02:15,182 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:02:15,183 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:02:15,209 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:02:15,209 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:02:15,209 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:02:15,210 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:02:15,213 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:02:15,214 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:02:15,214 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:02:15,215 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:02:15,216 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:02:15,216 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:02:15,216 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:02:15,217 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:02:15,217 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:02:15,217 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:02:15,217 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:02:15,217 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:02:15,218 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:02:15,218 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:02:15,218 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:02:15,218 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:02:15,219 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:02:15,219 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:02:15,219 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:02:15,220 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:02:15,220 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:02:15,221 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:02:15,221 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:02:15,221 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:02:15,221 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:02:15,221 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:02:15,222 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:02:15,222 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:02:15,222 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:02:15,229 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:02:15,229 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:02:15,230 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:02:15,230 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:02:15,230 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:02:15,230 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:02:15,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:02:15,512 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:02:15,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:02:15,514 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:02:15,515 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:02:15,516 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/peterson.yml/witness.yml [2024-06-21 20:02:15,610 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:02:15,610 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:02:15,611 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/peterson.i [2024-06-21 20:02:16,679 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:02:16,895 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:02:16,896 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/peterson.i [2024-06-21 20:02:16,914 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd314d7db/39c7e1dc51444e6fa0b3d20256be7a77/FLAG552b4e505 [2024-06-21 20:02:16,925 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd314d7db/39c7e1dc51444e6fa0b3d20256be7a77 [2024-06-21 20:02:16,926 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:02:16,926 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:02:16,929 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:02:16,929 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:02:16,932 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:02:16,933 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:02:15" (1/2) ... [2024-06-21 20:02:16,934 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a147a0e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:16, skipping insertion in model container [2024-06-21 20:02:16,934 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:02:15" (1/2) ... [2024-06-21 20:02:16,935 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@8fa117d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:16, skipping insertion in model container [2024-06-21 20:02:16,935 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:02:16" (2/2) ... [2024-06-21 20:02:16,937 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a147a0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:16, skipping insertion in model container [2024-06-21 20:02:16,938 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:02:16" (2/2) ... [2024-06-21 20:02:16,938 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:02:16,967 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:02:16,968 INFO L97 edCorrectnessWitness]: Location invariant before [L762-L762] ((((! multithreaded || (turn == 0 || turn == 1)) && (! multithreaded || (flag2 == 0 || flag2 == 1))) && (! multithreaded || (flag1 == 0 || flag1 == 1))) && (! multithreaded || (((flag1 == 0 || flag1 == 1) && (flag2 == 0 || flag2 == 1)) && (turn == 0 || turn == 1)))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-21 20:02:16,968 INFO L97 edCorrectnessWitness]: Location invariant before [L763-L763] ((((! multithreaded || (turn == 0 || turn == 1)) && (! multithreaded || (flag2 == 0 || flag2 == 1))) && (! multithreaded || (flag1 == 0 || flag1 == 1))) && (! multithreaded || (((flag1 == 0 || flag1 == 1) && (flag2 == 0 || flag2 == 1)) && (turn == 0 || turn == 1)))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-21 20:02:16,968 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:02:16,968 INFO L106 edCorrectnessWitness]: ghost_update [L761-L761] multithreaded = 1; [2024-06-21 20:02:17,006 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:02:17,317 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:02:17,325 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:02:17,419 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:02:17,450 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:02:17,451 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:17 WrapperNode [2024-06-21 20:02:17,451 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:02:17,452 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:02:17,452 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:02:17,452 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:02:17,457 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:17" (1/1) ... [2024-06-21 20:02:17,482 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:17" (1/1) ... [2024-06-21 20:02:17,509 INFO L138 Inliner]: procedures = 169, calls = 38, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 103 [2024-06-21 20:02:17,509 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:02:17,510 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:02:17,511 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:02:17,511 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:02:17,537 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:17" (1/1) ... [2024-06-21 20:02:17,537 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:17" (1/1) ... [2024-06-21 20:02:17,552 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:17" (1/1) ... [2024-06-21 20:02:17,568 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 20:02:17,568 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:17" (1/1) ... [2024-06-21 20:02:17,568 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:17" (1/1) ... [2024-06-21 20:02:17,571 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:17" (1/1) ... [2024-06-21 20:02:17,576 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:17" (1/1) ... [2024-06-21 20:02:17,578 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:17" (1/1) ... [2024-06-21 20:02:17,580 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:17" (1/1) ... [2024-06-21 20:02:17,584 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:02:17,585 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:02:17,585 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:02:17,585 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:02:17,614 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:17" (1/1) ... [2024-06-21 20:02:17,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:02:17,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:02:17,640 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 20:02:17,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 20:02:17,679 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2024-06-21 20:02:17,679 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2024-06-21 20:02:17,679 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-06-21 20:02:17,679 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-06-21 20:02:17,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:02:17,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:02:17,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:02:17,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:02:17,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:02:17,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:02:17,681 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 20:02:17,781 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:02:17,783 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:02:17,910 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:02:17,910 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:02:17,972 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:02:17,972 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-06-21 20:02:17,972 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:02:17 BoogieIcfgContainer [2024-06-21 20:02:17,973 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:02:17,974 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:02:17,974 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:02:17,977 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:02:17,984 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:02:15" (1/4) ... [2024-06-21 20:02:17,985 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d7a1c6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:02:17, skipping insertion in model container [2024-06-21 20:02:17,986 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:02:16" (2/4) ... [2024-06-21 20:02:17,986 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d7a1c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:02:17, skipping insertion in model container [2024-06-21 20:02:17,987 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:02:17" (3/4) ... [2024-06-21 20:02:17,987 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d7a1c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:02:17, skipping insertion in model container [2024-06-21 20:02:17,987 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:02:17" (4/4) ... [2024-06-21 20:02:17,988 INFO L112 eAbstractionObserver]: Analyzing ICFG peterson.i [2024-06-21 20:02:18,002 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:02:18,002 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-21 20:02:18,002 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:02:18,050 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-21 20:02:18,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 37 transitions, 88 flow [2024-06-21 20:02:18,116 INFO L124 PetriNetUnfolderBase]: 2/35 cut-off events. [2024-06-21 20:02:18,117 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-21 20:02:18,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 35 events. 2/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 51 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 31. Up to 2 conditions per place. [2024-06-21 20:02:18,120 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 37 transitions, 88 flow [2024-06-21 20:02:18,123 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 33 transitions, 75 flow [2024-06-21 20:02:18,138 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:02:18,143 INFO L357 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, mHoare=false, 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;@699670cf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:02:18,144 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-21 20:02:18,148 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:02:18,148 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 20:02:18,148 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:02:18,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:18,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:02:18,149 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:18,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:18,155 INFO L85 PathProgramCache]: Analyzing trace with hash 210989746, now seen corresponding path program 1 times [2024-06-21 20:02:18,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:18,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462507563] [2024-06-21 20:02:18,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:18,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:18,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:18,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:18,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462507563] [2024-06-21 20:02:18,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462507563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:18,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:18,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:02:18,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770323359] [2024-06-21 20:02:18,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:18,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:02:18,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:18,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:02:18,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:02:18,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 37 [2024-06-21 20:02:18,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 75 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) [2024-06-21 20:02:18,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:18,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 37 [2024-06-21 20:02:18,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:18,619 INFO L124 PetriNetUnfolderBase]: 105/277 cut-off events. [2024-06-21 20:02:18,619 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-06-21 20:02:18,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 470 conditions, 277 events. 105/277 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1296 event pairs, 50 based on Foata normal form. 1/256 useless extension candidates. Maximal degree in co-relation 441. Up to 168 conditions per place. [2024-06-21 20:02:18,622 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 19 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2024-06-21 20:02:18,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 39 transitions, 134 flow [2024-06-21 20:02:18,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:02:18,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:02:18,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-06-21 20:02:18,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7297297297297297 [2024-06-21 20:02:18,634 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 75 flow. Second operand 3 states and 81 transitions. [2024-06-21 20:02:18,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 39 transitions, 134 flow [2024-06-21 20:02:18,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 39 transitions, 128 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 20:02:18,639 INFO L231 Difference]: Finished difference. Result has 38 places, 35 transitions, 91 flow [2024-06-21 20:02:18,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=38, PETRI_TRANSITIONS=35} [2024-06-21 20:02:18,644 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2024-06-21 20:02:18,645 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 35 transitions, 91 flow [2024-06-21 20:02:18,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:18,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:18,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:18,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:02:18,649 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:18,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:18,650 INFO L85 PathProgramCache]: Analyzing trace with hash 897716593, now seen corresponding path program 1 times [2024-06-21 20:02:18,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:18,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906688156] [2024-06-21 20:02:18,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:18,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:18,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:18,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:18,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:18,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906688156] [2024-06-21 20:02:18,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906688156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:18,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:18,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:02:18,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076488011] [2024-06-21 20:02:18,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:18,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:02:18,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:18,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:02:18,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:02:18,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2024-06-21 20:02:18,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 91 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:18,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:18,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2024-06-21 20:02:18,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:18,992 INFO L124 PetriNetUnfolderBase]: 121/290 cut-off events. [2024-06-21 20:02:18,993 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2024-06-21 20:02:18,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 290 events. 121/290 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1347 event pairs, 52 based on Foata normal form. 2/272 useless extension candidates. Maximal degree in co-relation 449. Up to 191 conditions per place. [2024-06-21 20:02:18,997 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 24 selfloop transitions, 5 changer transitions 0/45 dead transitions. [2024-06-21 20:02:18,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 45 transitions, 175 flow [2024-06-21 20:02:18,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:02:18,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:02:18,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-21 20:02:18,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6959459459459459 [2024-06-21 20:02:18,999 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 91 flow. Second operand 4 states and 103 transitions. [2024-06-21 20:02:18,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 45 transitions, 175 flow [2024-06-21 20:02:19,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 45 transitions, 172 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:02:19,001 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 115 flow [2024-06-21 20:02:19,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2024-06-21 20:02:19,001 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2024-06-21 20:02:19,002 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 115 flow [2024-06-21 20:02:19,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:19,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:19,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:19,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:02:19,003 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:19,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:19,003 INFO L85 PathProgramCache]: Analyzing trace with hash 2059411718, now seen corresponding path program 1 times [2024-06-21 20:02:19,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:19,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568852959] [2024-06-21 20:02:19,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:19,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:19,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:19,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:19,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:19,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568852959] [2024-06-21 20:02:19,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568852959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:19,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:19,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:02:19,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478884906] [2024-06-21 20:02:19,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:19,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:02:19,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:19,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:02:19,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:02:19,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2024-06-21 20:02:19,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 115 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 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) [2024-06-21 20:02:19,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:19,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2024-06-21 20:02:19,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:19,183 INFO L124 PetriNetUnfolderBase]: 143/321 cut-off events. [2024-06-21 20:02:19,183 INFO L125 PetriNetUnfolderBase]: For 148/148 co-relation queries the response was YES. [2024-06-21 20:02:19,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 715 conditions, 321 events. 143/321 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1461 event pairs, 51 based on Foata normal form. 4/313 useless extension candidates. Maximal degree in co-relation 537. Up to 185 conditions per place. [2024-06-21 20:02:19,187 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 29 selfloop transitions, 8 changer transitions 0/52 dead transitions. [2024-06-21 20:02:19,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 232 flow [2024-06-21 20:02:19,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:02:19,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:02:19,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-21 20:02:19,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6648648648648648 [2024-06-21 20:02:19,193 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 115 flow. Second operand 5 states and 123 transitions. [2024-06-21 20:02:19,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 232 flow [2024-06-21 20:02:19,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 52 transitions, 223 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 20:02:19,198 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 139 flow [2024-06-21 20:02:19,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=139, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2024-06-21 20:02:19,199 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 6 predicate places. [2024-06-21 20:02:19,199 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 139 flow [2024-06-21 20:02:19,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 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) [2024-06-21 20:02:19,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:19,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:19,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:02:19,200 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:19,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:19,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1646965865, now seen corresponding path program 1 times [2024-06-21 20:02:19,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:19,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924573521] [2024-06-21 20:02:19,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:19,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:19,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:19,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:19,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924573521] [2024-06-21 20:02:19,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924573521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:19,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:19,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:02:19,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455564470] [2024-06-21 20:02:19,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:19,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:02:19,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:19,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:02:19,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:02:19,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 37 [2024-06-21 20:02:19,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 139 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:19,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:19,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 37 [2024-06-21 20:02:19,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:19,384 INFO L124 PetriNetUnfolderBase]: 125/294 cut-off events. [2024-06-21 20:02:19,385 INFO L125 PetriNetUnfolderBase]: For 250/250 co-relation queries the response was YES. [2024-06-21 20:02:19,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709 conditions, 294 events. 125/294 cut-off events. For 250/250 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1324 event pairs, 46 based on Foata normal form. 1/283 useless extension candidates. Maximal degree in co-relation 580. Up to 200 conditions per place. [2024-06-21 20:02:19,387 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 24 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2024-06-21 20:02:19,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 215 flow [2024-06-21 20:02:19,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:02:19,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:02:19,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-21 20:02:19,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.668918918918919 [2024-06-21 20:02:19,388 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 139 flow. Second operand 4 states and 99 transitions. [2024-06-21 20:02:19,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 215 flow [2024-06-21 20:02:19,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 203 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 20:02:19,390 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 152 flow [2024-06-21 20:02:19,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-21 20:02:19,391 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 8 predicate places. [2024-06-21 20:02:19,391 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 152 flow [2024-06-21 20:02:19,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:19,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:19,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:19,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:02:19,392 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:19,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:19,392 INFO L85 PathProgramCache]: Analyzing trace with hash 2119259478, now seen corresponding path program 1 times [2024-06-21 20:02:19,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:19,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821008122] [2024-06-21 20:02:19,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:19,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:19,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:19,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:19,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821008122] [2024-06-21 20:02:19,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821008122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:19,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:19,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:02:19,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087038464] [2024-06-21 20:02:19,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:19,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:02:19,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:19,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:02:19,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:02:19,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2024-06-21 20:02:19,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:19,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:19,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2024-06-21 20:02:19,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:19,589 INFO L124 PetriNetUnfolderBase]: 143/316 cut-off events. [2024-06-21 20:02:19,589 INFO L125 PetriNetUnfolderBase]: For 370/385 co-relation queries the response was YES. [2024-06-21 20:02:19,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 820 conditions, 316 events. 143/316 cut-off events. For 370/385 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1372 event pairs, 54 based on Foata normal form. 3/307 useless extension candidates. Maximal degree in co-relation 678. Up to 220 conditions per place. [2024-06-21 20:02:19,591 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 30 selfloop transitions, 10 changer transitions 0/55 dead transitions. [2024-06-21 20:02:19,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 55 transitions, 280 flow [2024-06-21 20:02:19,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:02:19,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:02:19,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-21 20:02:19,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6594594594594595 [2024-06-21 20:02:19,593 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 152 flow. Second operand 5 states and 122 transitions. [2024-06-21 20:02:19,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 55 transitions, 280 flow [2024-06-21 20:02:19,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 55 transitions, 271 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 20:02:19,595 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 188 flow [2024-06-21 20:02:19,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=188, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2024-06-21 20:02:19,596 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 11 predicate places. [2024-06-21 20:02:19,596 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 188 flow [2024-06-21 20:02:19,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:19,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:19,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:19,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:02:19,597 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:19,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:19,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1334452546, now seen corresponding path program 2 times [2024-06-21 20:02:19,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:19,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036299242] [2024-06-21 20:02:19,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:19,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:19,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:19,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036299242] [2024-06-21 20:02:19,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036299242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:19,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:19,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:02:19,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159822805] [2024-06-21 20:02:19,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:19,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:02:19,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:19,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:02:19,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:02:19,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2024-06-21 20:02:19,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:19,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:19,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2024-06-21 20:02:19,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:19,761 INFO L124 PetriNetUnfolderBase]: 142/320 cut-off events. [2024-06-21 20:02:19,762 INFO L125 PetriNetUnfolderBase]: For 555/568 co-relation queries the response was YES. [2024-06-21 20:02:19,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 879 conditions, 320 events. 142/320 cut-off events. For 555/568 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1434 event pairs, 57 based on Foata normal form. 7/317 useless extension candidates. Maximal degree in co-relation 587. Up to 218 conditions per place. [2024-06-21 20:02:19,764 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 26 selfloop transitions, 10 changer transitions 0/51 dead transitions. [2024-06-21 20:02:19,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 51 transitions, 274 flow [2024-06-21 20:02:19,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:02:19,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:02:19,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-21 20:02:19,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6378378378378379 [2024-06-21 20:02:19,766 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 188 flow. Second operand 5 states and 118 transitions. [2024-06-21 20:02:19,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 51 transitions, 274 flow [2024-06-21 20:02:19,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 264 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-21 20:02:19,770 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 203 flow [2024-06-21 20:02:19,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=203, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-06-21 20:02:19,772 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 15 predicate places. [2024-06-21 20:02:19,772 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 203 flow [2024-06-21 20:02:19,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:19,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:19,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:19,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:02:19,774 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:19,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:19,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1802758047, now seen corresponding path program 1 times [2024-06-21 20:02:19,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:19,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451124102] [2024-06-21 20:02:19,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:19,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:19,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:19,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:19,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:19,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451124102] [2024-06-21 20:02:19,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451124102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:19,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:19,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:19,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82459391] [2024-06-21 20:02:19,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:19,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:19,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:19,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:19,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:19,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:19,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 203 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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) [2024-06-21 20:02:19,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:19,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:19,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:19,968 INFO L124 PetriNetUnfolderBase]: 195/456 cut-off events. [2024-06-21 20:02:19,968 INFO L125 PetriNetUnfolderBase]: For 900/914 co-relation queries the response was YES. [2024-06-21 20:02:19,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1198 conditions, 456 events. 195/456 cut-off events. For 900/914 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2238 event pairs, 26 based on Foata normal form. 10/461 useless extension candidates. Maximal degree in co-relation 865. Up to 134 conditions per place. [2024-06-21 20:02:19,971 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 46 selfloop transitions, 12 changer transitions 2/74 dead transitions. [2024-06-21 20:02:19,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 74 transitions, 433 flow [2024-06-21 20:02:19,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:19,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:19,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 20:02:19,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-21 20:02:19,972 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 203 flow. Second operand 6 states and 148 transitions. [2024-06-21 20:02:19,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 74 transitions, 433 flow [2024-06-21 20:02:19,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 74 transitions, 406 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 20:02:19,975 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 233 flow [2024-06-21 20:02:19,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=233, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2024-06-21 20:02:19,975 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 19 predicate places. [2024-06-21 20:02:19,975 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 233 flow [2024-06-21 20:02:19,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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) [2024-06-21 20:02:19,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:19,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:19,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:02:19,976 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:19,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:19,977 INFO L85 PathProgramCache]: Analyzing trace with hash 271121313, now seen corresponding path program 1 times [2024-06-21 20:02:19,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:19,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035269806] [2024-06-21 20:02:19,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:19,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:20,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:20,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035269806] [2024-06-21 20:02:20,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035269806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:20,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:20,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:20,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453232851] [2024-06-21 20:02:20,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:20,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:20,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:20,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:20,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:20,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:20,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 233 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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) [2024-06-21 20:02:20,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:20,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:20,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:20,163 INFO L124 PetriNetUnfolderBase]: 241/547 cut-off events. [2024-06-21 20:02:20,164 INFO L125 PetriNetUnfolderBase]: For 1494/1513 co-relation queries the response was YES. [2024-06-21 20:02:20,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1643 conditions, 547 events. 241/547 cut-off events. For 1494/1513 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2751 event pairs, 54 based on Foata normal form. 14/553 useless extension candidates. Maximal degree in co-relation 1213. Up to 176 conditions per place. [2024-06-21 20:02:20,168 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 41 selfloop transitions, 22 changer transitions 1/78 dead transitions. [2024-06-21 20:02:20,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 78 transitions, 505 flow [2024-06-21 20:02:20,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:20,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:20,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 20:02:20,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-21 20:02:20,170 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 233 flow. Second operand 6 states and 148 transitions. [2024-06-21 20:02:20,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 78 transitions, 505 flow [2024-06-21 20:02:20,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 78 transitions, 495 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-21 20:02:20,174 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 354 flow [2024-06-21 20:02:20,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=354, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2024-06-21 20:02:20,179 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2024-06-21 20:02:20,179 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 354 flow [2024-06-21 20:02:20,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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) [2024-06-21 20:02:20,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:20,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:20,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:02:20,181 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:20,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:20,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1272535939, now seen corresponding path program 2 times [2024-06-21 20:02:20,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:20,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418591299] [2024-06-21 20:02:20,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:20,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:20,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:20,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:20,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:20,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418591299] [2024-06-21 20:02:20,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418591299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:20,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:20,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:20,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838176922] [2024-06-21 20:02:20,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:20,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:20,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:20,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:20,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:20,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:20,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 354 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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) [2024-06-21 20:02:20,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:20,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:20,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:20,394 INFO L124 PetriNetUnfolderBase]: 271/623 cut-off events. [2024-06-21 20:02:20,394 INFO L125 PetriNetUnfolderBase]: For 2391/2418 co-relation queries the response was YES. [2024-06-21 20:02:20,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2079 conditions, 623 events. 271/623 cut-off events. For 2391/2418 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3330 event pairs, 59 based on Foata normal form. 20/631 useless extension candidates. Maximal degree in co-relation 1609. Up to 183 conditions per place. [2024-06-21 20:02:20,399 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 42 selfloop transitions, 24 changer transitions 1/81 dead transitions. [2024-06-21 20:02:20,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 81 transitions, 634 flow [2024-06-21 20:02:20,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:20,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:20,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 20:02:20,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6576576576576577 [2024-06-21 20:02:20,401 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 354 flow. Second operand 6 states and 146 transitions. [2024-06-21 20:02:20,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 81 transitions, 634 flow [2024-06-21 20:02:20,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 81 transitions, 620 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-06-21 20:02:20,405 INFO L231 Difference]: Finished difference. Result has 70 places, 63 transitions, 437 flow [2024-06-21 20:02:20,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=437, PETRI_PLACES=70, PETRI_TRANSITIONS=63} [2024-06-21 20:02:20,406 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 32 predicate places. [2024-06-21 20:02:20,406 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 63 transitions, 437 flow [2024-06-21 20:02:20,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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) [2024-06-21 20:02:20,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:20,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:20,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:02:20,406 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:20,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:20,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1270439519, now seen corresponding path program 3 times [2024-06-21 20:02:20,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:20,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890263785] [2024-06-21 20:02:20,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:20,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:20,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:20,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890263785] [2024-06-21 20:02:20,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890263785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:20,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:20,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:20,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239642473] [2024-06-21 20:02:20,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:20,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:20,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:20,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:20,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:20,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:20,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 63 transitions, 437 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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) [2024-06-21 20:02:20,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:20,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:20,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:20,580 INFO L124 PetriNetUnfolderBase]: 263/608 cut-off events. [2024-06-21 20:02:20,581 INFO L125 PetriNetUnfolderBase]: For 2938/2965 co-relation queries the response was YES. [2024-06-21 20:02:20,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2119 conditions, 608 events. 263/608 cut-off events. For 2938/2965 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3192 event pairs, 47 based on Foata normal form. 12/613 useless extension candidates. Maximal degree in co-relation 1502. Up to 158 conditions per place. [2024-06-21 20:02:20,585 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 42 selfloop transitions, 21 changer transitions 2/79 dead transitions. [2024-06-21 20:02:20,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 669 flow [2024-06-21 20:02:20,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:20,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:20,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-21 20:02:20,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6531531531531531 [2024-06-21 20:02:20,587 INFO L175 Difference]: Start difference. First operand has 70 places, 63 transitions, 437 flow. Second operand 6 states and 145 transitions. [2024-06-21 20:02:20,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 669 flow [2024-06-21 20:02:20,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 79 transitions, 637 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 20:02:20,592 INFO L231 Difference]: Finished difference. Result has 74 places, 63 transitions, 453 flow [2024-06-21 20:02:20,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=453, PETRI_PLACES=74, PETRI_TRANSITIONS=63} [2024-06-21 20:02:20,593 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 36 predicate places. [2024-06-21 20:02:20,593 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 63 transitions, 453 flow [2024-06-21 20:02:20,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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) [2024-06-21 20:02:20,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:20,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:20,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:02:20,594 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:20,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:20,595 INFO L85 PathProgramCache]: Analyzing trace with hash 518192841, now seen corresponding path program 1 times [2024-06-21 20:02:20,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:20,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147752448] [2024-06-21 20:02:20,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:20,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:20,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:20,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:20,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:20,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147752448] [2024-06-21 20:02:20,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147752448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:20,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:20,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:20,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653085979] [2024-06-21 20:02:20,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:20,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:20,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:20,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:20,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:20,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:20,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 63 transitions, 453 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 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) [2024-06-21 20:02:20,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:20,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:20,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:20,794 INFO L124 PetriNetUnfolderBase]: 259/605 cut-off events. [2024-06-21 20:02:20,794 INFO L125 PetriNetUnfolderBase]: For 3124/3147 co-relation queries the response was YES. [2024-06-21 20:02:20,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2125 conditions, 605 events. 259/605 cut-off events. For 3124/3147 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3207 event pairs, 59 based on Foata normal form. 18/615 useless extension candidates. Maximal degree in co-relation 1616. Up to 180 conditions per place. [2024-06-21 20:02:20,798 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 40 selfloop transitions, 26 changer transitions 1/81 dead transitions. [2024-06-21 20:02:20,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 81 transitions, 693 flow [2024-06-21 20:02:20,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:20,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:20,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-21 20:02:20,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6531531531531531 [2024-06-21 20:02:20,801 INFO L175 Difference]: Start difference. First operand has 74 places, 63 transitions, 453 flow. Second operand 6 states and 145 transitions. [2024-06-21 20:02:20,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 81 transitions, 693 flow [2024-06-21 20:02:20,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 81 transitions, 640 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 20:02:20,806 INFO L231 Difference]: Finished difference. Result has 77 places, 65 transitions, 492 flow [2024-06-21 20:02:20,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=492, PETRI_PLACES=77, PETRI_TRANSITIONS=65} [2024-06-21 20:02:20,807 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 39 predicate places. [2024-06-21 20:02:20,807 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 65 transitions, 492 flow [2024-06-21 20:02:20,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 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) [2024-06-21 20:02:20,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:20,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:20,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:02:20,808 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:20,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:20,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1786374409, now seen corresponding path program 2 times [2024-06-21 20:02:20,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:20,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501013952] [2024-06-21 20:02:20,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:20,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:20,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:20,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:20,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:20,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501013952] [2024-06-21 20:02:20,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501013952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:20,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:20,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:20,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162647457] [2024-06-21 20:02:20,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:20,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:20,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:20,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:20,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:20,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:20,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 65 transitions, 492 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 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) [2024-06-21 20:02:20,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:20,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:20,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:20,984 INFO L124 PetriNetUnfolderBase]: 262/621 cut-off events. [2024-06-21 20:02:20,985 INFO L125 PetriNetUnfolderBase]: For 3555/3576 co-relation queries the response was YES. [2024-06-21 20:02:20,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2207 conditions, 621 events. 262/621 cut-off events. For 3555/3576 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3319 event pairs, 54 based on Foata normal form. 10/627 useless extension candidates. Maximal degree in co-relation 1567. Up to 158 conditions per place. [2024-06-21 20:02:20,989 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 43 selfloop transitions, 23 changer transitions 2/82 dead transitions. [2024-06-21 20:02:20,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 741 flow [2024-06-21 20:02:20,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:20,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:20,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-21 20:02:20,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6486486486486487 [2024-06-21 20:02:20,991 INFO L175 Difference]: Start difference. First operand has 77 places, 65 transitions, 492 flow. Second operand 6 states and 144 transitions. [2024-06-21 20:02:20,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 741 flow [2024-06-21 20:02:20,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 82 transitions, 673 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 20:02:20,998 INFO L231 Difference]: Finished difference. Result has 79 places, 68 transitions, 518 flow [2024-06-21 20:02:20,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=518, PETRI_PLACES=79, PETRI_TRANSITIONS=68} [2024-06-21 20:02:20,998 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 41 predicate places. [2024-06-21 20:02:20,999 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 68 transitions, 518 flow [2024-06-21 20:02:20,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 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) [2024-06-21 20:02:20,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:20,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:20,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:02:20,999 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:21,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:21,000 INFO L85 PathProgramCache]: Analyzing trace with hash -691718796, now seen corresponding path program 1 times [2024-06-21 20:02:21,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:21,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782513425] [2024-06-21 20:02:21,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:21,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:21,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:21,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:21,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:21,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782513425] [2024-06-21 20:02:21,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782513425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:21,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:21,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:21,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154473911] [2024-06-21 20:02:21,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:21,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:21,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:21,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:21,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:21,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:21,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 68 transitions, 518 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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) [2024-06-21 20:02:21,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:21,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:21,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:21,183 INFO L124 PetriNetUnfolderBase]: 285/680 cut-off events. [2024-06-21 20:02:21,183 INFO L125 PetriNetUnfolderBase]: For 4384/4415 co-relation queries the response was YES. [2024-06-21 20:02:21,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2444 conditions, 680 events. 285/680 cut-off events. For 4384/4415 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3837 event pairs, 83 based on Foata normal form. 15/691 useless extension candidates. Maximal degree in co-relation 1904. Up to 213 conditions per place. [2024-06-21 20:02:21,189 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 54 selfloop transitions, 21 changer transitions 2/91 dead transitions. [2024-06-21 20:02:21,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 91 transitions, 831 flow [2024-06-21 20:02:21,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:21,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:21,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-21 20:02:21,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6396396396396397 [2024-06-21 20:02:21,191 INFO L175 Difference]: Start difference. First operand has 79 places, 68 transitions, 518 flow. Second operand 6 states and 142 transitions. [2024-06-21 20:02:21,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 91 transitions, 831 flow [2024-06-21 20:02:21,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 91 transitions, 782 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 20:02:21,201 INFO L231 Difference]: Finished difference. Result has 83 places, 73 transitions, 575 flow [2024-06-21 20:02:21,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=575, PETRI_PLACES=83, PETRI_TRANSITIONS=73} [2024-06-21 20:02:21,203 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 45 predicate places. [2024-06-21 20:02:21,203 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 73 transitions, 575 flow [2024-06-21 20:02:21,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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) [2024-06-21 20:02:21,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:21,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:21,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:02:21,204 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:21,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:21,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1818101590, now seen corresponding path program 1 times [2024-06-21 20:02:21,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:21,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416363983] [2024-06-21 20:02:21,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:21,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:21,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:21,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:21,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416363983] [2024-06-21 20:02:21,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416363983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:21,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:21,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:02:21,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457406686] [2024-06-21 20:02:21,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:21,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:21,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:21,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:21,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:21,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:21,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 73 transitions, 575 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 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) [2024-06-21 20:02:21,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:21,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:21,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:21,443 INFO L124 PetriNetUnfolderBase]: 306/734 cut-off events. [2024-06-21 20:02:21,444 INFO L125 PetriNetUnfolderBase]: For 5537/5569 co-relation queries the response was YES. [2024-06-21 20:02:21,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2728 conditions, 734 events. 306/734 cut-off events. For 5537/5569 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4256 event pairs, 39 based on Foata normal form. 20/747 useless extension candidates. Maximal degree in co-relation 2543. Up to 211 conditions per place. [2024-06-21 20:02:21,448 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 60 selfloop transitions, 22 changer transitions 2/98 dead transitions. [2024-06-21 20:02:21,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 98 transitions, 908 flow [2024-06-21 20:02:21,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:21,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:21,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 20:02:21,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6576576576576577 [2024-06-21 20:02:21,450 INFO L175 Difference]: Start difference. First operand has 83 places, 73 transitions, 575 flow. Second operand 6 states and 146 transitions. [2024-06-21 20:02:21,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 98 transitions, 908 flow [2024-06-21 20:02:21,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 98 transitions, 877 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-21 20:02:21,457 INFO L231 Difference]: Finished difference. Result has 91 places, 76 transitions, 657 flow [2024-06-21 20:02:21,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=657, PETRI_PLACES=91, PETRI_TRANSITIONS=76} [2024-06-21 20:02:21,458 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 53 predicate places. [2024-06-21 20:02:21,458 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 76 transitions, 657 flow [2024-06-21 20:02:21,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 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) [2024-06-21 20:02:21,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:21,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:21,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:02:21,459 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:21,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:21,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1567078477, now seen corresponding path program 1 times [2024-06-21 20:02:21,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:21,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225606825] [2024-06-21 20:02:21,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:21,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:21,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:21,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:21,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225606825] [2024-06-21 20:02:21,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225606825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:21,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:21,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:02:21,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818333925] [2024-06-21 20:02:21,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:21,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:21,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:21,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:21,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:21,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-06-21 20:02:21,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 76 transitions, 657 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 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) [2024-06-21 20:02:21,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:21,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-06-21 20:02:21,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:21,729 INFO L124 PetriNetUnfolderBase]: 521/1094 cut-off events. [2024-06-21 20:02:21,729 INFO L125 PetriNetUnfolderBase]: For 5839/5845 co-relation queries the response was YES. [2024-06-21 20:02:21,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3829 conditions, 1094 events. 521/1094 cut-off events. For 5839/5845 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6476 event pairs, 153 based on Foata normal form. 34/1104 useless extension candidates. Maximal degree in co-relation 3275. Up to 355 conditions per place. [2024-06-21 20:02:21,737 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 61 selfloop transitions, 41 changer transitions 4/124 dead transitions. [2024-06-21 20:02:21,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 124 transitions, 1070 flow [2024-06-21 20:02:21,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:02:21,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:02:21,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-21 20:02:21,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6081081081081081 [2024-06-21 20:02:21,738 INFO L175 Difference]: Start difference. First operand has 91 places, 76 transitions, 657 flow. Second operand 10 states and 225 transitions. [2024-06-21 20:02:21,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 124 transitions, 1070 flow [2024-06-21 20:02:21,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 124 transitions, 990 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 20:02:21,754 INFO L231 Difference]: Finished difference. Result has 104 places, 91 transitions, 867 flow [2024-06-21 20:02:21,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=867, PETRI_PLACES=104, PETRI_TRANSITIONS=91} [2024-06-21 20:02:21,755 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 66 predicate places. [2024-06-21 20:02:21,756 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 91 transitions, 867 flow [2024-06-21 20:02:21,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 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) [2024-06-21 20:02:21,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:21,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:21,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:02:21,756 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:21,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:21,757 INFO L85 PathProgramCache]: Analyzing trace with hash -984590181, now seen corresponding path program 2 times [2024-06-21 20:02:21,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:21,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187515578] [2024-06-21 20:02:21,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:21,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:21,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:21,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:21,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:21,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187515578] [2024-06-21 20:02:21,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187515578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:21,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:21,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:21,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690010895] [2024-06-21 20:02:21,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:21,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:21,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:21,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:21,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:21,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:21,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 91 transitions, 867 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 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) [2024-06-21 20:02:21,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:21,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:21,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:21,983 INFO L124 PetriNetUnfolderBase]: 407/952 cut-off events. [2024-06-21 20:02:21,983 INFO L125 PetriNetUnfolderBase]: For 9421/9479 co-relation queries the response was YES. [2024-06-21 20:02:21,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4317 conditions, 952 events. 407/952 cut-off events. For 9421/9479 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5945 event pairs, 104 based on Foata normal form. 17/952 useless extension candidates. Maximal degree in co-relation 3390. Up to 256 conditions per place. [2024-06-21 20:02:21,991 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 55 selfloop transitions, 32 changer transitions 0/110 dead transitions. [2024-06-21 20:02:21,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 110 transitions, 1240 flow [2024-06-21 20:02:21,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:21,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:21,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-21 20:02:21,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6216216216216216 [2024-06-21 20:02:21,993 INFO L175 Difference]: Start difference. First operand has 104 places, 91 transitions, 867 flow. Second operand 6 states and 138 transitions. [2024-06-21 20:02:21,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 110 transitions, 1240 flow [2024-06-21 20:02:22,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 110 transitions, 1240 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-21 20:02:22,008 INFO L231 Difference]: Finished difference. Result has 110 places, 96 transitions, 987 flow [2024-06-21 20:02:22,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=987, PETRI_PLACES=110, PETRI_TRANSITIONS=96} [2024-06-21 20:02:22,009 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 72 predicate places. [2024-06-21 20:02:22,009 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 96 transitions, 987 flow [2024-06-21 20:02:22,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 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) [2024-06-21 20:02:22,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:22,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:22,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:02:22,010 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:22,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:22,010 INFO L85 PathProgramCache]: Analyzing trace with hash 189380091, now seen corresponding path program 3 times [2024-06-21 20:02:22,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:22,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266406872] [2024-06-21 20:02:22,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:22,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:22,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:22,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:22,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266406872] [2024-06-21 20:02:22,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266406872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:22,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:22,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:22,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242426226] [2024-06-21 20:02:22,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:22,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:22,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:22,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:22,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:22,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:22,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 96 transitions, 987 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 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) [2024-06-21 20:02:22,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:22,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:22,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:22,221 INFO L124 PetriNetUnfolderBase]: 405/949 cut-off events. [2024-06-21 20:02:22,222 INFO L125 PetriNetUnfolderBase]: For 10559/10617 co-relation queries the response was YES. [2024-06-21 20:02:22,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4486 conditions, 949 events. 405/949 cut-off events. For 10559/10617 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5898 event pairs, 99 based on Foata normal form. 13/945 useless extension candidates. Maximal degree in co-relation 3526. Up to 255 conditions per place. [2024-06-21 20:02:22,230 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 54 selfloop transitions, 34 changer transitions 0/111 dead transitions. [2024-06-21 20:02:22,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 111 transitions, 1328 flow [2024-06-21 20:02:22,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:22,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:22,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-21 20:02:22,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6216216216216216 [2024-06-21 20:02:22,231 INFO L175 Difference]: Start difference. First operand has 110 places, 96 transitions, 987 flow. Second operand 6 states and 138 transitions. [2024-06-21 20:02:22,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 111 transitions, 1328 flow [2024-06-21 20:02:22,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 111 transitions, 1284 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 20:02:22,252 INFO L231 Difference]: Finished difference. Result has 115 places, 97 transitions, 1054 flow [2024-06-21 20:02:22,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=943, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1054, PETRI_PLACES=115, PETRI_TRANSITIONS=97} [2024-06-21 20:02:22,253 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 77 predicate places. [2024-06-21 20:02:22,253 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 97 transitions, 1054 flow [2024-06-21 20:02:22,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 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) [2024-06-21 20:02:22,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:22,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:22,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:02:22,254 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:22,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:22,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1360345992, now seen corresponding path program 1 times [2024-06-21 20:02:22,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:22,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206255329] [2024-06-21 20:02:22,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:22,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:22,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:22,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:22,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:22,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206255329] [2024-06-21 20:02:22,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206255329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:22,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:22,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:22,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728459605] [2024-06-21 20:02:22,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:22,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:22,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:22,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:22,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:22,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:22,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 97 transitions, 1054 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2024-06-21 20:02:22,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:22,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:22,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:22,473 INFO L124 PetriNetUnfolderBase]: 401/934 cut-off events. [2024-06-21 20:02:22,474 INFO L125 PetriNetUnfolderBase]: For 12339/12409 co-relation queries the response was YES. [2024-06-21 20:02:22,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4574 conditions, 934 events. 401/934 cut-off events. For 12339/12409 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5761 event pairs, 81 based on Foata normal form. 26/937 useless extension candidates. Maximal degree in co-relation 3983. Up to 253 conditions per place. [2024-06-21 20:02:22,481 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 67 selfloop transitions, 37 changer transitions 0/127 dead transitions. [2024-06-21 20:02:22,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 127 transitions, 1501 flow [2024-06-21 20:02:22,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:22,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:22,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 20:02:22,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6846846846846847 [2024-06-21 20:02:22,483 INFO L175 Difference]: Start difference. First operand has 115 places, 97 transitions, 1054 flow. Second operand 6 states and 152 transitions. [2024-06-21 20:02:22,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 127 transitions, 1501 flow [2024-06-21 20:02:22,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 127 transitions, 1454 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 20:02:22,505 INFO L231 Difference]: Finished difference. Result has 121 places, 103 transitions, 1212 flow [2024-06-21 20:02:22,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1014, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1212, PETRI_PLACES=121, PETRI_TRANSITIONS=103} [2024-06-21 20:02:22,505 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 83 predicate places. [2024-06-21 20:02:22,505 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 103 transitions, 1212 flow [2024-06-21 20:02:22,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2024-06-21 20:02:22,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:22,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:22,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:02:22,506 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:22,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:22,507 INFO L85 PathProgramCache]: Analyzing trace with hash 757279282, now seen corresponding path program 2 times [2024-06-21 20:02:22,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:22,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831436345] [2024-06-21 20:02:22,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:22,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:22,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:22,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:22,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831436345] [2024-06-21 20:02:22,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831436345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:22,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:22,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:22,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977822722] [2024-06-21 20:02:22,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:22,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:22,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:22,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:22,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:22,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:22,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 103 transitions, 1212 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2024-06-21 20:02:22,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:22,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:22,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:22,712 INFO L124 PetriNetUnfolderBase]: 406/937 cut-off events. [2024-06-21 20:02:22,712 INFO L125 PetriNetUnfolderBase]: For 14444/14538 co-relation queries the response was YES. [2024-06-21 20:02:22,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4916 conditions, 937 events. 406/937 cut-off events. For 14444/14538 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5751 event pairs, 86 based on Foata normal form. 36/948 useless extension candidates. Maximal degree in co-relation 4340. Up to 259 conditions per place. [2024-06-21 20:02:22,720 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 69 selfloop transitions, 33 changer transitions 0/125 dead transitions. [2024-06-21 20:02:22,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 125 transitions, 1579 flow [2024-06-21 20:02:22,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:22,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:22,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 20:02:22,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6576576576576577 [2024-06-21 20:02:22,721 INFO L175 Difference]: Start difference. First operand has 121 places, 103 transitions, 1212 flow. Second operand 6 states and 146 transitions. [2024-06-21 20:02:22,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 125 transitions, 1579 flow [2024-06-21 20:02:22,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 125 transitions, 1493 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 20:02:22,744 INFO L231 Difference]: Finished difference. Result has 124 places, 106 transitions, 1252 flow [2024-06-21 20:02:22,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1252, PETRI_PLACES=124, PETRI_TRANSITIONS=106} [2024-06-21 20:02:22,745 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 86 predicate places. [2024-06-21 20:02:22,745 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 106 transitions, 1252 flow [2024-06-21 20:02:22,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2024-06-21 20:02:22,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:22,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:22,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:02:22,746 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:22,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:22,746 INFO L85 PathProgramCache]: Analyzing trace with hash 384132592, now seen corresponding path program 3 times [2024-06-21 20:02:22,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:22,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880739140] [2024-06-21 20:02:22,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:22,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:22,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:22,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:22,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:22,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880739140] [2024-06-21 20:02:22,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880739140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:22,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:22,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:02:22,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189401220] [2024-06-21 20:02:22,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:22,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:22,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:22,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:22,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:22,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-06-21 20:02:22,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 106 transitions, 1252 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 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) [2024-06-21 20:02:22,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:22,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-06-21 20:02:22,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:22,989 INFO L124 PetriNetUnfolderBase]: 548/1180 cut-off events. [2024-06-21 20:02:22,989 INFO L125 PetriNetUnfolderBase]: For 13277/13373 co-relation queries the response was YES. [2024-06-21 20:02:22,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5618 conditions, 1180 events. 548/1180 cut-off events. For 13277/13373 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7368 event pairs, 106 based on Foata normal form. 17/1135 useless extension candidates. Maximal degree in co-relation 5383. Up to 458 conditions per place. [2024-06-21 20:02:22,999 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 66 selfloop transitions, 40 changer transitions 0/147 dead transitions. [2024-06-21 20:02:22,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 147 transitions, 1672 flow [2024-06-21 20:02:23,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:02:23,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:02:23,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-21 20:02:23,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 20:02:23,001 INFO L175 Difference]: Start difference. First operand has 124 places, 106 transitions, 1252 flow. Second operand 8 states and 185 transitions. [2024-06-21 20:02:23,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 147 transitions, 1672 flow [2024-06-21 20:02:23,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 147 transitions, 1614 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 20:02:23,030 INFO L231 Difference]: Finished difference. Result has 133 places, 121 transitions, 1432 flow [2024-06-21 20:02:23,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1204, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1432, PETRI_PLACES=133, PETRI_TRANSITIONS=121} [2024-06-21 20:02:23,031 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 95 predicate places. [2024-06-21 20:02:23,031 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 121 transitions, 1432 flow [2024-06-21 20:02:23,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 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) [2024-06-21 20:02:23,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:23,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:23,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:02:23,032 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:23,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:23,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1800666786, now seen corresponding path program 4 times [2024-06-21 20:02:23,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:23,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193323961] [2024-06-21 20:02:23,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:23,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:23,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:23,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:23,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193323961] [2024-06-21 20:02:23,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193323961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:23,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:23,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:23,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879101687] [2024-06-21 20:02:23,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:23,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:23,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:23,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:23,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:23,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:23,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 121 transitions, 1432 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2024-06-21 20:02:23,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:23,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:23,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:23,265 INFO L124 PetriNetUnfolderBase]: 450/1045 cut-off events. [2024-06-21 20:02:23,265 INFO L125 PetriNetUnfolderBase]: For 15902/15994 co-relation queries the response was YES. [2024-06-21 20:02:23,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5538 conditions, 1045 events. 450/1045 cut-off events. For 15902/15994 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6711 event pairs, 132 based on Foata normal form. 20/1039 useless extension candidates. Maximal degree in co-relation 5136. Up to 372 conditions per place. [2024-06-21 20:02:23,279 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 68 selfloop transitions, 34 changer transitions 0/134 dead transitions. [2024-06-21 20:02:23,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 134 transitions, 1711 flow [2024-06-21 20:02:23,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:23,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:23,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-21 20:02:23,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6216216216216216 [2024-06-21 20:02:23,281 INFO L175 Difference]: Start difference. First operand has 133 places, 121 transitions, 1432 flow. Second operand 6 states and 138 transitions. [2024-06-21 20:02:23,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 134 transitions, 1711 flow [2024-06-21 20:02:23,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 134 transitions, 1711 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-21 20:02:23,311 INFO L231 Difference]: Finished difference. Result has 140 places, 122 transitions, 1530 flow [2024-06-21 20:02:23,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1432, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1530, PETRI_PLACES=140, PETRI_TRANSITIONS=122} [2024-06-21 20:02:23,312 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 102 predicate places. [2024-06-21 20:02:23,312 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 122 transitions, 1530 flow [2024-06-21 20:02:23,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2024-06-21 20:02:23,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:23,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:23,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:02:23,313 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:23,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:23,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1196624734, now seen corresponding path program 5 times [2024-06-21 20:02:23,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:23,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778993013] [2024-06-21 20:02:23,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:23,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:23,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:23,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:23,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:23,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778993013] [2024-06-21 20:02:23,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778993013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:23,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:23,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:02:23,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725494583] [2024-06-21 20:02:23,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:23,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:23,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:23,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:23,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:23,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-06-21 20:02:23,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 122 transitions, 1530 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 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) [2024-06-21 20:02:23,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:23,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-06-21 20:02:23,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:23,550 INFO L124 PetriNetUnfolderBase]: 464/1063 cut-off events. [2024-06-21 20:02:23,551 INFO L125 PetriNetUnfolderBase]: For 10080/10107 co-relation queries the response was YES. [2024-06-21 20:02:23,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4964 conditions, 1063 events. 464/1063 cut-off events. For 10080/10107 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6627 event pairs, 112 based on Foata normal form. 38/1079 useless extension candidates. Maximal degree in co-relation 4535. Up to 247 conditions per place. [2024-06-21 20:02:23,558 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 69 selfloop transitions, 45 changer transitions 0/149 dead transitions. [2024-06-21 20:02:23,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 149 transitions, 1817 flow [2024-06-21 20:02:23,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:02:23,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:02:23,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-21 20:02:23,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5837837837837838 [2024-06-21 20:02:23,562 INFO L175 Difference]: Start difference. First operand has 140 places, 122 transitions, 1530 flow. Second operand 10 states and 216 transitions. [2024-06-21 20:02:23,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 149 transitions, 1817 flow [2024-06-21 20:02:23,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 149 transitions, 1705 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 20:02:23,595 INFO L231 Difference]: Finished difference. Result has 151 places, 123 transitions, 1555 flow [2024-06-21 20:02:23,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1237, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1555, PETRI_PLACES=151, PETRI_TRANSITIONS=123} [2024-06-21 20:02:23,595 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 113 predicate places. [2024-06-21 20:02:23,596 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 123 transitions, 1555 flow [2024-06-21 20:02:23,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 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) [2024-06-21 20:02:23,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:23,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:23,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:02:23,596 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:23,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:23,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1648641746, now seen corresponding path program 1 times [2024-06-21 20:02:23,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:23,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173890629] [2024-06-21 20:02:23,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:23,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:23,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:23,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173890629] [2024-06-21 20:02:23,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173890629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:23,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:23,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:23,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429993034] [2024-06-21 20:02:23,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:23,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:23,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:23,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:23,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:23,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:23,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 123 transitions, 1555 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2024-06-21 20:02:23,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:23,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:23,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:23,822 INFO L124 PetriNetUnfolderBase]: 367/943 cut-off events. [2024-06-21 20:02:23,822 INFO L125 PetriNetUnfolderBase]: For 13724/13768 co-relation queries the response was YES. [2024-06-21 20:02:23,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4979 conditions, 943 events. 367/943 cut-off events. For 13724/13768 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6261 event pairs, 122 based on Foata normal form. 14/942 useless extension candidates. Maximal degree in co-relation 4558. Up to 269 conditions per place. [2024-06-21 20:02:23,831 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 64 selfloop transitions, 33 changer transitions 0/136 dead transitions. [2024-06-21 20:02:23,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 136 transitions, 1847 flow [2024-06-21 20:02:23,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:23,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:23,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-21 20:02:23,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036036036036037 [2024-06-21 20:02:23,832 INFO L175 Difference]: Start difference. First operand has 151 places, 123 transitions, 1555 flow. Second operand 6 states and 134 transitions. [2024-06-21 20:02:23,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 136 transitions, 1847 flow [2024-06-21 20:02:23,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 136 transitions, 1790 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 20:02:23,872 INFO L231 Difference]: Finished difference. Result has 155 places, 126 transitions, 1606 flow [2024-06-21 20:02:23,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1501, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1606, PETRI_PLACES=155, PETRI_TRANSITIONS=126} [2024-06-21 20:02:23,872 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 117 predicate places. [2024-06-21 20:02:23,873 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 126 transitions, 1606 flow [2024-06-21 20:02:23,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2024-06-21 20:02:23,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:23,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:23,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:02:23,874 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:23,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:23,874 INFO L85 PathProgramCache]: Analyzing trace with hash 742248786, now seen corresponding path program 2 times [2024-06-21 20:02:23,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:23,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302531823] [2024-06-21 20:02:23,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:23,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:23,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:23,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:23,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:23,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302531823] [2024-06-21 20:02:23,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302531823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:23,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:23,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:23,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172782503] [2024-06-21 20:02:23,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:23,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:23,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:23,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:23,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:23,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:23,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 126 transitions, 1606 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2024-06-21 20:02:23,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:23,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:23,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:24,080 INFO L124 PetriNetUnfolderBase]: 373/950 cut-off events. [2024-06-21 20:02:24,081 INFO L125 PetriNetUnfolderBase]: For 14705/14757 co-relation queries the response was YES. [2024-06-21 20:02:24,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5085 conditions, 950 events. 373/950 cut-off events. For 14705/14757 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6269 event pairs, 121 based on Foata normal form. 19/949 useless extension candidates. Maximal degree in co-relation 4676. Up to 270 conditions per place. [2024-06-21 20:02:24,089 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 59 selfloop transitions, 39 changer transitions 0/137 dead transitions. [2024-06-21 20:02:24,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 137 transitions, 1939 flow [2024-06-21 20:02:24,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:24,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:24,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-21 20:02:24,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6081081081081081 [2024-06-21 20:02:24,090 INFO L175 Difference]: Start difference. First operand has 155 places, 126 transitions, 1606 flow. Second operand 6 states and 135 transitions. [2024-06-21 20:02:24,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 137 transitions, 1939 flow [2024-06-21 20:02:24,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 137 transitions, 1890 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 20:02:24,134 INFO L231 Difference]: Finished difference. Result has 158 places, 129 transitions, 1674 flow [2024-06-21 20:02:24,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1557, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1674, PETRI_PLACES=158, PETRI_TRANSITIONS=129} [2024-06-21 20:02:24,135 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 120 predicate places. [2024-06-21 20:02:24,135 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 129 transitions, 1674 flow [2024-06-21 20:02:24,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2024-06-21 20:02:24,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:24,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:24,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:02:24,136 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:24,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:24,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1760819332, now seen corresponding path program 3 times [2024-06-21 20:02:24,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:24,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489807912] [2024-06-21 20:02:24,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:24,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:24,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:24,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:24,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489807912] [2024-06-21 20:02:24,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489807912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:24,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:24,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:24,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509222588] [2024-06-21 20:02:24,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:24,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:24,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:24,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:24,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:24,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:24,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 129 transitions, 1674 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2024-06-21 20:02:24,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:24,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:24,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:24,342 INFO L124 PetriNetUnfolderBase]: 377/956 cut-off events. [2024-06-21 20:02:24,343 INFO L125 PetriNetUnfolderBase]: For 15885/15933 co-relation queries the response was YES. [2024-06-21 20:02:24,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5220 conditions, 956 events. 377/956 cut-off events. For 15885/15933 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6298 event pairs, 121 based on Foata normal form. 17/953 useless extension candidates. Maximal degree in co-relation 4812. Up to 278 conditions per place. [2024-06-21 20:02:24,351 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 68 selfloop transitions, 33 changer transitions 0/140 dead transitions. [2024-06-21 20:02:24,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 140 transitions, 2023 flow [2024-06-21 20:02:24,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:24,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:24,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-21 20:02:24,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036036036036037 [2024-06-21 20:02:24,352 INFO L175 Difference]: Start difference. First operand has 158 places, 129 transitions, 1674 flow. Second operand 6 states and 134 transitions. [2024-06-21 20:02:24,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 140 transitions, 2023 flow [2024-06-21 20:02:24,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 140 transitions, 1968 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-21 20:02:24,397 INFO L231 Difference]: Finished difference. Result has 162 places, 132 transitions, 1730 flow [2024-06-21 20:02:24,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1622, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1730, PETRI_PLACES=162, PETRI_TRANSITIONS=132} [2024-06-21 20:02:24,397 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 124 predicate places. [2024-06-21 20:02:24,397 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 132 transitions, 1730 flow [2024-06-21 20:02:24,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2024-06-21 20:02:24,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:24,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:24,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:02:24,398 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:24,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:24,399 INFO L85 PathProgramCache]: Analyzing trace with hash 334736203, now seen corresponding path program 1 times [2024-06-21 20:02:24,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:24,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509713789] [2024-06-21 20:02:24,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:24,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:24,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:24,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:24,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509713789] [2024-06-21 20:02:24,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509713789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:24,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:24,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:02:24,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024149161] [2024-06-21 20:02:24,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:24,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:24,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:24,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:24,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:24,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-06-21 20:02:24,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 132 transitions, 1730 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 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) [2024-06-21 20:02:24,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:24,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-06-21 20:02:24,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:24,638 INFO L124 PetriNetUnfolderBase]: 535/1193 cut-off events. [2024-06-21 20:02:24,639 INFO L125 PetriNetUnfolderBase]: For 13548/13577 co-relation queries the response was YES. [2024-06-21 20:02:24,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5967 conditions, 1193 events. 535/1193 cut-off events. For 13548/13577 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7644 event pairs, 124 based on Foata normal form. 10/1177 useless extension candidates. Maximal degree in co-relation 5694. Up to 437 conditions per place. [2024-06-21 20:02:24,649 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 71 selfloop transitions, 51 changer transitions 0/172 dead transitions. [2024-06-21 20:02:24,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 172 transitions, 2186 flow [2024-06-21 20:02:24,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:02:24,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:02:24,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-21 20:02:24,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6182432432432432 [2024-06-21 20:02:24,650 INFO L175 Difference]: Start difference. First operand has 162 places, 132 transitions, 1730 flow. Second operand 8 states and 183 transitions. [2024-06-21 20:02:24,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 172 transitions, 2186 flow [2024-06-21 20:02:24,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 172 transitions, 2124 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 20:02:24,701 INFO L231 Difference]: Finished difference. Result has 172 places, 144 transitions, 1986 flow [2024-06-21 20:02:24,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1669, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1986, PETRI_PLACES=172, PETRI_TRANSITIONS=144} [2024-06-21 20:02:24,702 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 134 predicate places. [2024-06-21 20:02:24,702 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 144 transitions, 1986 flow [2024-06-21 20:02:24,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 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) [2024-06-21 20:02:24,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:24,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:24,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:02:24,703 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:24,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:24,703 INFO L85 PathProgramCache]: Analyzing trace with hash -457523133, now seen corresponding path program 2 times [2024-06-21 20:02:24,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:24,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062864024] [2024-06-21 20:02:24,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:24,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:24,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:24,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:24,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062864024] [2024-06-21 20:02:24,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062864024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:24,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:24,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:24,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478984301] [2024-06-21 20:02:24,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:24,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:24,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:24,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:24,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:24,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:24,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 144 transitions, 1986 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2024-06-21 20:02:24,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:24,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:24,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:24,915 INFO L124 PetriNetUnfolderBase]: 391/985 cut-off events. [2024-06-21 20:02:24,915 INFO L125 PetriNetUnfolderBase]: For 19545/19591 co-relation queries the response was YES. [2024-06-21 20:02:24,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5843 conditions, 985 events. 391/985 cut-off events. For 19545/19591 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6512 event pairs, 89 based on Foata normal form. 8/970 useless extension candidates. Maximal degree in co-relation 5551. Up to 287 conditions per place. [2024-06-21 20:02:24,924 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 71 selfloop transitions, 41 changer transitions 0/161 dead transitions. [2024-06-21 20:02:24,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 161 transitions, 2351 flow [2024-06-21 20:02:24,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:24,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:24,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-21 20:02:24,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6441441441441441 [2024-06-21 20:02:24,925 INFO L175 Difference]: Start difference. First operand has 172 places, 144 transitions, 1986 flow. Second operand 6 states and 143 transitions. [2024-06-21 20:02:24,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 161 transitions, 2351 flow [2024-06-21 20:02:24,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 161 transitions, 2317 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-21 20:02:24,981 INFO L231 Difference]: Finished difference. Result has 177 places, 145 transitions, 2055 flow [2024-06-21 20:02:24,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1953, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2055, PETRI_PLACES=177, PETRI_TRANSITIONS=145} [2024-06-21 20:02:24,982 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 139 predicate places. [2024-06-21 20:02:24,982 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 145 transitions, 2055 flow [2024-06-21 20:02:24,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2024-06-21 20:02:24,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:24,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:24,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:02:24,983 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:24,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:24,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1996811943, now seen corresponding path program 3 times [2024-06-21 20:02:24,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:24,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901197293] [2024-06-21 20:02:24,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:24,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:24,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:25,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:25,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:25,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901197293] [2024-06-21 20:02:25,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901197293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:25,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:25,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:25,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951554564] [2024-06-21 20:02:25,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:25,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:25,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:25,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:25,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:25,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:25,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 145 transitions, 2055 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2024-06-21 20:02:25,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:25,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:25,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:25,198 INFO L124 PetriNetUnfolderBase]: 397/997 cut-off events. [2024-06-21 20:02:25,198 INFO L125 PetriNetUnfolderBase]: For 21132/21180 co-relation queries the response was YES. [2024-06-21 20:02:25,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6022 conditions, 997 events. 397/997 cut-off events. For 21132/21180 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6594 event pairs, 67 based on Foata normal form. 10/984 useless extension candidates. Maximal degree in co-relation 5607. Up to 291 conditions per place. [2024-06-21 20:02:25,207 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 67 selfloop transitions, 45 changer transitions 0/161 dead transitions. [2024-06-21 20:02:25,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 161 transitions, 2467 flow [2024-06-21 20:02:25,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:25,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:25,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-21 20:02:25,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306306306306306 [2024-06-21 20:02:25,208 INFO L175 Difference]: Start difference. First operand has 177 places, 145 transitions, 2055 flow. Second operand 6 states and 140 transitions. [2024-06-21 20:02:25,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 161 transitions, 2467 flow [2024-06-21 20:02:25,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 161 transitions, 2403 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 20:02:25,295 INFO L231 Difference]: Finished difference. Result has 180 places, 146 transitions, 2103 flow [2024-06-21 20:02:25,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1992, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2103, PETRI_PLACES=180, PETRI_TRANSITIONS=146} [2024-06-21 20:02:25,296 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 142 predicate places. [2024-06-21 20:02:25,296 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 146 transitions, 2103 flow [2024-06-21 20:02:25,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2024-06-21 20:02:25,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:25,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:25,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:02:25,297 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:25,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:25,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1996902153, now seen corresponding path program 4 times [2024-06-21 20:02:25,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:25,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762715211] [2024-06-21 20:02:25,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:25,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:25,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:25,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:25,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:25,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762715211] [2024-06-21 20:02:25,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762715211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:25,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:25,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:25,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649719438] [2024-06-21 20:02:25,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:25,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:25,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:25,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:25,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:25,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:25,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 146 transitions, 2103 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2024-06-21 20:02:25,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:25,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:25,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:25,520 INFO L124 PetriNetUnfolderBase]: 394/992 cut-off events. [2024-06-21 20:02:25,520 INFO L125 PetriNetUnfolderBase]: For 22038/22086 co-relation queries the response was YES. [2024-06-21 20:02:25,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6034 conditions, 992 events. 394/992 cut-off events. For 22038/22086 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6572 event pairs, 64 based on Foata normal form. 10/979 useless extension candidates. Maximal degree in co-relation 5618. Up to 289 conditions per place. [2024-06-21 20:02:25,530 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 69 selfloop transitions, 42 changer transitions 0/160 dead transitions. [2024-06-21 20:02:25,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 160 transitions, 2451 flow [2024-06-21 20:02:25,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:25,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:25,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-21 20:02:25,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6261261261261262 [2024-06-21 20:02:25,531 INFO L175 Difference]: Start difference. First operand has 180 places, 146 transitions, 2103 flow. Second operand 6 states and 139 transitions. [2024-06-21 20:02:25,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 160 transitions, 2451 flow [2024-06-21 20:02:25,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 160 transitions, 2341 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 20:02:25,595 INFO L231 Difference]: Finished difference. Result has 182 places, 146 transitions, 2081 flow [2024-06-21 20:02:25,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1993, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2081, PETRI_PLACES=182, PETRI_TRANSITIONS=146} [2024-06-21 20:02:25,597 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 144 predicate places. [2024-06-21 20:02:25,598 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 146 transitions, 2081 flow [2024-06-21 20:02:25,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2024-06-21 20:02:25,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:25,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:25,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:02:25,598 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:25,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:25,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1996902308, now seen corresponding path program 4 times [2024-06-21 20:02:25,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:25,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785023836] [2024-06-21 20:02:25,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:25,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:25,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:25,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:25,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785023836] [2024-06-21 20:02:25,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785023836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:25,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:25,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:25,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77535699] [2024-06-21 20:02:25,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:25,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:25,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:25,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:25,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:25,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:25,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 146 transitions, 2081 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2024-06-21 20:02:25,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:25,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:25,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:25,804 INFO L124 PetriNetUnfolderBase]: 400/1019 cut-off events. [2024-06-21 20:02:25,804 INFO L125 PetriNetUnfolderBase]: For 22291/22325 co-relation queries the response was YES. [2024-06-21 20:02:25,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6091 conditions, 1019 events. 400/1019 cut-off events. For 22291/22325 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6836 event pairs, 111 based on Foata normal form. 13/1014 useless extension candidates. Maximal degree in co-relation 5613. Up to 285 conditions per place. [2024-06-21 20:02:25,814 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 73 selfloop transitions, 32 changer transitions 0/154 dead transitions. [2024-06-21 20:02:25,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 154 transitions, 2407 flow [2024-06-21 20:02:25,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:25,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:25,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-21 20:02:25,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5900900900900901 [2024-06-21 20:02:25,816 INFO L175 Difference]: Start difference. First operand has 182 places, 146 transitions, 2081 flow. Second operand 6 states and 131 transitions. [2024-06-21 20:02:25,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 154 transitions, 2407 flow [2024-06-21 20:02:25,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 154 transitions, 2281 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 20:02:25,880 INFO L231 Difference]: Finished difference. Result has 182 places, 146 transitions, 2025 flow [2024-06-21 20:02:25,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1955, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2025, PETRI_PLACES=182, PETRI_TRANSITIONS=146} [2024-06-21 20:02:25,880 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 144 predicate places. [2024-06-21 20:02:25,881 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 146 transitions, 2025 flow [2024-06-21 20:02:25,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2024-06-21 20:02:25,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:25,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:25,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:02:25,881 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:25,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:25,882 INFO L85 PathProgramCache]: Analyzing trace with hash 778948428, now seen corresponding path program 1 times [2024-06-21 20:02:25,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:25,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912223779] [2024-06-21 20:02:25,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:25,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:25,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:25,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:25,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912223779] [2024-06-21 20:02:25,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912223779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:25,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:25,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:25,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634896184] [2024-06-21 20:02:25,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:25,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:25,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:25,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:25,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:25,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:25,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 146 transitions, 2025 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2024-06-21 20:02:25,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:25,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:25,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:26,071 INFO L124 PetriNetUnfolderBase]: 399/1022 cut-off events. [2024-06-21 20:02:26,072 INFO L125 PetriNetUnfolderBase]: For 21403/21425 co-relation queries the response was YES. [2024-06-21 20:02:26,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5985 conditions, 1022 events. 399/1022 cut-off events. For 21403/21425 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6864 event pairs, 50 based on Foata normal form. 10/1020 useless extension candidates. Maximal degree in co-relation 5505. Up to 213 conditions per place. [2024-06-21 20:02:26,084 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 80 selfloop transitions, 25 changer transitions 6/160 dead transitions. [2024-06-21 20:02:26,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 160 transitions, 2381 flow [2024-06-21 20:02:26,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:26,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:26,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-21 20:02:26,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6216216216216216 [2024-06-21 20:02:26,085 INFO L175 Difference]: Start difference. First operand has 182 places, 146 transitions, 2025 flow. Second operand 6 states and 138 transitions. [2024-06-21 20:02:26,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 160 transitions, 2381 flow [2024-06-21 20:02:26,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 160 transitions, 2264 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 20:02:26,153 INFO L231 Difference]: Finished difference. Result has 181 places, 142 transitions, 1887 flow [2024-06-21 20:02:26,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1908, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1887, PETRI_PLACES=181, PETRI_TRANSITIONS=142} [2024-06-21 20:02:26,154 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 143 predicate places. [2024-06-21 20:02:26,154 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 142 transitions, 1887 flow [2024-06-21 20:02:26,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2024-06-21 20:02:26,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:26,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:26,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:02:26,155 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:26,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:26,155 INFO L85 PathProgramCache]: Analyzing trace with hash -519933242, now seen corresponding path program 2 times [2024-06-21 20:02:26,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:26,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113350207] [2024-06-21 20:02:26,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:26,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:26,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:26,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:26,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:26,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113350207] [2024-06-21 20:02:26,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113350207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:26,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:26,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:26,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135925351] [2024-06-21 20:02:26,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:26,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:26,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:26,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:26,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:26,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:26,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 142 transitions, 1887 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2024-06-21 20:02:26,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:26,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:26,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:26,390 INFO L124 PetriNetUnfolderBase]: 368/943 cut-off events. [2024-06-21 20:02:26,390 INFO L125 PetriNetUnfolderBase]: For 20991/21010 co-relation queries the response was YES. [2024-06-21 20:02:26,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5520 conditions, 943 events. 368/943 cut-off events. For 20991/21010 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6175 event pairs, 41 based on Foata normal form. 10/940 useless extension candidates. Maximal degree in co-relation 5050. Up to 199 conditions per place. [2024-06-21 20:02:26,401 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 79 selfloop transitions, 24 changer transitions 0/152 dead transitions. [2024-06-21 20:02:26,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 152 transitions, 2221 flow [2024-06-21 20:02:26,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:26,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:26,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-21 20:02:26,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036036036036037 [2024-06-21 20:02:26,402 INFO L175 Difference]: Start difference. First operand has 181 places, 142 transitions, 1887 flow. Second operand 6 states and 134 transitions. [2024-06-21 20:02:26,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 152 transitions, 2221 flow [2024-06-21 20:02:26,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 152 transitions, 2142 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-21 20:02:26,464 INFO L231 Difference]: Finished difference. Result has 176 places, 142 transitions, 1869 flow [2024-06-21 20:02:26,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1816, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1869, PETRI_PLACES=176, PETRI_TRANSITIONS=142} [2024-06-21 20:02:26,466 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 138 predicate places. [2024-06-21 20:02:26,466 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 142 transitions, 1869 flow [2024-06-21 20:02:26,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2024-06-21 20:02:26,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:26,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:26,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:02:26,467 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:26,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:26,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1093900368, now seen corresponding path program 3 times [2024-06-21 20:02:26,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:26,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050038881] [2024-06-21 20:02:26,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:26,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:26,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:26,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:26,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:26,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050038881] [2024-06-21 20:02:26,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050038881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:26,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:26,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:26,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832663690] [2024-06-21 20:02:26,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:26,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:26,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:26,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:26,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:26,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:26,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 142 transitions, 1869 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2024-06-21 20:02:26,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:26,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:26,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:26,649 INFO L124 PetriNetUnfolderBase]: 362/929 cut-off events. [2024-06-21 20:02:26,649 INFO L125 PetriNetUnfolderBase]: For 19007/19023 co-relation queries the response was YES. [2024-06-21 20:02:26,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5226 conditions, 929 events. 362/929 cut-off events. For 19007/19023 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6053 event pairs, 39 based on Foata normal form. 16/933 useless extension candidates. Maximal degree in co-relation 4819. Up to 197 conditions per place. [2024-06-21 20:02:26,657 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 56 selfloop transitions, 47 changer transitions 0/152 dead transitions. [2024-06-21 20:02:26,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 152 transitions, 2147 flow [2024-06-21 20:02:26,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:26,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:26,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-21 20:02:26,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6171171171171171 [2024-06-21 20:02:26,659 INFO L175 Difference]: Start difference. First operand has 176 places, 142 transitions, 1869 flow. Second operand 6 states and 137 transitions. [2024-06-21 20:02:26,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 152 transitions, 2147 flow [2024-06-21 20:02:26,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 152 transitions, 2040 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 20:02:26,708 INFO L231 Difference]: Finished difference. Result has 174 places, 142 transitions, 1865 flow [2024-06-21 20:02:26,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1762, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1865, PETRI_PLACES=174, PETRI_TRANSITIONS=142} [2024-06-21 20:02:26,709 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 136 predicate places. [2024-06-21 20:02:26,709 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 142 transitions, 1865 flow [2024-06-21 20:02:26,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2024-06-21 20:02:26,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:26,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:26,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:02:26,710 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:26,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:26,710 INFO L85 PathProgramCache]: Analyzing trace with hash 431714832, now seen corresponding path program 1 times [2024-06-21 20:02:26,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:26,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004092612] [2024-06-21 20:02:26,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:26,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:26,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:26,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:26,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:26,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004092612] [2024-06-21 20:02:26,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004092612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:26,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:26,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:26,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943029425] [2024-06-21 20:02:26,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:26,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:26,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:26,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:26,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:26,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:26,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 142 transitions, 1865 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2024-06-21 20:02:26,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:26,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:26,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:26,940 INFO L124 PetriNetUnfolderBase]: 372/968 cut-off events. [2024-06-21 20:02:26,940 INFO L125 PetriNetUnfolderBase]: For 20159/20174 co-relation queries the response was YES. [2024-06-21 20:02:26,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5342 conditions, 968 events. 372/968 cut-off events. For 20159/20174 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6474 event pairs, 77 based on Foata normal form. 16/973 useless extension candidates. Maximal degree in co-relation 5111. Up to 196 conditions per place. [2024-06-21 20:02:26,949 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 53 selfloop transitions, 55 changer transitions 0/157 dead transitions. [2024-06-21 20:02:26,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 157 transitions, 2183 flow [2024-06-21 20:02:26,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:26,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:26,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-21 20:02:26,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306306306306306 [2024-06-21 20:02:26,950 INFO L175 Difference]: Start difference. First operand has 174 places, 142 transitions, 1865 flow. Second operand 6 states and 140 transitions. [2024-06-21 20:02:26,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 157 transitions, 2183 flow [2024-06-21 20:02:27,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 157 transitions, 2088 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 20:02:27,003 INFO L231 Difference]: Finished difference. Result has 175 places, 143 transitions, 1907 flow [2024-06-21 20:02:27,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1772, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1907, PETRI_PLACES=175, PETRI_TRANSITIONS=143} [2024-06-21 20:02:27,004 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 137 predicate places. [2024-06-21 20:02:27,004 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 143 transitions, 1907 flow [2024-06-21 20:02:27,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2024-06-21 20:02:27,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:27,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:27,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:02:27,004 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:27,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:27,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1381040956, now seen corresponding path program 2 times [2024-06-21 20:02:27,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:27,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085030402] [2024-06-21 20:02:27,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:27,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:27,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:27,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085030402] [2024-06-21 20:02:27,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085030402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:27,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:27,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:27,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230941868] [2024-06-21 20:02:27,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:27,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:27,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:27,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:27,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:27,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:27,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 143 transitions, 1907 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2024-06-21 20:02:27,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:27,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:27,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:27,209 INFO L124 PetriNetUnfolderBase]: 394/1034 cut-off events. [2024-06-21 20:02:27,209 INFO L125 PetriNetUnfolderBase]: For 22212/22235 co-relation queries the response was YES. [2024-06-21 20:02:27,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5862 conditions, 1034 events. 394/1034 cut-off events. For 22212/22235 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7147 event pairs, 84 based on Foata normal form. 10/1029 useless extension candidates. Maximal degree in co-relation 5625. Up to 278 conditions per place. [2024-06-21 20:02:27,217 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 75 selfloop transitions, 33 changer transitions 0/157 dead transitions. [2024-06-21 20:02:27,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 157 transitions, 2289 flow [2024-06-21 20:02:27,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:27,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:27,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-21 20:02:27,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6081081081081081 [2024-06-21 20:02:27,218 INFO L175 Difference]: Start difference. First operand has 175 places, 143 transitions, 1907 flow. Second operand 6 states and 135 transitions. [2024-06-21 20:02:27,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 157 transitions, 2289 flow [2024-06-21 20:02:27,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 157 transitions, 2182 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 20:02:27,283 INFO L231 Difference]: Finished difference. Result has 178 places, 145 transitions, 1915 flow [2024-06-21 20:02:27,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1800, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1915, PETRI_PLACES=178, PETRI_TRANSITIONS=145} [2024-06-21 20:02:27,283 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 140 predicate places. [2024-06-21 20:02:27,283 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 145 transitions, 1915 flow [2024-06-21 20:02:27,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2024-06-21 20:02:27,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:27,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:27,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 20:02:27,284 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:27,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:27,285 INFO L85 PathProgramCache]: Analyzing trace with hash -437846502, now seen corresponding path program 3 times [2024-06-21 20:02:27,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:27,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001477978] [2024-06-21 20:02:27,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:27,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:27,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:27,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:27,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001477978] [2024-06-21 20:02:27,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001477978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:27,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:27,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:27,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789379752] [2024-06-21 20:02:27,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:27,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:27,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:27,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:27,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:27,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:27,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 145 transitions, 1915 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2024-06-21 20:02:27,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:27,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:27,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:27,496 INFO L124 PetriNetUnfolderBase]: 390/1030 cut-off events. [2024-06-21 20:02:27,496 INFO L125 PetriNetUnfolderBase]: For 21849/21873 co-relation queries the response was YES. [2024-06-21 20:02:27,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5623 conditions, 1030 events. 390/1030 cut-off events. For 21849/21873 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7140 event pairs, 77 based on Foata normal form. 16/1033 useless extension candidates. Maximal degree in co-relation 5387. Up to 276 conditions per place. [2024-06-21 20:02:27,504 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 81 selfloop transitions, 27 changer transitions 0/157 dead transitions. [2024-06-21 20:02:27,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 157 transitions, 2215 flow [2024-06-21 20:02:27,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:27,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:27,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-21 20:02:27,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6126126126126126 [2024-06-21 20:02:27,505 INFO L175 Difference]: Start difference. First operand has 178 places, 145 transitions, 1915 flow. Second operand 6 states and 136 transitions. [2024-06-21 20:02:27,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 157 transitions, 2215 flow [2024-06-21 20:02:27,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 157 transitions, 2160 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 20:02:27,562 INFO L231 Difference]: Finished difference. Result has 181 places, 145 transitions, 1920 flow [2024-06-21 20:02:27,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1860, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1920, PETRI_PLACES=181, PETRI_TRANSITIONS=145} [2024-06-21 20:02:27,563 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 143 predicate places. [2024-06-21 20:02:27,563 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 145 transitions, 1920 flow [2024-06-21 20:02:27,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2024-06-21 20:02:27,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:27,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:27,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 20:02:27,563 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:27,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:27,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1771629650, now seen corresponding path program 4 times [2024-06-21 20:02:27,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:27,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148647670] [2024-06-21 20:02:27,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:27,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:27,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:27,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:27,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148647670] [2024-06-21 20:02:27,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148647670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:27,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:27,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:27,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341457171] [2024-06-21 20:02:27,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:27,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:27,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:27,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:27,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:27,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:27,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 145 transitions, 1920 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2024-06-21 20:02:27,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:27,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:27,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:27,756 INFO L124 PetriNetUnfolderBase]: 395/1047 cut-off events. [2024-06-21 20:02:27,756 INFO L125 PetriNetUnfolderBase]: For 20463/20490 co-relation queries the response was YES. [2024-06-21 20:02:27,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5729 conditions, 1047 events. 395/1047 cut-off events. For 20463/20490 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7286 event pairs, 95 based on Foata normal form. 10/1039 useless extension candidates. Maximal degree in co-relation 5329. Up to 326 conditions per place. [2024-06-21 20:02:27,764 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 77 selfloop transitions, 31 changer transitions 0/157 dead transitions. [2024-06-21 20:02:27,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 157 transitions, 2292 flow [2024-06-21 20:02:27,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:27,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:27,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-21 20:02:27,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945945945945946 [2024-06-21 20:02:27,764 INFO L175 Difference]: Start difference. First operand has 181 places, 145 transitions, 1920 flow. Second operand 6 states and 132 transitions. [2024-06-21 20:02:27,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 157 transitions, 2292 flow [2024-06-21 20:02:27,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 157 transitions, 2227 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 20:02:27,827 INFO L231 Difference]: Finished difference. Result has 182 places, 146 transitions, 1935 flow [2024-06-21 20:02:27,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1855, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1935, PETRI_PLACES=182, PETRI_TRANSITIONS=146} [2024-06-21 20:02:27,828 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 144 predicate places. [2024-06-21 20:02:27,828 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 146 transitions, 1935 flow [2024-06-21 20:02:27,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2024-06-21 20:02:27,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:27,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:27,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 20:02:27,829 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:27,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:27,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1774430810, now seen corresponding path program 5 times [2024-06-21 20:02:27,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:27,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897110387] [2024-06-21 20:02:27,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:27,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:27,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:27,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:27,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:27,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897110387] [2024-06-21 20:02:27,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897110387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:27,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:27,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:27,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159140641] [2024-06-21 20:02:27,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:27,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:27,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:27,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:27,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:27,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:27,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 146 transitions, 1935 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2024-06-21 20:02:27,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:27,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:27,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:28,033 INFO L124 PetriNetUnfolderBase]: 389/1033 cut-off events. [2024-06-21 20:02:28,033 INFO L125 PetriNetUnfolderBase]: For 20140/20160 co-relation queries the response was YES. [2024-06-21 20:02:28,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5459 conditions, 1033 events. 389/1033 cut-off events. For 20140/20160 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7142 event pairs, 88 based on Foata normal form. 12/1028 useless extension candidates. Maximal degree in co-relation 5066. Up to 324 conditions per place. [2024-06-21 20:02:28,040 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 88 selfloop transitions, 20 changer transitions 0/157 dead transitions. [2024-06-21 20:02:28,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 157 transitions, 2297 flow [2024-06-21 20:02:28,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:28,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:28,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-21 20:02:28,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5990990990990991 [2024-06-21 20:02:28,041 INFO L175 Difference]: Start difference. First operand has 182 places, 146 transitions, 1935 flow. Second operand 6 states and 133 transitions. [2024-06-21 20:02:28,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 157 transitions, 2297 flow [2024-06-21 20:02:28,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 157 transitions, 2234 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 20:02:28,095 INFO L231 Difference]: Finished difference. Result has 183 places, 146 transitions, 1918 flow [2024-06-21 20:02:28,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1872, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1918, PETRI_PLACES=183, PETRI_TRANSITIONS=146} [2024-06-21 20:02:28,095 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 145 predicate places. [2024-06-21 20:02:28,096 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 146 transitions, 1918 flow [2024-06-21 20:02:28,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2024-06-21 20:02:28,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:28,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:28,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 20:02:28,096 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:28,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:28,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1774426160, now seen corresponding path program 6 times [2024-06-21 20:02:28,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:28,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655625987] [2024-06-21 20:02:28,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:28,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:28,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:28,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:28,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:28,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655625987] [2024-06-21 20:02:28,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655625987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:28,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:28,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:28,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162223347] [2024-06-21 20:02:28,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:28,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:28,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:28,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:28,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:28,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:28,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 146 transitions, 1918 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2024-06-21 20:02:28,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:28,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:28,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:28,278 INFO L124 PetriNetUnfolderBase]: 386/1028 cut-off events. [2024-06-21 20:02:28,278 INFO L125 PetriNetUnfolderBase]: For 16746/16762 co-relation queries the response was YES. [2024-06-21 20:02:28,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5358 conditions, 1028 events. 386/1028 cut-off events. For 16746/16762 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7088 event pairs, 88 based on Foata normal form. 6/1019 useless extension candidates. Maximal degree in co-relation 4966. Up to 322 conditions per place. [2024-06-21 20:02:28,286 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 88 selfloop transitions, 19 changer transitions 0/156 dead transitions. [2024-06-21 20:02:28,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 156 transitions, 2216 flow [2024-06-21 20:02:28,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:28,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:28,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-21 20:02:28,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5990990990990991 [2024-06-21 20:02:28,287 INFO L175 Difference]: Start difference. First operand has 183 places, 146 transitions, 1918 flow. Second operand 6 states and 133 transitions. [2024-06-21 20:02:28,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 156 transitions, 2216 flow [2024-06-21 20:02:28,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 156 transitions, 2157 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 20:02:28,342 INFO L231 Difference]: Finished difference. Result has 184 places, 146 transitions, 1901 flow [2024-06-21 20:02:28,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1859, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1901, PETRI_PLACES=184, PETRI_TRANSITIONS=146} [2024-06-21 20:02:28,343 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 146 predicate places. [2024-06-21 20:02:28,344 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 146 transitions, 1901 flow [2024-06-21 20:02:28,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2024-06-21 20:02:28,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:28,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:28,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 20:02:28,344 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:28,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:28,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1700235337, now seen corresponding path program 1 times [2024-06-21 20:02:28,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:28,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427106710] [2024-06-21 20:02:28,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:28,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:28,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:28,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:28,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:28,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427106710] [2024-06-21 20:02:28,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427106710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:28,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:28,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:28,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722695428] [2024-06-21 20:02:28,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:28,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:28,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:28,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:28,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:28,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:28,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 146 transitions, 1901 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 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) [2024-06-21 20:02:28,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:28,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:28,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:28,562 INFO L124 PetriNetUnfolderBase]: 377/1016 cut-off events. [2024-06-21 20:02:28,563 INFO L125 PetriNetUnfolderBase]: For 16035/16048 co-relation queries the response was YES. [2024-06-21 20:02:28,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5208 conditions, 1016 events. 377/1016 cut-off events. For 16035/16048 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7082 event pairs, 105 based on Foata normal form. 2/1002 useless extension candidates. Maximal degree in co-relation 4811. Up to 292 conditions per place. [2024-06-21 20:02:28,571 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 68 selfloop transitions, 27 changer transitions 10/154 dead transitions. [2024-06-21 20:02:28,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 154 transitions, 2193 flow [2024-06-21 20:02:28,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:28,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:28,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-21 20:02:28,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5900900900900901 [2024-06-21 20:02:28,572 INFO L175 Difference]: Start difference. First operand has 184 places, 146 transitions, 1901 flow. Second operand 6 states and 131 transitions. [2024-06-21 20:02:28,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 154 transitions, 2193 flow [2024-06-21 20:02:28,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 154 transitions, 2126 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 20:02:28,626 INFO L231 Difference]: Finished difference. Result has 184 places, 140 transitions, 1808 flow [2024-06-21 20:02:28,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1834, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1808, PETRI_PLACES=184, PETRI_TRANSITIONS=140} [2024-06-21 20:02:28,627 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 146 predicate places. [2024-06-21 20:02:28,627 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 140 transitions, 1808 flow [2024-06-21 20:02:28,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 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) [2024-06-21 20:02:28,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:28,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:28,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 20:02:28,628 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:28,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:28,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1824735663, now seen corresponding path program 2 times [2024-06-21 20:02:28,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:28,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285915029] [2024-06-21 20:02:28,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:28,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:28,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:28,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:28,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285915029] [2024-06-21 20:02:28,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285915029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:28,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:28,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:28,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897971911] [2024-06-21 20:02:28,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:28,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:28,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:28,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:28,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:28,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:28,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 140 transitions, 1808 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 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) [2024-06-21 20:02:28,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:28,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:28,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:28,828 INFO L124 PetriNetUnfolderBase]: 346/943 cut-off events. [2024-06-21 20:02:28,828 INFO L125 PetriNetUnfolderBase]: For 14975/14988 co-relation queries the response was YES. [2024-06-21 20:02:28,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4815 conditions, 943 events. 346/943 cut-off events. For 14975/14988 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6483 event pairs, 100 based on Foata normal form. 2/929 useless extension candidates. Maximal degree in co-relation 4457. Up to 274 conditions per place. [2024-06-21 20:02:28,835 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 42 selfloop transitions, 55 changer transitions 0/146 dead transitions. [2024-06-21 20:02:28,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 146 transitions, 2014 flow [2024-06-21 20:02:28,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:28,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:28,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-21 20:02:28,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5900900900900901 [2024-06-21 20:02:28,836 INFO L175 Difference]: Start difference. First operand has 184 places, 140 transitions, 1808 flow. Second operand 6 states and 131 transitions. [2024-06-21 20:02:28,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 146 transitions, 2014 flow [2024-06-21 20:02:28,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 146 transitions, 1897 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 20:02:28,884 INFO L231 Difference]: Finished difference. Result has 174 places, 140 transitions, 1805 flow [2024-06-21 20:02:28,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1691, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1805, PETRI_PLACES=174, PETRI_TRANSITIONS=140} [2024-06-21 20:02:28,885 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 136 predicate places. [2024-06-21 20:02:28,885 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 140 transitions, 1805 flow [2024-06-21 20:02:28,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 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) [2024-06-21 20:02:28,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:28,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:28,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 20:02:28,886 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:28,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:28,886 INFO L85 PathProgramCache]: Analyzing trace with hash -14110680, now seen corresponding path program 1 times [2024-06-21 20:02:28,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:28,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679354441] [2024-06-21 20:02:28,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:28,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:28,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:28,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:28,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:28,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679354441] [2024-06-21 20:02:28,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679354441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:28,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:28,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:28,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44177744] [2024-06-21 20:02:28,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:28,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:28,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:28,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:28,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:28,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:28,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 140 transitions, 1805 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 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) [2024-06-21 20:02:28,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:28,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:28,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:29,086 INFO L124 PetriNetUnfolderBase]: 352/950 cut-off events. [2024-06-21 20:02:29,086 INFO L125 PetriNetUnfolderBase]: For 12632/12645 co-relation queries the response was YES. [2024-06-21 20:02:29,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4780 conditions, 950 events. 352/950 cut-off events. For 12632/12645 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6495 event pairs, 50 based on Foata normal form. 2/942 useless extension candidates. Maximal degree in co-relation 4553. Up to 135 conditions per place. [2024-06-21 20:02:29,093 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 47 selfloop transitions, 59 changer transitions 0/155 dead transitions. [2024-06-21 20:02:29,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 155 transitions, 2113 flow [2024-06-21 20:02:29,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:29,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:29,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-21 20:02:29,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6351351351351351 [2024-06-21 20:02:29,094 INFO L175 Difference]: Start difference. First operand has 174 places, 140 transitions, 1805 flow. Second operand 6 states and 141 transitions. [2024-06-21 20:02:29,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 155 transitions, 2113 flow [2024-06-21 20:02:29,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 155 transitions, 1990 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 20:02:29,137 INFO L231 Difference]: Finished difference. Result has 174 places, 140 transitions, 1806 flow [2024-06-21 20:02:29,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1682, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1806, PETRI_PLACES=174, PETRI_TRANSITIONS=140} [2024-06-21 20:02:29,137 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 136 predicate places. [2024-06-21 20:02:29,137 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 140 transitions, 1806 flow [2024-06-21 20:02:29,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 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) [2024-06-21 20:02:29,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:29,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:29,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 20:02:29,138 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:29,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:29,138 INFO L85 PathProgramCache]: Analyzing trace with hash -206409370, now seen corresponding path program 2 times [2024-06-21 20:02:29,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:29,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676435756] [2024-06-21 20:02:29,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:29,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:29,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:29,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:29,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:29,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676435756] [2024-06-21 20:02:29,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676435756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:29,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:29,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:29,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521755003] [2024-06-21 20:02:29,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:29,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:29,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:29,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:29,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:29,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:29,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 140 transitions, 1806 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 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) [2024-06-21 20:02:29,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:29,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:29,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:29,325 INFO L124 PetriNetUnfolderBase]: 356/958 cut-off events. [2024-06-21 20:02:29,325 INFO L125 PetriNetUnfolderBase]: For 13309/13322 co-relation queries the response was YES. [2024-06-21 20:02:29,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4845 conditions, 958 events. 356/958 cut-off events. For 13309/13322 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6555 event pairs, 51 based on Foata normal form. 2/950 useless extension candidates. Maximal degree in co-relation 4611. Up to 212 conditions per place. [2024-06-21 20:02:29,332 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 67 selfloop transitions, 26 changer transitions 11/153 dead transitions. [2024-06-21 20:02:29,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 153 transitions, 2120 flow [2024-06-21 20:02:29,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:29,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:29,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-21 20:02:29,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6081081081081081 [2024-06-21 20:02:29,337 INFO L175 Difference]: Start difference. First operand has 174 places, 140 transitions, 1806 flow. Second operand 6 states and 135 transitions. [2024-06-21 20:02:29,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 153 transitions, 2120 flow [2024-06-21 20:02:29,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 153 transitions, 1940 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 20:02:29,386 INFO L231 Difference]: Finished difference. Result has 172 places, 134 transitions, 1619 flow [2024-06-21 20:02:29,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1631, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1619, PETRI_PLACES=172, PETRI_TRANSITIONS=134} [2024-06-21 20:02:29,387 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 134 predicate places. [2024-06-21 20:02:29,387 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 134 transitions, 1619 flow [2024-06-21 20:02:29,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 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) [2024-06-21 20:02:29,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:29,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:29,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 20:02:29,388 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:29,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:29,388 INFO L85 PathProgramCache]: Analyzing trace with hash 2062351812, now seen corresponding path program 3 times [2024-06-21 20:02:29,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:29,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042329357] [2024-06-21 20:02:29,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:29,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:29,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:29,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:29,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042329357] [2024-06-21 20:02:29,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042329357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:29,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:29,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:29,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808699987] [2024-06-21 20:02:29,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:29,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:29,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:29,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:29,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:29,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:29,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 134 transitions, 1619 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 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) [2024-06-21 20:02:29,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:29,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:29,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:29,603 INFO L124 PetriNetUnfolderBase]: 315/860 cut-off events. [2024-06-21 20:02:29,603 INFO L125 PetriNetUnfolderBase]: For 11126/11137 co-relation queries the response was YES. [2024-06-21 20:02:29,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4155 conditions, 860 events. 315/860 cut-off events. For 11126/11137 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5769 event pairs, 60 based on Foata normal form. 2/850 useless extension candidates. Maximal degree in co-relation 3931. Up to 208 conditions per place. [2024-06-21 20:02:29,609 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 72 selfloop transitions, 22 changer transitions 8/151 dead transitions. [2024-06-21 20:02:29,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 151 transitions, 1863 flow [2024-06-21 20:02:29,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:29,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:29,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-21 20:02:29,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306306306306306 [2024-06-21 20:02:29,612 INFO L175 Difference]: Start difference. First operand has 172 places, 134 transitions, 1619 flow. Second operand 6 states and 140 transitions. [2024-06-21 20:02:29,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 151 transitions, 1863 flow [2024-06-21 20:02:29,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 151 transitions, 1801 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 20:02:29,648 INFO L231 Difference]: Finished difference. Result has 164 places, 129 transitions, 1549 flow [2024-06-21 20:02:29,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1557, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1549, PETRI_PLACES=164, PETRI_TRANSITIONS=129} [2024-06-21 20:02:29,649 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 126 predicate places. [2024-06-21 20:02:29,649 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 129 transitions, 1549 flow [2024-06-21 20:02:29,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 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) [2024-06-21 20:02:29,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:29,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:29,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 20:02:29,649 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:29,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:29,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1958057263, now seen corresponding path program 1 times [2024-06-21 20:02:29,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:29,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374212630] [2024-06-21 20:02:29,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:29,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:29,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:29,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:29,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374212630] [2024-06-21 20:02:29,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374212630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:29,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:29,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:29,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631398470] [2024-06-21 20:02:29,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:29,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:29,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:29,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:29,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:29,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:29,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 129 transitions, 1549 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:29,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:29,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:29,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:29,824 INFO L124 PetriNetUnfolderBase]: 291/789 cut-off events. [2024-06-21 20:02:29,824 INFO L125 PetriNetUnfolderBase]: For 8794/8807 co-relation queries the response was YES. [2024-06-21 20:02:29,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3766 conditions, 789 events. 291/789 cut-off events. For 8794/8807 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5173 event pairs, 22 based on Foata normal form. 4/783 useless extension candidates. Maximal degree in co-relation 3573. Up to 213 conditions per place. [2024-06-21 20:02:29,829 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 38 selfloop transitions, 18 changer transitions 55/143 dead transitions. [2024-06-21 20:02:29,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 143 transitions, 1769 flow [2024-06-21 20:02:29,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:29,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:29,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-21 20:02:29,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6216216216216216 [2024-06-21 20:02:29,830 INFO L175 Difference]: Start difference. First operand has 164 places, 129 transitions, 1549 flow. Second operand 6 states and 138 transitions. [2024-06-21 20:02:29,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 143 transitions, 1769 flow [2024-06-21 20:02:29,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 143 transitions, 1707 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 20:02:29,856 INFO L231 Difference]: Finished difference. Result has 155 places, 82 transitions, 894 flow [2024-06-21 20:02:29,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1487, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=894, PETRI_PLACES=155, PETRI_TRANSITIONS=82} [2024-06-21 20:02:29,857 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 117 predicate places. [2024-06-21 20:02:29,857 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 82 transitions, 894 flow [2024-06-21 20:02:29,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:29,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:29,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:29,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 20:02:29,858 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:02:29,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:29,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1575778163, now seen corresponding path program 2 times [2024-06-21 20:02:29,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:29,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975616512] [2024-06-21 20:02:29,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:29,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:29,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:29,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:29,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975616512] [2024-06-21 20:02:29,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975616512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:29,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:29,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:29,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247455200] [2024-06-21 20:02:29,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:29,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:02:29,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:29,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:02:29,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:02:29,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-06-21 20:02:29,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 82 transitions, 894 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:29,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:29,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-06-21 20:02:29,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:30,012 INFO L124 PetriNetUnfolderBase]: 156/435 cut-off events. [2024-06-21 20:02:30,012 INFO L125 PetriNetUnfolderBase]: For 4341/4351 co-relation queries the response was YES. [2024-06-21 20:02:30,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1963 conditions, 435 events. 156/435 cut-off events. For 4341/4351 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2424 event pairs, 18 based on Foata normal form. 4/432 useless extension candidates. Maximal degree in co-relation 1906. Up to 80 conditions per place. [2024-06-21 20:02:30,014 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 0 selfloop transitions, 0 changer transitions 87/87 dead transitions. [2024-06-21 20:02:30,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 87 transitions, 964 flow [2024-06-21 20:02:30,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:02:30,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:02:30,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-21 20:02:30,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5405405405405406 [2024-06-21 20:02:30,015 INFO L175 Difference]: Start difference. First operand has 155 places, 82 transitions, 894 flow. Second operand 6 states and 120 transitions. [2024-06-21 20:02:30,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 87 transitions, 964 flow [2024-06-21 20:02:30,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 87 transitions, 681 flow, removed 11 selfloop flow, removed 46 redundant places. [2024-06-21 20:02:30,022 INFO L231 Difference]: Finished difference. Result has 98 places, 0 transitions, 0 flow [2024-06-21 20:02:30,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=98, PETRI_TRANSITIONS=0} [2024-06-21 20:02:30,023 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 60 predicate places. [2024-06-21 20:02:30,023 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 0 transitions, 0 flow [2024-06-21 20:02:30,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:02:30,025 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-21 20:02:30,025 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-21 20:02:30,026 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-21 20:02:30,028 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-21 20:02:30,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 20:02:30,028 INFO L445 BasicCegarLoop]: Path program histogram: [6, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:30,030 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 20:02:30,030 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 20:02:30,033 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-21 20:02:30,033 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-21 20:02:30,034 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 08:02:30 BasicIcfg [2024-06-21 20:02:30,034 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 20:02:30,034 INFO L158 Benchmark]: Toolchain (without parser) took 13107.93ms. Allocated memory was 159.4MB in the beginning and 474.0MB in the end (delta: 314.6MB). Free memory was 122.8MB in the beginning and 425.6MB in the end (delta: -302.8MB). Peak memory consumption was 279.8MB. Max. memory is 16.1GB. [2024-06-21 20:02:30,034 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 159.4MB. Free memory is still 128.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 20:02:30,034 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 159.4MB. Free memory is still 125.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 20:02:30,035 INFO L158 Benchmark]: CACSL2BoogieTranslator took 522.79ms. Allocated memory is still 159.4MB. Free memory was 122.2MB in the beginning and 96.3MB in the end (delta: 25.9MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-21 20:02:30,035 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.45ms. Allocated memory is still 159.4MB. Free memory was 96.3MB in the beginning and 94.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 20:02:30,035 INFO L158 Benchmark]: Boogie Preprocessor took 74.02ms. Allocated memory is still 159.4MB. Free memory was 94.3MB in the beginning and 128.6MB in the end (delta: -34.3MB). Peak memory consumption was 4.7MB. Max. memory is 16.1GB. [2024-06-21 20:02:30,038 INFO L158 Benchmark]: RCFGBuilder took 387.67ms. Allocated memory is still 159.4MB. Free memory was 128.6MB in the beginning and 108.7MB in the end (delta: 19.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-06-21 20:02:30,038 INFO L158 Benchmark]: TraceAbstraction took 12060.09ms. Allocated memory was 159.4MB in the beginning and 474.0MB in the end (delta: 314.6MB). Free memory was 107.8MB in the beginning and 425.6MB in the end (delta: -317.9MB). Peak memory consumption was 266.7MB. Max. memory is 16.1GB. [2024-06-21 20:02:30,038 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.16ms. Allocated memory is still 159.4MB. Free memory is still 128.6MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.12ms. Allocated memory is still 159.4MB. Free memory is still 125.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 522.79ms. Allocated memory is still 159.4MB. Free memory was 122.2MB in the beginning and 96.3MB in the end (delta: 25.9MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.45ms. Allocated memory is still 159.4MB. Free memory was 96.3MB in the beginning and 94.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 74.02ms. Allocated memory is still 159.4MB. Free memory was 94.3MB in the beginning and 128.6MB in the end (delta: -34.3MB). Peak memory consumption was 4.7MB. Max. memory is 16.1GB. * RCFGBuilder took 387.67ms. Allocated memory is still 159.4MB. Free memory was 128.6MB in the beginning and 108.7MB in the end (delta: 19.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 12060.09ms. Allocated memory was 159.4MB in the beginning and 474.0MB in the end (delta: 314.6MB). Free memory was 107.8MB in the beginning and 425.6MB in the end (delta: -317.9MB). Peak memory consumption was 266.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 762]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 763]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 60 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 11.9s, OverallIterations: 46, TraceHistogramMax: 1, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 8.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3509 SdHoareTripleChecker+Valid, 2.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2509 mSDsluCounter, 1344 SdHoareTripleChecker+Invalid, 2.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 978 mSDsCounter, 220 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5831 IncrementalHoareTripleChecker+Invalid, 6051 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 220 mSolverCounterUnsat, 366 mSDtfsCounter, 5831 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 231 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2103occurred in iteration=28, InterpolantAutomatonStates: 278, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 742 NumberOfCodeBlocks, 742 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 696 ConstructedInterpolants, 0 QuantifiedInterpolants, 2889 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 46 InterpolantComputations, 46 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-21 20:02:30,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE