./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.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 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:58:36,316 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:58:36,395 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:58:36,400 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:58:36,401 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:58:36,413 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:58:36,413 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:58:36,413 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:58:36,414 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:58:36,414 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:58:36,414 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:58:36,414 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:58:36,415 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:58:36,415 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:58:36,415 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:58:36,416 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:58:36,416 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:58:36,416 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:58:36,416 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:58:36,417 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:58:36,417 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:58:36,419 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:58:36,419 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:58:36,419 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:58:36,419 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:58:36,420 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:58:36,420 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:58:36,420 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:58:36,420 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:58:36,421 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:58:36,421 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:58:36,422 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:58:36,422 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:58:36,422 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:58:36,422 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:58:36,422 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:58:36,422 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:58:36,423 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:58:36,423 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:58:36,423 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:58:36,423 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:58:36,423 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:58:36,423 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:58:36,424 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 17:58:36,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:58:36,605 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:58:36,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:58:36,608 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 17:58:36,608 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 17:58:36,609 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-27 17:58:36,759 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:58:36,759 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:58:36,760 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 17:58:37,705 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:58:37,898 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:58:37,899 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 17:58:37,909 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/012d20db2/069b1b76144546aaba833f2110aa59d0/FLAGbe4d94530 [2024-06-27 17:58:37,925 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/012d20db2/069b1b76144546aaba833f2110aa59d0 [2024-06-27 17:58:37,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:58:37,929 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 17:58:37,930 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:58:37,931 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:58:37,934 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:58:37,935 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:58:36" (1/2) ... [2024-06-27 17:58:37,936 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e66a6e8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:58:37, skipping insertion in model container [2024-06-27 17:58:37,936 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:58:36" (1/2) ... [2024-06-27 17:58:37,937 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4948c9a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:58:37, skipping insertion in model container [2024-06-27 17:58:37,938 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:58:37" (2/2) ... [2024-06-27 17:58:37,938 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e66a6e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:58:37, skipping insertion in model container [2024-06-27 17:58:37,939 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:58:37" (2/2) ... [2024-06-27 17:58:37,939 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 17:58:37,998 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 17:58:37,999 INFO L97 edCorrectnessWitness]: Location invariant before [L805-L805] ((((((((! multithreaded || (a == 0 || a == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) [2024-06-27 17:58:37,999 INFO L97 edCorrectnessWitness]: Location invariant before [L807-L807] ((((((((! multithreaded || (a == 0 || a == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) [2024-06-27 17:58:38,000 INFO L97 edCorrectnessWitness]: Location invariant before [L803-L803] ((((((((! multithreaded || (a == 0 || a == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) [2024-06-27 17:58:38,000 INFO L97 edCorrectnessWitness]: Location invariant before [L808-L808] ((((((((! multithreaded || (a == 0 || a == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) [2024-06-27 17:58:38,000 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 17:58:38,000 INFO L106 edCorrectnessWitness]: ghost_update [L801-L801] multithreaded = 1; [2024-06-27 17:58:38,035 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:58:38,189 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2024-06-27 17:58:38,332 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:58:38,339 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 17:58:38,368 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 17:58:38,433 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:58:38,466 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:58:38,466 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:58:38 WrapperNode [2024-06-27 17:58:38,467 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:58:38,467 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:58:38,468 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:58:38,468 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:58:38,473 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:58:38" (1/1) ... [2024-06-27 17:58:38,483 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:58:38" (1/1) ... [2024-06-27 17:58:38,504 INFO L138 Inliner]: procedures = 176, calls = 50, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2024-06-27 17:58:38,504 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:58:38,505 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:58:38,505 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:58:38,505 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:58:38,514 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:58:38" (1/1) ... [2024-06-27 17:58:38,514 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:58:38" (1/1) ... [2024-06-27 17:58:38,516 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:58:38" (1/1) ... [2024-06-27 17:58:38,526 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]. [2024-06-27 17:58:38,527 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:58:38" (1/1) ... [2024-06-27 17:58:38,527 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:58:38" (1/1) ... [2024-06-27 17:58:38,532 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:58:38" (1/1) ... [2024-06-27 17:58:38,533 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:58:38" (1/1) ... [2024-06-27 17:58:38,534 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:58:38" (1/1) ... [2024-06-27 17:58:38,535 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:58:38" (1/1) ... [2024-06-27 17:58:38,537 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:58:38,538 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:58:38,538 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:58:38,538 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:58:38,539 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:58:38" (1/1) ... [2024-06-27 17:58:38,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:58:38,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:58:38,558 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) [2024-06-27 17:58:38,575 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 [2024-06-27 17:58:38,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:58:38,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:58:38,586 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 17:58:38,586 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 17:58:38,586 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 17:58:38,586 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 17:58:38,586 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 17:58:38,586 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 17:58:38,587 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-27 17:58:38,587 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-27 17:58:38,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:58:38,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:58:38,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:58:38,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:58:38,591 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 17:58:38,696 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:58:38,698 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:58:38,844 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:58:38,844 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:58:38,927 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:58:38,930 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 17:58:38,931 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:58:38 BoogieIcfgContainer [2024-06-27 17:58:38,952 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:58:38,959 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:58:38,959 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:58:38,962 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:58:38,962 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:58:36" (1/4) ... [2024-06-27 17:58:38,963 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6496a984 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:58:38, skipping insertion in model container [2024-06-27 17:58:38,963 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:58:37" (2/4) ... [2024-06-27 17:58:38,963 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6496a984 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:58:38, skipping insertion in model container [2024-06-27 17:58:38,964 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:58:38" (3/4) ... [2024-06-27 17:58:38,964 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6496a984 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:58:38, skipping insertion in model container [2024-06-27 17:58:38,964 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:58:38" (4/4) ... [2024-06-27 17:58:38,966 INFO L112 eAbstractionObserver]: Analyzing ICFG thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 17:58:38,978 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:58:38,978 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-06-27 17:58:38,978 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:58:39,028 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 17:58:39,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 56 transitions, 128 flow [2024-06-27 17:58:39,099 INFO L124 PetriNetUnfolderBase]: 1/52 cut-off events. [2024-06-27 17:58:39,100 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:58:39,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 52 events. 1/52 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 85 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2024-06-27 17:58:39,104 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 56 transitions, 128 flow [2024-06-27 17:58:39,108 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 49 transitions, 110 flow [2024-06-27 17:58:39,117 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:58:39,126 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;@3102e912, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:58:39,126 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-06-27 17:58:39,131 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:58:39,131 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 17:58:39,132 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:58:39,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:39,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 17:58:39,133 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:39,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:39,136 INFO L85 PathProgramCache]: Analyzing trace with hash 223717682, now seen corresponding path program 1 times [2024-06-27 17:58:39,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:39,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142146803] [2024-06-27 17:58:39,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:39,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:39,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:39,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142146803] [2024-06-27 17:58:39,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142146803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:39,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:39,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 17:58:39,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403561241] [2024-06-27 17:58:39,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:39,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:58:39,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:39,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:58:39,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:58:39,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 56 [2024-06-27 17:58:39,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 49 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2024-06-27 17:58:39,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:39,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 56 [2024-06-27 17:58:39,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:40,116 INFO L124 PetriNetUnfolderBase]: 4259/6301 cut-off events. [2024-06-27 17:58:40,117 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2024-06-27 17:58:40,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12349 conditions, 6301 events. 4259/6301 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 37127 event pairs, 2762 based on Foata normal form. 1/6215 useless extension candidates. Maximal degree in co-relation 12336. Up to 5859 conditions per place. [2024-06-27 17:58:40,165 INFO L140 encePairwiseOnDemand]: 47/56 looper letters, 41 selfloop transitions, 5 changer transitions 0/65 dead transitions. [2024-06-27 17:58:40,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 65 transitions, 243 flow [2024-06-27 17:58:40,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:58:40,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:58:40,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2024-06-27 17:58:40,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7261904761904762 [2024-06-27 17:58:40,177 INFO L175 Difference]: Start difference. First operand has 62 places, 49 transitions, 110 flow. Second operand 3 states and 122 transitions. [2024-06-27 17:58:40,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 65 transitions, 243 flow [2024-06-27 17:58:40,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 65 transitions, 236 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 17:58:40,186 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 145 flow [2024-06-27 17:58:40,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2024-06-27 17:58:40,192 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -1 predicate places. [2024-06-27 17:58:40,192 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 145 flow [2024-06-27 17:58:40,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2024-06-27 17:58:40,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:40,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:40,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:58:40,194 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:40,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:40,194 INFO L85 PathProgramCache]: Analyzing trace with hash -987781391, now seen corresponding path program 1 times [2024-06-27 17:58:40,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:40,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664092784] [2024-06-27 17:58:40,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:40,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:40,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:40,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:40,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664092784] [2024-06-27 17:58:40,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664092784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:40,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:40,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:58:40,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480633634] [2024-06-27 17:58:40,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:40,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:58:40,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:40,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:58:40,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:58:40,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-06-27 17:58:40,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 145 flow. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 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) [2024-06-27 17:58:40,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:40,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-06-27 17:58:40,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:41,306 INFO L124 PetriNetUnfolderBase]: 6869/10659 cut-off events. [2024-06-27 17:58:41,307 INFO L125 PetriNetUnfolderBase]: For 1667/1689 co-relation queries the response was YES. [2024-06-27 17:58:41,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22973 conditions, 10659 events. 6869/10659 cut-off events. For 1667/1689 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 69048 event pairs, 4112 based on Foata normal form. 10/10591 useless extension candidates. Maximal degree in co-relation 22961. Up to 9309 conditions per place. [2024-06-27 17:58:41,367 INFO L140 encePairwiseOnDemand]: 46/56 looper letters, 60 selfloop transitions, 9 changer transitions 0/86 dead transitions. [2024-06-27 17:58:41,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 86 transitions, 374 flow [2024-06-27 17:58:41,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:58:41,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:58:41,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 157 transitions. [2024-06-27 17:58:41,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7008928571428571 [2024-06-27 17:58:41,373 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 145 flow. Second operand 4 states and 157 transitions. [2024-06-27 17:58:41,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 86 transitions, 374 flow [2024-06-27 17:58:41,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 86 transitions, 366 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:58:41,377 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 216 flow [2024-06-27 17:58:41,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=216, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2024-06-27 17:58:41,378 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 3 predicate places. [2024-06-27 17:58:41,380 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 216 flow [2024-06-27 17:58:41,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 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) [2024-06-27 17:58:41,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:41,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:41,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:58:41,385 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:41,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:41,386 INFO L85 PathProgramCache]: Analyzing trace with hash -70102224, now seen corresponding path program 1 times [2024-06-27 17:58:41,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:41,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747911389] [2024-06-27 17:58:41,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:41,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:41,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:41,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:41,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:41,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747911389] [2024-06-27 17:58:41,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747911389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:41,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:41,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:41,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658186067] [2024-06-27 17:58:41,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:41,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:41,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:41,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:41,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:41,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-06-27 17:58:41,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 216 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 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) [2024-06-27 17:58:41,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:41,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-06-27 17:58:41,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:42,388 INFO L124 PetriNetUnfolderBase]: 6853/10001 cut-off events. [2024-06-27 17:58:42,389 INFO L125 PetriNetUnfolderBase]: For 4356/4439 co-relation queries the response was YES. [2024-06-27 17:58:42,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24873 conditions, 10001 events. 6853/10001 cut-off events. For 4356/4439 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 60231 event pairs, 2631 based on Foata normal form. 32/10023 useless extension candidates. Maximal degree in co-relation 24858. Up to 9235 conditions per place. [2024-06-27 17:58:42,444 INFO L140 encePairwiseOnDemand]: 46/56 looper letters, 69 selfloop transitions, 12 changer transitions 0/98 dead transitions. [2024-06-27 17:58:42,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 98 transitions, 474 flow [2024-06-27 17:58:42,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:58:42,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:58:42,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 191 transitions. [2024-06-27 17:58:42,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6821428571428572 [2024-06-27 17:58:42,446 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 216 flow. Second operand 5 states and 191 transitions. [2024-06-27 17:58:42,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 98 transitions, 474 flow [2024-06-27 17:58:42,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 98 transitions, 470 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 17:58:42,451 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 262 flow [2024-06-27 17:58:42,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=262, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2024-06-27 17:58:42,453 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 7 predicate places. [2024-06-27 17:58:42,453 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 262 flow [2024-06-27 17:58:42,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 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) [2024-06-27 17:58:42,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:42,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:42,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:58:42,454 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:42,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:42,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1310696065, now seen corresponding path program 1 times [2024-06-27 17:58:42,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:42,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855874489] [2024-06-27 17:58:42,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:42,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:42,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:42,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:42,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855874489] [2024-06-27 17:58:42,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855874489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:42,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:42,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:58:42,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173731260] [2024-06-27 17:58:42,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:42,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:58:42,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:42,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:58:42,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:58:42,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-06-27 17:58:42,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 262 flow. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:42,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:42,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-06-27 17:58:42,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:43,328 INFO L124 PetriNetUnfolderBase]: 6790/10325 cut-off events. [2024-06-27 17:58:43,328 INFO L125 PetriNetUnfolderBase]: For 8125/8135 co-relation queries the response was YES. [2024-06-27 17:58:43,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27080 conditions, 10325 events. 6790/10325 cut-off events. For 8125/8135 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 65494 event pairs, 3673 based on Foata normal form. 6/10318 useless extension candidates. Maximal degree in co-relation 27062. Up to 9204 conditions per place. [2024-06-27 17:58:43,386 INFO L140 encePairwiseOnDemand]: 47/56 looper letters, 67 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2024-06-27 17:58:43,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 530 flow [2024-06-27 17:58:43,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:58:43,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:58:43,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-06-27 17:58:43,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-06-27 17:58:43,387 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 262 flow. Second operand 4 states and 152 transitions. [2024-06-27 17:58:43,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 530 flow [2024-06-27 17:58:43,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 95 transitions, 494 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 17:58:43,394 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 339 flow [2024-06-27 17:58:43,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=339, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2024-06-27 17:58:43,396 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 9 predicate places. [2024-06-27 17:58:43,396 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 339 flow [2024-06-27 17:58:43,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:43,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:43,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:43,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:58:43,396 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:43,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:43,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1146871676, now seen corresponding path program 1 times [2024-06-27 17:58:43,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:43,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786778681] [2024-06-27 17:58:43,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:43,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:43,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:43,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:43,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786778681] [2024-06-27 17:58:43,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786778681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:43,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:43,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:43,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186628839] [2024-06-27 17:58:43,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:43,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:43,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:43,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:43,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:43,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-06-27 17:58:43,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 339 flow. Second operand has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 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) [2024-06-27 17:58:43,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:43,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-06-27 17:58:43,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:44,501 INFO L124 PetriNetUnfolderBase]: 8211/11970 cut-off events. [2024-06-27 17:58:44,501 INFO L125 PetriNetUnfolderBase]: For 15574/15837 co-relation queries the response was YES. [2024-06-27 17:58:44,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35244 conditions, 11970 events. 8211/11970 cut-off events. For 15574/15837 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 73984 event pairs, 3222 based on Foata normal form. 69/11965 useless extension candidates. Maximal degree in co-relation 35224. Up to 10972 conditions per place. [2024-06-27 17:58:44,650 INFO L140 encePairwiseOnDemand]: 46/56 looper letters, 74 selfloop transitions, 25 changer transitions 0/118 dead transitions. [2024-06-27 17:58:44,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 118 transitions, 703 flow [2024-06-27 17:58:44,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:58:44,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:58:44,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 195 transitions. [2024-06-27 17:58:44,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6964285714285714 [2024-06-27 17:58:44,656 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 339 flow. Second operand 5 states and 195 transitions. [2024-06-27 17:58:44,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 118 transitions, 703 flow [2024-06-27 17:58:44,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 118 transitions, 695 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-27 17:58:44,671 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 452 flow [2024-06-27 17:58:44,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=452, PETRI_PLACES=76, PETRI_TRANSITIONS=81} [2024-06-27 17:58:44,673 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 14 predicate places. [2024-06-27 17:58:44,673 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 452 flow [2024-06-27 17:58:44,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 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) [2024-06-27 17:58:44,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:44,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:44,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:58:44,674 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:44,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:44,675 INFO L85 PathProgramCache]: Analyzing trace with hash -366725786, now seen corresponding path program 2 times [2024-06-27 17:58:44,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:44,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331259579] [2024-06-27 17:58:44,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:44,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:44,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:44,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:44,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331259579] [2024-06-27 17:58:44,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331259579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:44,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:44,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:44,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64377093] [2024-06-27 17:58:44,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:44,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:44,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:44,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:44,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:44,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-06-27 17:58:44,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 81 transitions, 452 flow. Second operand has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 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) [2024-06-27 17:58:44,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:44,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-06-27 17:58:44,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:45,671 INFO L124 PetriNetUnfolderBase]: 8202/11958 cut-off events. [2024-06-27 17:58:45,671 INFO L125 PetriNetUnfolderBase]: For 24237/24548 co-relation queries the response was YES. [2024-06-27 17:58:45,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38534 conditions, 11958 events. 8202/11958 cut-off events. For 24237/24548 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 73545 event pairs, 3222 based on Foata normal form. 79/11965 useless extension candidates. Maximal degree in co-relation 38511. Up to 10982 conditions per place. [2024-06-27 17:58:45,843 INFO L140 encePairwiseOnDemand]: 46/56 looper letters, 66 selfloop transitions, 21 changer transitions 0/106 dead transitions. [2024-06-27 17:58:45,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 106 transitions, 688 flow [2024-06-27 17:58:45,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:58:45,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:58:45,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 157 transitions. [2024-06-27 17:58:45,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7008928571428571 [2024-06-27 17:58:45,855 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 452 flow. Second operand 4 states and 157 transitions. [2024-06-27 17:58:45,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 106 transitions, 688 flow [2024-06-27 17:58:45,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 106 transitions, 645 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-27 17:58:45,879 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 469 flow [2024-06-27 17:58:45,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=469, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2024-06-27 17:58:45,880 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 17 predicate places. [2024-06-27 17:58:45,880 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 469 flow [2024-06-27 17:58:45,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 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) [2024-06-27 17:58:45,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:45,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:45,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 17:58:45,881 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:45,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:45,881 INFO L85 PathProgramCache]: Analyzing trace with hash 708477662, now seen corresponding path program 1 times [2024-06-27 17:58:45,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:45,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184714320] [2024-06-27 17:58:45,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:45,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:46,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:46,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:46,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184714320] [2024-06-27 17:58:46,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184714320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:46,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:46,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:46,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112920577] [2024-06-27 17:58:46,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:46,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:46,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:46,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:46,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:46,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-06-27 17:58:46,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 469 flow. Second operand has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 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) [2024-06-27 17:58:46,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:46,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-06-27 17:58:46,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:46,820 INFO L124 PetriNetUnfolderBase]: 6813/9900 cut-off events. [2024-06-27 17:58:46,820 INFO L125 PetriNetUnfolderBase]: For 21115/21154 co-relation queries the response was YES. [2024-06-27 17:58:46,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32340 conditions, 9900 events. 6813/9900 cut-off events. For 21115/21154 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 60257 event pairs, 2996 based on Foata normal form. 19/9900 useless extension candidates. Maximal degree in co-relation 32315. Up to 9195 conditions per place. [2024-06-27 17:58:46,874 INFO L140 encePairwiseOnDemand]: 47/56 looper letters, 85 selfloop transitions, 14 changer transitions 0/116 dead transitions. [2024-06-27 17:58:46,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 116 transitions, 770 flow [2024-06-27 17:58:46,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:58:46,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:58:46,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 187 transitions. [2024-06-27 17:58:46,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6678571428571428 [2024-06-27 17:58:46,876 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 469 flow. Second operand 5 states and 187 transitions. [2024-06-27 17:58:46,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 116 transitions, 770 flow [2024-06-27 17:58:46,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 116 transitions, 728 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 17:58:46,886 INFO L231 Difference]: Finished difference. Result has 81 places, 84 transitions, 493 flow [2024-06-27 17:58:46,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=493, PETRI_PLACES=81, PETRI_TRANSITIONS=84} [2024-06-27 17:58:46,886 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 19 predicate places. [2024-06-27 17:58:46,887 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 84 transitions, 493 flow [2024-06-27 17:58:46,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 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) [2024-06-27 17:58:46,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:46,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:46,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 17:58:46,887 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:46,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:46,888 INFO L85 PathProgramCache]: Analyzing trace with hash 192902194, now seen corresponding path program 1 times [2024-06-27 17:58:46,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:46,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416864934] [2024-06-27 17:58:46,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:46,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:46,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:47,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:47,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:47,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416864934] [2024-06-27 17:58:47,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416864934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:47,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:47,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:47,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724720420] [2024-06-27 17:58:47,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:47,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:47,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:47,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:47,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:47,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 56 [2024-06-27 17:58:47,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 84 transitions, 493 flow. Second operand has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 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) [2024-06-27 17:58:47,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:47,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 56 [2024-06-27 17:58:47,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:48,093 INFO L124 PetriNetUnfolderBase]: 8661/12505 cut-off events. [2024-06-27 17:58:48,093 INFO L125 PetriNetUnfolderBase]: For 32273/32446 co-relation queries the response was YES. [2024-06-27 17:58:48,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42243 conditions, 12505 events. 8661/12505 cut-off events. For 32273/32446 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 75824 event pairs, 3384 based on Foata normal form. 40/12512 useless extension candidates. Maximal degree in co-relation 42217. Up to 11498 conditions per place. [2024-06-27 17:58:48,152 INFO L140 encePairwiseOnDemand]: 45/56 looper letters, 106 selfloop transitions, 27 changer transitions 0/149 dead transitions. [2024-06-27 17:58:48,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 149 transitions, 1045 flow [2024-06-27 17:58:48,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:48,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:48,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 227 transitions. [2024-06-27 17:58:48,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6755952380952381 [2024-06-27 17:58:48,153 INFO L175 Difference]: Start difference. First operand has 81 places, 84 transitions, 493 flow. Second operand 6 states and 227 transitions. [2024-06-27 17:58:48,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 149 transitions, 1045 flow [2024-06-27 17:58:48,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 149 transitions, 1005 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 17:58:48,172 INFO L231 Difference]: Finished difference. Result has 86 places, 101 transitions, 681 flow [2024-06-27 17:58:48,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=681, PETRI_PLACES=86, PETRI_TRANSITIONS=101} [2024-06-27 17:58:48,173 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 24 predicate places. [2024-06-27 17:58:48,173 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 101 transitions, 681 flow [2024-06-27 17:58:48,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 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) [2024-06-27 17:58:48,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:48,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:48,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 17:58:48,174 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:48,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:48,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1516409662, now seen corresponding path program 2 times [2024-06-27 17:58:48,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:48,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001181807] [2024-06-27 17:58:48,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:48,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:48,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:48,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:48,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001181807] [2024-06-27 17:58:48,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001181807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:48,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:48,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:48,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132422633] [2024-06-27 17:58:48,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:48,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:48,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:48,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:48,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:48,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 56 [2024-06-27 17:58:48,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 101 transitions, 681 flow. Second operand has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 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) [2024-06-27 17:58:48,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:48,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 56 [2024-06-27 17:58:48,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:49,407 INFO L124 PetriNetUnfolderBase]: 8691/12555 cut-off events. [2024-06-27 17:58:49,407 INFO L125 PetriNetUnfolderBase]: For 41805/42107 co-relation queries the response was YES. [2024-06-27 17:58:49,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45344 conditions, 12555 events. 8691/12555 cut-off events. For 41805/42107 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 76241 event pairs, 3356 based on Foata normal form. 81/12614 useless extension candidates. Maximal degree in co-relation 45315. Up to 11567 conditions per place. [2024-06-27 17:58:49,472 INFO L140 encePairwiseOnDemand]: 45/56 looper letters, 122 selfloop transitions, 26 changer transitions 0/164 dead transitions. [2024-06-27 17:58:49,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 164 transitions, 1222 flow [2024-06-27 17:58:49,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:49,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:49,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 260 transitions. [2024-06-27 17:58:49,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6632653061224489 [2024-06-27 17:58:49,474 INFO L175 Difference]: Start difference. First operand has 86 places, 101 transitions, 681 flow. Second operand 7 states and 260 transitions. [2024-06-27 17:58:49,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 164 transitions, 1222 flow [2024-06-27 17:58:49,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 164 transitions, 1168 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-27 17:58:49,505 INFO L231 Difference]: Finished difference. Result has 92 places, 107 transitions, 757 flow [2024-06-27 17:58:49,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=757, PETRI_PLACES=92, PETRI_TRANSITIONS=107} [2024-06-27 17:58:49,505 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 30 predicate places. [2024-06-27 17:58:49,506 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 107 transitions, 757 flow [2024-06-27 17:58:49,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 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) [2024-06-27 17:58:49,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:49,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:49,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 17:58:49,506 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:49,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:49,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1516404082, now seen corresponding path program 3 times [2024-06-27 17:58:49,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:49,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149417479] [2024-06-27 17:58:49,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:49,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:49,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:49,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:49,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149417479] [2024-06-27 17:58:49,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149417479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:49,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:49,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:49,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188222493] [2024-06-27 17:58:49,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:49,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:49,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:49,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:49,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:49,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 56 [2024-06-27 17:58:49,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 107 transitions, 757 flow. Second operand has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 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) [2024-06-27 17:58:49,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:49,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 56 [2024-06-27 17:58:49,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:50,690 INFO L124 PetriNetUnfolderBase]: 8682/13169 cut-off events. [2024-06-27 17:58:50,690 INFO L125 PetriNetUnfolderBase]: For 47900/48142 co-relation queries the response was YES. [2024-06-27 17:58:50,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46137 conditions, 13169 events. 8682/13169 cut-off events. For 47900/48142 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 84705 event pairs, 4334 based on Foata normal form. 65/13130 useless extension candidates. Maximal degree in co-relation 46106. Up to 11558 conditions per place. [2024-06-27 17:58:50,757 INFO L140 encePairwiseOnDemand]: 45/56 looper letters, 101 selfloop transitions, 25 changer transitions 0/142 dead transitions. [2024-06-27 17:58:50,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 142 transitions, 1098 flow [2024-06-27 17:58:50,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:58:50,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:58:50,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 190 transitions. [2024-06-27 17:58:50,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-06-27 17:58:50,758 INFO L175 Difference]: Start difference. First operand has 92 places, 107 transitions, 757 flow. Second operand 5 states and 190 transitions. [2024-06-27 17:58:50,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 142 transitions, 1098 flow [2024-06-27 17:58:50,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 142 transitions, 1006 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 17:58:50,801 INFO L231 Difference]: Finished difference. Result has 93 places, 107 transitions, 726 flow [2024-06-27 17:58:50,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=726, PETRI_PLACES=93, PETRI_TRANSITIONS=107} [2024-06-27 17:58:50,802 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 31 predicate places. [2024-06-27 17:58:50,802 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 107 transitions, 726 flow [2024-06-27 17:58:50,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 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) [2024-06-27 17:58:50,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:50,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:50,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 17:58:50,803 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:50,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:50,803 INFO L85 PathProgramCache]: Analyzing trace with hash -28089719, now seen corresponding path program 1 times [2024-06-27 17:58:50,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:50,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363976931] [2024-06-27 17:58:50,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:50,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:50,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:50,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:50,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:50,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363976931] [2024-06-27 17:58:50,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363976931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:50,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:50,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:58:50,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560269416] [2024-06-27 17:58:50,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:50,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:58:50,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:50,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:58:50,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:58:50,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-06-27 17:58:50,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 107 transitions, 726 flow. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 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) [2024-06-27 17:58:50,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:50,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-06-27 17:58:50,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:51,951 INFO L124 PetriNetUnfolderBase]: 8082/12251 cut-off events. [2024-06-27 17:58:51,951 INFO L125 PetriNetUnfolderBase]: For 51710/51769 co-relation queries the response was YES. [2024-06-27 17:58:51,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43838 conditions, 12251 events. 8082/12251 cut-off events. For 51710/51769 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 80706 event pairs, 4629 based on Foata normal form. 63/12205 useless extension candidates. Maximal degree in co-relation 43806. Up to 10776 conditions per place. [2024-06-27 17:58:52,018 INFO L140 encePairwiseOnDemand]: 48/56 looper letters, 104 selfloop transitions, 14 changer transitions 0/139 dead transitions. [2024-06-27 17:58:52,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 139 transitions, 1118 flow [2024-06-27 17:58:52,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:58:52,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:58:52,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 148 transitions. [2024-06-27 17:58:52,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2024-06-27 17:58:52,019 INFO L175 Difference]: Start difference. First operand has 93 places, 107 transitions, 726 flow. Second operand 4 states and 148 transitions. [2024-06-27 17:58:52,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 139 transitions, 1118 flow [2024-06-27 17:58:52,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 139 transitions, 1062 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 17:58:52,057 INFO L231 Difference]: Finished difference. Result has 94 places, 120 transitions, 849 flow [2024-06-27 17:58:52,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=849, PETRI_PLACES=94, PETRI_TRANSITIONS=120} [2024-06-27 17:58:52,057 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 32 predicate places. [2024-06-27 17:58:52,057 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 120 transitions, 849 flow [2024-06-27 17:58:52,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 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) [2024-06-27 17:58:52,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:52,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:52,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 17:58:52,058 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:52,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:52,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1682140389, now seen corresponding path program 1 times [2024-06-27 17:58:52,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:52,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485464829] [2024-06-27 17:58:52,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:52,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:52,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:52,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:52,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:52,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485464829] [2024-06-27 17:58:52,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485464829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:52,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:52,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:52,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001720401] [2024-06-27 17:58:52,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:52,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:52,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:52,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:52,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:52,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-06-27 17:58:52,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 120 transitions, 849 flow. Second operand has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 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) [2024-06-27 17:58:52,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:52,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-06-27 17:58:52,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:53,346 INFO L124 PetriNetUnfolderBase]: 9764/14073 cut-off events. [2024-06-27 17:58:53,346 INFO L125 PetriNetUnfolderBase]: For 83625/84004 co-relation queries the response was YES. [2024-06-27 17:58:53,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57775 conditions, 14073 events. 9764/14073 cut-off events. For 83625/84004 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 87996 event pairs, 2532 based on Foata normal form. 102/13821 useless extension candidates. Maximal degree in co-relation 57741. Up to 12559 conditions per place. [2024-06-27 17:58:53,425 INFO L140 encePairwiseOnDemand]: 46/56 looper letters, 98 selfloop transitions, 49 changer transitions 0/174 dead transitions. [2024-06-27 17:58:53,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 174 transitions, 1391 flow [2024-06-27 17:58:53,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:53,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:53,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 231 transitions. [2024-06-27 17:58:53,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-06-27 17:58:53,427 INFO L175 Difference]: Start difference. First operand has 94 places, 120 transitions, 849 flow. Second operand 6 states and 231 transitions. [2024-06-27 17:58:53,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 174 transitions, 1391 flow [2024-06-27 17:58:53,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 174 transitions, 1381 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-27 17:58:53,492 INFO L231 Difference]: Finished difference. Result has 100 places, 126 transitions, 1021 flow [2024-06-27 17:58:53,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=839, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1021, PETRI_PLACES=100, PETRI_TRANSITIONS=126} [2024-06-27 17:58:53,493 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 38 predicate places. [2024-06-27 17:58:53,493 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 126 transitions, 1021 flow [2024-06-27 17:58:53,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 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) [2024-06-27 17:58:53,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:53,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:53,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 17:58:53,494 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:53,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:53,494 INFO L85 PathProgramCache]: Analyzing trace with hash 93665765, now seen corresponding path program 2 times [2024-06-27 17:58:53,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:53,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078877771] [2024-06-27 17:58:53,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:53,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:53,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:53,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:53,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078877771] [2024-06-27 17:58:53,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078877771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:53,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:53,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:53,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109868628] [2024-06-27 17:58:53,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:53,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:53,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:53,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:53,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:53,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-06-27 17:58:53,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 126 transitions, 1021 flow. Second operand has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 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) [2024-06-27 17:58:53,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:53,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-06-27 17:58:53,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:55,100 INFO L124 PetriNetUnfolderBase]: 9848/14177 cut-off events. [2024-06-27 17:58:55,101 INFO L125 PetriNetUnfolderBase]: For 105628/106122 co-relation queries the response was YES. [2024-06-27 17:58:55,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61935 conditions, 14177 events. 9848/14177 cut-off events. For 105628/106122 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 88619 event pairs, 3138 based on Foata normal form. 131/13936 useless extension candidates. Maximal degree in co-relation 61898. Up to 12847 conditions per place. [2024-06-27 17:58:55,177 INFO L140 encePairwiseOnDemand]: 46/56 looper letters, 101 selfloop transitions, 45 changer transitions 0/173 dead transitions. [2024-06-27 17:58:55,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 173 transitions, 1461 flow [2024-06-27 17:58:55,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:55,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:55,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 227 transitions. [2024-06-27 17:58:55,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6755952380952381 [2024-06-27 17:58:55,178 INFO L175 Difference]: Start difference. First operand has 100 places, 126 transitions, 1021 flow. Second operand 6 states and 227 transitions. [2024-06-27 17:58:55,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 173 transitions, 1461 flow [2024-06-27 17:58:55,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 173 transitions, 1377 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-27 17:58:55,260 INFO L231 Difference]: Finished difference. Result has 104 places, 129 transitions, 1084 flow [2024-06-27 17:58:55,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=943, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1084, PETRI_PLACES=104, PETRI_TRANSITIONS=129} [2024-06-27 17:58:55,261 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 42 predicate places. [2024-06-27 17:58:55,261 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 129 transitions, 1084 flow [2024-06-27 17:58:55,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 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) [2024-06-27 17:58:55,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:55,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:55,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 17:58:55,262 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:55,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:55,262 INFO L85 PathProgramCache]: Analyzing trace with hash -236117083, now seen corresponding path program 3 times [2024-06-27 17:58:55,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:55,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126391989] [2024-06-27 17:58:55,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:55,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:55,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:55,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:55,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126391989] [2024-06-27 17:58:55,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126391989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:55,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:55,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:55,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851861358] [2024-06-27 17:58:55,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:55,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:55,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:55,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:55,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:55,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-06-27 17:58:55,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 129 transitions, 1084 flow. Second operand has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 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) [2024-06-27 17:58:55,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:55,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-06-27 17:58:55,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:56,556 INFO L124 PetriNetUnfolderBase]: 9816/14148 cut-off events. [2024-06-27 17:58:56,556 INFO L125 PetriNetUnfolderBase]: For 113320/113806 co-relation queries the response was YES. [2024-06-27 17:58:56,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62401 conditions, 14148 events. 9816/14148 cut-off events. For 113320/113806 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 88598 event pairs, 2522 based on Foata normal form. 182/13967 useless extension candidates. Maximal degree in co-relation 62362. Up to 12769 conditions per place. [2024-06-27 17:58:56,647 INFO L140 encePairwiseOnDemand]: 46/56 looper letters, 96 selfloop transitions, 41 changer transitions 0/164 dead transitions. [2024-06-27 17:58:56,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 164 transitions, 1444 flow [2024-06-27 17:58:56,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:58:56,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:58:56,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 193 transitions. [2024-06-27 17:58:56,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6892857142857143 [2024-06-27 17:58:56,648 INFO L175 Difference]: Start difference. First operand has 104 places, 129 transitions, 1084 flow. Second operand 5 states and 193 transitions. [2024-06-27 17:58:56,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 164 transitions, 1444 flow [2024-06-27 17:58:56,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 164 transitions, 1327 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 17:58:56,910 INFO L231 Difference]: Finished difference. Result has 105 places, 129 transitions, 1065 flow [2024-06-27 17:58:56,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=967, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1065, PETRI_PLACES=105, PETRI_TRANSITIONS=129} [2024-06-27 17:58:56,911 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 43 predicate places. [2024-06-27 17:58:56,911 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 129 transitions, 1065 flow [2024-06-27 17:58:56,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 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) [2024-06-27 17:58:56,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:56,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:56,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 17:58:56,912 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:56,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:56,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1479892781, now seen corresponding path program 1 times [2024-06-27 17:58:56,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:56,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998271389] [2024-06-27 17:58:56,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:56,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:56,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:57,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:57,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:57,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998271389] [2024-06-27 17:58:57,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998271389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:57,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:57,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:57,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857769016] [2024-06-27 17:58:57,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:57,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:57,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:57,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:57,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:57,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 56 [2024-06-27 17:58:57,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 129 transitions, 1065 flow. Second operand has 8 states, 8 states have (on average 22.5) internal successors, (180), 8 states have internal predecessors, (180), 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) [2024-06-27 17:58:57,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:57,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 56 [2024-06-27 17:58:57,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:58,455 INFO L124 PetriNetUnfolderBase]: 10797/16136 cut-off events. [2024-06-27 17:58:58,456 INFO L125 PetriNetUnfolderBase]: For 118272/118671 co-relation queries the response was YES. [2024-06-27 17:58:58,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67524 conditions, 16136 events. 10797/16136 cut-off events. For 118272/118671 co-relation queries the response was YES. Maximal size of possible extension queue 726. Compared 105347 event pairs, 3748 based on Foata normal form. 157/16144 useless extension candidates. Maximal degree in co-relation 67484. Up to 13604 conditions per place. [2024-06-27 17:58:58,591 INFO L140 encePairwiseOnDemand]: 45/56 looper letters, 145 selfloop transitions, 43 changer transitions 0/206 dead transitions. [2024-06-27 17:58:58,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 206 transitions, 1819 flow [2024-06-27 17:58:58,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:58,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:58,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 266 transitions. [2024-06-27 17:58:58,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-06-27 17:58:58,593 INFO L175 Difference]: Start difference. First operand has 105 places, 129 transitions, 1065 flow. Second operand 7 states and 266 transitions. [2024-06-27 17:58:58,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 206 transitions, 1819 flow [2024-06-27 17:58:58,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 206 transitions, 1712 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 17:58:58,703 INFO L231 Difference]: Finished difference. Result has 110 places, 140 transitions, 1205 flow [2024-06-27 17:58:58,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1205, PETRI_PLACES=110, PETRI_TRANSITIONS=140} [2024-06-27 17:58:58,704 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 48 predicate places. [2024-06-27 17:58:58,704 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 140 transitions, 1205 flow [2024-06-27 17:58:58,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.5) internal successors, (180), 8 states have internal predecessors, (180), 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) [2024-06-27 17:58:58,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:58,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:58,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 17:58:58,705 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:58,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:58,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1391179151, now seen corresponding path program 2 times [2024-06-27 17:58:58,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:58,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510921437] [2024-06-27 17:58:58,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:58,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:58,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:58,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:58,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510921437] [2024-06-27 17:58:58,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510921437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:58,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:58,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:58,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680916992] [2024-06-27 17:58:58,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:58,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:58,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:58,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:58,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:58,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 56 [2024-06-27 17:58:58,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 140 transitions, 1205 flow. Second operand has 8 states, 8 states have (on average 22.5) internal successors, (180), 8 states have internal predecessors, (180), 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) [2024-06-27 17:58:58,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:58,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 56 [2024-06-27 17:58:58,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:00,347 INFO L124 PetriNetUnfolderBase]: 10977/15774 cut-off events. [2024-06-27 17:59:00,347 INFO L125 PetriNetUnfolderBase]: For 135564/136157 co-relation queries the response was YES. [2024-06-27 17:59:00,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70711 conditions, 15774 events. 10977/15774 cut-off events. For 135564/136157 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 98525 event pairs, 3331 based on Foata normal form. 205/15898 useless extension candidates. Maximal degree in co-relation 70668. Up to 14386 conditions per place. [2024-06-27 17:59:00,449 INFO L140 encePairwiseOnDemand]: 45/56 looper letters, 145 selfloop transitions, 36 changer transitions 0/199 dead transitions. [2024-06-27 17:59:00,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 199 transitions, 1748 flow [2024-06-27 17:59:00,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:59:00,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:59:00,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 260 transitions. [2024-06-27 17:59:00,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6632653061224489 [2024-06-27 17:59:00,450 INFO L175 Difference]: Start difference. First operand has 110 places, 140 transitions, 1205 flow. Second operand 7 states and 260 transitions. [2024-06-27 17:59:00,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 199 transitions, 1748 flow [2024-06-27 17:59:00,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 199 transitions, 1689 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 17:59:00,577 INFO L231 Difference]: Finished difference. Result has 115 places, 142 transitions, 1262 flow [2024-06-27 17:59:00,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1262, PETRI_PLACES=115, PETRI_TRANSITIONS=142} [2024-06-27 17:59:00,578 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 53 predicate places. [2024-06-27 17:59:00,578 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 142 transitions, 1262 flow [2024-06-27 17:59:00,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.5) internal successors, (180), 8 states have internal predecessors, (180), 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) [2024-06-27 17:59:00,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:00,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:00,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 17:59:00,578 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:00,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:00,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1391327021, now seen corresponding path program 3 times [2024-06-27 17:59:00,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:00,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404606103] [2024-06-27 17:59:00,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:00,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:00,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:00,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:00,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:00,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404606103] [2024-06-27 17:59:00,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404606103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:00,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:00,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:00,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684927172] [2024-06-27 17:59:00,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:00,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:00,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:00,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:00,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:00,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 56 [2024-06-27 17:59:00,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 142 transitions, 1262 flow. Second operand has 8 states, 8 states have (on average 22.5) internal successors, (180), 8 states have internal predecessors, (180), 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) [2024-06-27 17:59:00,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:00,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 56 [2024-06-27 17:59:00,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:02,294 INFO L124 PetriNetUnfolderBase]: 11107/15964 cut-off events. [2024-06-27 17:59:02,294 INFO L125 PetriNetUnfolderBase]: For 147850/148443 co-relation queries the response was YES. [2024-06-27 17:59:02,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72775 conditions, 15964 events. 11107/15964 cut-off events. For 147850/148443 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 99965 event pairs, 3314 based on Foata normal form. 199/16082 useless extension candidates. Maximal degree in co-relation 72730. Up to 14394 conditions per place. [2024-06-27 17:59:02,403 INFO L140 encePairwiseOnDemand]: 45/56 looper letters, 148 selfloop transitions, 40 changer transitions 0/206 dead transitions. [2024-06-27 17:59:02,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 206 transitions, 1849 flow [2024-06-27 17:59:02,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:59:02,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:59:02,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 263 transitions. [2024-06-27 17:59:02,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6709183673469388 [2024-06-27 17:59:02,405 INFO L175 Difference]: Start difference. First operand has 115 places, 142 transitions, 1262 flow. Second operand 7 states and 263 transitions. [2024-06-27 17:59:02,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 206 transitions, 1849 flow [2024-06-27 17:59:02,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 206 transitions, 1767 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 17:59:02,571 INFO L231 Difference]: Finished difference. Result has 118 places, 146 transitions, 1333 flow [2024-06-27 17:59:02,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1333, PETRI_PLACES=118, PETRI_TRANSITIONS=146} [2024-06-27 17:59:02,571 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 56 predicate places. [2024-06-27 17:59:02,571 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 146 transitions, 1333 flow [2024-06-27 17:59:02,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.5) internal successors, (180), 8 states have internal predecessors, (180), 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) [2024-06-27 17:59:02,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:02,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:02,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 17:59:02,572 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:02,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:02,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1275816829, now seen corresponding path program 4 times [2024-06-27 17:59:02,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:02,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100189791] [2024-06-27 17:59:02,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:02,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:02,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:02,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:02,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:02,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100189791] [2024-06-27 17:59:02,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100189791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:02,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:02,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:02,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956435541] [2024-06-27 17:59:02,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:02,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:02,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:02,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:02,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:02,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 56 [2024-06-27 17:59:02,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 146 transitions, 1333 flow. Second operand has 8 states, 8 states have (on average 22.5) internal successors, (180), 8 states have internal predecessors, (180), 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) [2024-06-27 17:59:02,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:02,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 56 [2024-06-27 17:59:02,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:04,333 INFO L124 PetriNetUnfolderBase]: 11050/15907 cut-off events. [2024-06-27 17:59:04,334 INFO L125 PetriNetUnfolderBase]: For 158747/159418 co-relation queries the response was YES. [2024-06-27 17:59:04,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73190 conditions, 15907 events. 11050/15907 cut-off events. For 158747/159418 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 99286 event pairs, 3317 based on Foata normal form. 230/16074 useless extension candidates. Maximal degree in co-relation 73143. Up to 14572 conditions per place. [2024-06-27 17:59:04,447 INFO L140 encePairwiseOnDemand]: 45/56 looper letters, 166 selfloop transitions, 31 changer transitions 0/215 dead transitions. [2024-06-27 17:59:04,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 215 transitions, 1940 flow [2024-06-27 17:59:04,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:04,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:04,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 293 transitions. [2024-06-27 17:59:04,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6540178571428571 [2024-06-27 17:59:04,449 INFO L175 Difference]: Start difference. First operand has 118 places, 146 transitions, 1333 flow. Second operand 8 states and 293 transitions. [2024-06-27 17:59:04,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 215 transitions, 1940 flow [2024-06-27 17:59:04,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 215 transitions, 1879 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 17:59:04,623 INFO L231 Difference]: Finished difference. Result has 123 places, 148 transitions, 1386 flow [2024-06-27 17:59:04,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=1272, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1386, PETRI_PLACES=123, PETRI_TRANSITIONS=148} [2024-06-27 17:59:04,624 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 61 predicate places. [2024-06-27 17:59:04,624 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 148 transitions, 1386 flow [2024-06-27 17:59:04,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.5) internal successors, (180), 8 states have internal predecessors, (180), 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) [2024-06-27 17:59:04,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:04,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:04,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 17:59:04,625 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:04,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:04,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1270454449, now seen corresponding path program 5 times [2024-06-27 17:59:04,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:04,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586198761] [2024-06-27 17:59:04,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:04,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:04,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:04,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:04,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:04,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586198761] [2024-06-27 17:59:04,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586198761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:04,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:04,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:04,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63960026] [2024-06-27 17:59:04,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:04,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:04,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:04,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:04,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:04,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 56 [2024-06-27 17:59:04,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 148 transitions, 1386 flow. Second operand has 8 states, 8 states have (on average 22.5) internal successors, (180), 8 states have internal predecessors, (180), 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) [2024-06-27 17:59:04,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:04,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 56 [2024-06-27 17:59:04,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:06,412 INFO L124 PetriNetUnfolderBase]: 11376/16739 cut-off events. [2024-06-27 17:59:06,413 INFO L125 PetriNetUnfolderBase]: For 177680/178069 co-relation queries the response was YES. [2024-06-27 17:59:06,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77088 conditions, 16739 events. 11376/16739 cut-off events. For 177680/178069 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 108677 event pairs, 4631 based on Foata normal form. 131/16763 useless extension candidates. Maximal degree in co-relation 77039. Up to 15009 conditions per place. [2024-06-27 17:59:06,527 INFO L140 encePairwiseOnDemand]: 45/56 looper letters, 151 selfloop transitions, 29 changer transitions 0/198 dead transitions. [2024-06-27 17:59:06,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 198 transitions, 1917 flow [2024-06-27 17:59:06,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:59:06,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:59:06,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 226 transitions. [2024-06-27 17:59:06,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6726190476190477 [2024-06-27 17:59:06,528 INFO L175 Difference]: Start difference. First operand has 123 places, 148 transitions, 1386 flow. Second operand 6 states and 226 transitions. [2024-06-27 17:59:06,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 198 transitions, 1917 flow [2024-06-27 17:59:06,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 198 transitions, 1839 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 17:59:06,712 INFO L231 Difference]: Finished difference. Result has 123 places, 150 transitions, 1422 flow [2024-06-27 17:59:06,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=1308, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1422, PETRI_PLACES=123, PETRI_TRANSITIONS=150} [2024-06-27 17:59:06,712 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 61 predicate places. [2024-06-27 17:59:06,712 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 150 transitions, 1422 flow [2024-06-27 17:59:06,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.5) internal successors, (180), 8 states have internal predecessors, (180), 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) [2024-06-27 17:59:06,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:06,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:06,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 17:59:06,713 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:06,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:06,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1270306579, now seen corresponding path program 6 times [2024-06-27 17:59:06,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:06,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519983594] [2024-06-27 17:59:06,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:06,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:06,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:06,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:06,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:06,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519983594] [2024-06-27 17:59:06,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519983594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:06,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:06,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:06,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948305558] [2024-06-27 17:59:06,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:06,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:06,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:06,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:06,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:06,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 56 [2024-06-27 17:59:06,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 150 transitions, 1422 flow. Second operand has 8 states, 8 states have (on average 22.5) internal successors, (180), 8 states have internal predecessors, (180), 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) [2024-06-27 17:59:06,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:06,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 56 [2024-06-27 17:59:06,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:08,712 INFO L124 PetriNetUnfolderBase]: 11337/16318 cut-off events. [2024-06-27 17:59:08,712 INFO L125 PetriNetUnfolderBase]: For 180944/181553 co-relation queries the response was YES. [2024-06-27 17:59:08,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76312 conditions, 16318 events. 11337/16318 cut-off events. For 180944/181553 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 102343 event pairs, 2746 based on Foata normal form. 227/16468 useless extension candidates. Maximal degree in co-relation 76262. Up to 14476 conditions per place. [2024-06-27 17:59:08,818 INFO L140 encePairwiseOnDemand]: 45/56 looper letters, 148 selfloop transitions, 37 changer transitions 0/203 dead transitions. [2024-06-27 17:59:08,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 203 transitions, 1953 flow [2024-06-27 17:59:08,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:59:08,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:59:08,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 229 transitions. [2024-06-27 17:59:08,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6815476190476191 [2024-06-27 17:59:08,819 INFO L175 Difference]: Start difference. First operand has 123 places, 150 transitions, 1422 flow. Second operand 6 states and 229 transitions. [2024-06-27 17:59:08,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 203 transitions, 1953 flow [2024-06-27 17:59:09,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 203 transitions, 1867 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 17:59:09,028 INFO L231 Difference]: Finished difference. Result has 126 places, 152 transitions, 1458 flow [2024-06-27 17:59:09,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=1338, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1458, PETRI_PLACES=126, PETRI_TRANSITIONS=152} [2024-06-27 17:59:09,028 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 64 predicate places. [2024-06-27 17:59:09,029 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 152 transitions, 1458 flow [2024-06-27 17:59:09,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.5) internal successors, (180), 8 states have internal predecessors, (180), 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) [2024-06-27 17:59:09,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:09,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:09,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 17:59:09,029 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:09,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:09,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1276032031, now seen corresponding path program 1 times [2024-06-27 17:59:09,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:09,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570423463] [2024-06-27 17:59:09,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:09,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:09,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:09,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:09,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570423463] [2024-06-27 17:59:09,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570423463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:09,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:09,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:59:09,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053029269] [2024-06-27 17:59:09,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:09,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:59:09,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:09,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:59:09,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:59:09,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 56 [2024-06-27 17:59:09,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 152 transitions, 1458 flow. Second operand has 8 states, 8 states have (on average 22.5) internal successors, (180), 8 states have internal predecessors, (180), 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) [2024-06-27 17:59:09,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:09,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 56 [2024-06-27 17:59:09,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:10,671 INFO L124 PetriNetUnfolderBase]: 11087/15974 cut-off events. [2024-06-27 17:59:10,671 INFO L125 PetriNetUnfolderBase]: For 185340/185979 co-relation queries the response was YES. [2024-06-27 17:59:10,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74913 conditions, 15974 events. 11087/15974 cut-off events. For 185340/185979 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 99924 event pairs, 3102 based on Foata normal form. 240/16149 useless extension candidates. Maximal degree in co-relation 74861. Up to 14195 conditions per place. [2024-06-27 17:59:10,788 INFO L140 encePairwiseOnDemand]: 45/56 looper letters, 168 selfloop transitions, 38 changer transitions 0/224 dead transitions. [2024-06-27 17:59:10,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 224 transitions, 2047 flow [2024-06-27 17:59:10,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:59:10,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:59:10,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 295 transitions. [2024-06-27 17:59:10,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6584821428571429 [2024-06-27 17:59:10,789 INFO L175 Difference]: Start difference. First operand has 126 places, 152 transitions, 1458 flow. Second operand 8 states and 295 transitions. [2024-06-27 17:59:10,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 224 transitions, 2047 flow [2024-06-27 17:59:11,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 224 transitions, 1906 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 17:59:11,312 INFO L231 Difference]: Finished difference. Result has 128 places, 153 transitions, 1392 flow [2024-06-27 17:59:11,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=1277, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1392, PETRI_PLACES=128, PETRI_TRANSITIONS=153} [2024-06-27 17:59:11,312 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 66 predicate places. [2024-06-27 17:59:11,313 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 153 transitions, 1392 flow [2024-06-27 17:59:11,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.5) internal successors, (180), 8 states have internal predecessors, (180), 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) [2024-06-27 17:59:11,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:11,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:11,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 17:59:11,313 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:11,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:11,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1822596334, now seen corresponding path program 1 times [2024-06-27 17:59:11,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:11,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838839900] [2024-06-27 17:59:11,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:11,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:11,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:11,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:11,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838839900] [2024-06-27 17:59:11,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838839900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:11,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:11,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:59:11,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139111322] [2024-06-27 17:59:11,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:11,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:59:11,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:11,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:59:11,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:59:11,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-06-27 17:59:11,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 153 transitions, 1392 flow. Second operand has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 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) [2024-06-27 17:59:11,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:11,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-06-27 17:59:11,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:12,651 INFO L124 PetriNetUnfolderBase]: 9016/13068 cut-off events. [2024-06-27 17:59:12,652 INFO L125 PetriNetUnfolderBase]: For 162142/162641 co-relation queries the response was YES. [2024-06-27 17:59:12,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63392 conditions, 13068 events. 9016/13068 cut-off events. For 162142/162641 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 81126 event pairs, 2905 based on Foata normal form. 60/13093 useless extension candidates. Maximal degree in co-relation 63340. Up to 12186 conditions per place. [2024-06-27 17:59:12,760 INFO L140 encePairwiseOnDemand]: 47/56 looper letters, 138 selfloop transitions, 33 changer transitions 0/190 dead transitions. [2024-06-27 17:59:12,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 190 transitions, 1988 flow [2024-06-27 17:59:12,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:59:12,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:59:12,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 186 transitions. [2024-06-27 17:59:12,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6642857142857143 [2024-06-27 17:59:12,762 INFO L175 Difference]: Start difference. First operand has 128 places, 153 transitions, 1392 flow. Second operand 5 states and 186 transitions. [2024-06-27 17:59:12,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 190 transitions, 1988 flow [2024-06-27 17:59:12,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 190 transitions, 1899 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 17:59:12,933 INFO L231 Difference]: Finished difference. Result has 127 places, 161 transitions, 1486 flow [2024-06-27 17:59:12,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=1303, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1486, PETRI_PLACES=127, PETRI_TRANSITIONS=161} [2024-06-27 17:59:12,933 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 65 predicate places. [2024-06-27 17:59:12,933 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 161 transitions, 1486 flow [2024-06-27 17:59:12,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 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) [2024-06-27 17:59:12,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:12,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:12,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 17:59:12,934 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:12,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:12,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1856879854, now seen corresponding path program 2 times [2024-06-27 17:59:12,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:12,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353113689] [2024-06-27 17:59:12,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:12,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:13,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:13,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353113689] [2024-06-27 17:59:13,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353113689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:13,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:13,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:59:13,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445141110] [2024-06-27 17:59:13,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:13,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:59:13,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:13,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:59:13,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:59:13,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-06-27 17:59:13,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 161 transitions, 1486 flow. Second operand has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 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) [2024-06-27 17:59:13,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:13,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-06-27 17:59:13,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:14,444 INFO L124 PetriNetUnfolderBase]: 9009/13069 cut-off events. [2024-06-27 17:59:14,445 INFO L125 PetriNetUnfolderBase]: For 181341/181896 co-relation queries the response was YES. [2024-06-27 17:59:14,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65636 conditions, 13069 events. 9009/13069 cut-off events. For 181341/181896 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 81226 event pairs, 2905 based on Foata normal form. 64/13099 useless extension candidates. Maximal degree in co-relation 65583. Up to 12192 conditions per place. [2024-06-27 17:59:14,544 INFO L140 encePairwiseOnDemand]: 47/56 looper letters, 134 selfloop transitions, 29 changer transitions 0/182 dead transitions. [2024-06-27 17:59:14,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 182 transitions, 1864 flow [2024-06-27 17:59:14,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:59:14,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:59:14,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-06-27 17:59:14,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-06-27 17:59:14,545 INFO L175 Difference]: Start difference. First operand has 127 places, 161 transitions, 1486 flow. Second operand 4 states and 152 transitions. [2024-06-27 17:59:14,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 182 transitions, 1864 flow [2024-06-27 17:59:14,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 182 transitions, 1771 flow, removed 36 selfloop flow, removed 1 redundant places. [2024-06-27 17:59:14,779 INFO L231 Difference]: Finished difference. Result has 130 places, 161 transitions, 1467 flow [2024-06-27 17:59:14,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=1393, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1467, PETRI_PLACES=130, PETRI_TRANSITIONS=161} [2024-06-27 17:59:14,779 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 68 predicate places. [2024-06-27 17:59:14,779 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 161 transitions, 1467 flow [2024-06-27 17:59:14,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 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) [2024-06-27 17:59:14,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:14,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:14,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 17:59:14,780 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:14,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:14,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1542049830, now seen corresponding path program 1 times [2024-06-27 17:59:14,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:14,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530502474] [2024-06-27 17:59:14,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:14,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:14,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:14,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:14,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:14,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530502474] [2024-06-27 17:59:14,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530502474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:14,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:14,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:59:14,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648825877] [2024-06-27 17:59:14,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:14,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:59:14,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:14,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:59:14,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:59:14,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-06-27 17:59:14,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 161 transitions, 1467 flow. Second operand has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 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) [2024-06-27 17:59:14,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:14,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-06-27 17:59:14,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:16,129 INFO L124 PetriNetUnfolderBase]: 9534/13813 cut-off events. [2024-06-27 17:59:16,129 INFO L125 PetriNetUnfolderBase]: For 181831/181936 co-relation queries the response was YES. [2024-06-27 17:59:16,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65577 conditions, 13813 events. 9534/13813 cut-off events. For 181831/181936 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 87582 event pairs, 3412 based on Foata normal form. 113/13893 useless extension candidates. Maximal degree in co-relation 65522. Up to 12775 conditions per place. [2024-06-27 17:59:16,452 INFO L140 encePairwiseOnDemand]: 48/56 looper letters, 151 selfloop transitions, 17 changer transitions 0/190 dead transitions. [2024-06-27 17:59:16,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 190 transitions, 1895 flow [2024-06-27 17:59:16,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:59:16,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:59:16,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 179 transitions. [2024-06-27 17:59:16,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6392857142857142 [2024-06-27 17:59:16,458 INFO L175 Difference]: Start difference. First operand has 130 places, 161 transitions, 1467 flow. Second operand 5 states and 179 transitions. [2024-06-27 17:59:16,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 190 transitions, 1895 flow [2024-06-27 17:59:16,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 190 transitions, 1837 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 17:59:16,630 INFO L231 Difference]: Finished difference. Result has 132 places, 164 transitions, 1483 flow [2024-06-27 17:59:16,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1483, PETRI_PLACES=132, PETRI_TRANSITIONS=164} [2024-06-27 17:59:16,630 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 70 predicate places. [2024-06-27 17:59:16,630 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 164 transitions, 1483 flow [2024-06-27 17:59:16,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 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) [2024-06-27 17:59:16,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:16,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:16,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 17:59:16,631 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:16,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:16,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1714996308, now seen corresponding path program 1 times [2024-06-27 17:59:16,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:16,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718307527] [2024-06-27 17:59:16,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:16,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:16,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:16,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:16,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718307527] [2024-06-27 17:59:16,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718307527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:16,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:16,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:59:16,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870049772] [2024-06-27 17:59:16,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:16,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:59:16,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:16,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:59:16,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:59:16,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 56 [2024-06-27 17:59:16,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 164 transitions, 1483 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 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) [2024-06-27 17:59:16,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:16,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 56 [2024-06-27 17:59:16,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:18,391 INFO L124 PetriNetUnfolderBase]: 12199/17480 cut-off events. [2024-06-27 17:59:18,391 INFO L125 PetriNetUnfolderBase]: For 235393/235408 co-relation queries the response was YES. [2024-06-27 17:59:18,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83322 conditions, 17480 events. 12199/17480 cut-off events. For 235393/235408 co-relation queries the response was YES. Maximal size of possible extension queue 768. Compared 109620 event pairs, 3943 based on Foata normal form. 10/17472 useless extension candidates. Maximal degree in co-relation 83266. Up to 16339 conditions per place. [2024-06-27 17:59:18,534 INFO L140 encePairwiseOnDemand]: 46/56 looper letters, 187 selfloop transitions, 26 changer transitions 0/228 dead transitions. [2024-06-27 17:59:18,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 228 transitions, 2307 flow [2024-06-27 17:59:18,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:59:18,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:59:18,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 213 transitions. [2024-06-27 17:59:18,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6339285714285714 [2024-06-27 17:59:18,535 INFO L175 Difference]: Start difference. First operand has 132 places, 164 transitions, 1483 flow. Second operand 6 states and 213 transitions. [2024-06-27 17:59:18,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 228 transitions, 2307 flow [2024-06-27 17:59:18,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 228 transitions, 2250 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 17:59:18,845 INFO L231 Difference]: Finished difference. Result has 138 places, 187 transitions, 1736 flow [2024-06-27 17:59:18,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=1433, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1736, PETRI_PLACES=138, PETRI_TRANSITIONS=187} [2024-06-27 17:59:18,845 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 76 predicate places. [2024-06-27 17:59:18,845 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 187 transitions, 1736 flow [2024-06-27 17:59:18,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 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) [2024-06-27 17:59:18,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:18,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:18,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 17:59:18,846 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:18,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:18,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1151665306, now seen corresponding path program 2 times [2024-06-27 17:59:18,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:18,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985005458] [2024-06-27 17:59:18,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:18,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:18,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:18,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:18,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985005458] [2024-06-27 17:59:18,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985005458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:18,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:18,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:59:18,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085942905] [2024-06-27 17:59:18,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:18,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:59:18,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:18,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:59:18,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:59:19,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 56 [2024-06-27 17:59:19,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 187 transitions, 1736 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 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) [2024-06-27 17:59:19,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:19,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 56 [2024-06-27 17:59:19,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:20,819 INFO L124 PetriNetUnfolderBase]: 12223/17610 cut-off events. [2024-06-27 17:59:20,819 INFO L125 PetriNetUnfolderBase]: For 256582/256586 co-relation queries the response was YES. [2024-06-27 17:59:20,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86913 conditions, 17610 events. 12223/17610 cut-off events. For 256582/256586 co-relation queries the response was YES. Maximal size of possible extension queue 778. Compared 111547 event pairs, 5360 based on Foata normal form. 6/17563 useless extension candidates. Maximal degree in co-relation 86853. Up to 16364 conditions per place. [2024-06-27 17:59:20,954 INFO L140 encePairwiseOnDemand]: 47/56 looper letters, 177 selfloop transitions, 30 changer transitions 0/222 dead transitions. [2024-06-27 17:59:20,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 222 transitions, 2378 flow [2024-06-27 17:59:20,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:59:20,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:59:20,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 177 transitions. [2024-06-27 17:59:20,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6321428571428571 [2024-06-27 17:59:20,955 INFO L175 Difference]: Start difference. First operand has 138 places, 187 transitions, 1736 flow. Second operand 5 states and 177 transitions. [2024-06-27 17:59:20,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 222 transitions, 2378 flow [2024-06-27 17:59:21,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 222 transitions, 2346 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-27 17:59:21,330 INFO L231 Difference]: Finished difference. Result has 144 places, 193 transitions, 1845 flow [2024-06-27 17:59:21,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=1708, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1845, PETRI_PLACES=144, PETRI_TRANSITIONS=193} [2024-06-27 17:59:21,331 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 82 predicate places. [2024-06-27 17:59:21,331 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 193 transitions, 1845 flow [2024-06-27 17:59:21,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 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) [2024-06-27 17:59:21,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:21,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:21,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 17:59:21,332 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:21,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:21,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1151676466, now seen corresponding path program 3 times [2024-06-27 17:59:21,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:21,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405484265] [2024-06-27 17:59:21,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:21,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:21,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:21,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:21,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405484265] [2024-06-27 17:59:21,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405484265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:21,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:21,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:59:21,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249606950] [2024-06-27 17:59:21,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:21,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:59:21,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:21,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:59:21,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:59:21,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 56 [2024-06-27 17:59:21,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 193 transitions, 1845 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 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) [2024-06-27 17:59:21,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:21,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 56 [2024-06-27 17:59:21,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand