./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe009_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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 11:19:12,269 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 11:19:12,346 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 11:19:12,351 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 11:19:12,352 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 11:19:12,380 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 11:19:12,380 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 11:19:12,381 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 11:19:12,381 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 11:19:12,384 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 11:19:12,384 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 11:19:12,385 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 11:19:12,386 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 11:19:12,386 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 11:19:12,387 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 11:19:12,387 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 11:19:12,387 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 11:19:12,387 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 11:19:12,388 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 11:19:12,388 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 11:19:12,388 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 11:19:12,388 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 11:19:12,389 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 11:19:12,389 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 11:19:12,389 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 11:19:12,389 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 11:19:12,389 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 11:19:12,390 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 11:19:12,390 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 11:19:12,390 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 11:19:12,391 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 11:19:12,391 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 11:19:12,391 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:19:12,392 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 11:19:12,392 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 11:19:12,392 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 11:19:12,392 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 11:19:12,392 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 11:19:12,392 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 11:19:12,393 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 11:19:12,393 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 11:19:12,393 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 11:19:12,393 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 11:19:12,393 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 11:19:12,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 11:19:12,605 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 11:19:12,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 11:19:12,608 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 11:19:12,608 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 11:19:12,609 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 11:19:13,623 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 11:19:13,812 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 11:19:13,813 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 11:19:13,822 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4161e06c6/07cd1e7eef3d470a8ef4c682213dcd2d/FLAG3d130000f [2024-06-14 11:19:13,831 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4161e06c6/07cd1e7eef3d470a8ef4c682213dcd2d [2024-06-14 11:19:13,833 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 11:19:13,834 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 11:19:13,834 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-14 11:19:13,940 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 11:19:13,941 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 11:19:13,942 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 11:19:13,942 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 11:19:13,945 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 11:19:13,946 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:19:13" (1/2) ... [2024-06-14 11:19:13,947 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76c4b283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:19:13, skipping insertion in model container [2024-06-14 11:19:13,947 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:19:13" (1/2) ... [2024-06-14 11:19:13,948 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@69fd98a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:19:13, skipping insertion in model container [2024-06-14 11:19:13,948 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:19:13" (2/2) ... [2024-06-14 11:19:13,949 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76c4b283 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:19:13, skipping insertion in model container [2024-06-14 11:19:13,949 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:19:13" (2/2) ... [2024-06-14 11:19:13,949 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 11:19:13,981 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 11:19:13,982 INFO L97 edCorrectnessWitness]: Location invariant before [L778-L778] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-14 11:19:13,982 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-14 11:19:13,982 INFO L97 edCorrectnessWitness]: Location invariant before [L776-L776] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-14 11:19:13,983 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 11:19:13,983 INFO L106 edCorrectnessWitness]: ghost_update [L774-L774] multithreaded = 1; [2024-06-14 11:19:14,022 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 11:19:14,301 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:19:14,310 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 11:19:14,425 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:19:14,461 INFO L206 MainTranslator]: Completed translation [2024-06-14 11:19:14,461 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:19:14 WrapperNode [2024-06-14 11:19:14,461 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 11:19:14,462 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 11:19:14,462 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 11:19:14,462 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 11:19:14,467 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:19:14" (1/1) ... [2024-06-14 11:19:14,490 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:19:14" (1/1) ... [2024-06-14 11:19:14,529 INFO L138 Inliner]: procedures = 175, calls = 40, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-14 11:19:14,530 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 11:19:14,531 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 11:19:14,531 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 11:19:14,531 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 11:19:14,540 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:19:14" (1/1) ... [2024-06-14 11:19:14,540 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:19:14" (1/1) ... [2024-06-14 11:19:14,544 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:19:14" (1/1) ... [2024-06-14 11:19:14,564 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]. [2024-06-14 11:19:14,564 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:19:14" (1/1) ... [2024-06-14 11:19:14,564 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:19:14" (1/1) ... [2024-06-14 11:19:14,575 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:19:14" (1/1) ... [2024-06-14 11:19:14,577 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:19:14" (1/1) ... [2024-06-14 11:19:14,580 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:19:14" (1/1) ... [2024-06-14 11:19:14,581 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:19:14" (1/1) ... [2024-06-14 11:19:14,587 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 11:19:14,588 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 11:19:14,588 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 11:19:14,588 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 11:19:14,589 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:19:14" (1/1) ... [2024-06-14 11:19:14,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:19:14,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 11:19:14,614 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) [2024-06-14 11:19:14,632 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 [2024-06-14 11:19:14,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 11:19:14,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 11:19:14,646 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 11:19:14,646 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 11:19:14,647 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 11:19:14,647 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 11:19:14,647 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 11:19:14,647 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 11:19:14,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 11:19:14,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 11:19:14,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 11:19:14,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 11:19:14,649 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 11:19:14,734 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 11:19:14,736 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 11:19:14,874 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 11:19:14,875 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 11:19:14,951 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 11:19:14,952 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 11:19:14,952 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:19:14 BoogieIcfgContainer [2024-06-14 11:19:14,952 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 11:19:14,954 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 11:19:14,954 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 11:19:14,963 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 11:19:14,963 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 11:19:13" (1/4) ... [2024-06-14 11:19:14,964 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea89c38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:19:14, skipping insertion in model container [2024-06-14 11:19:14,964 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:19:13" (2/4) ... [2024-06-14 11:19:14,964 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea89c38 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:19:14, skipping insertion in model container [2024-06-14 11:19:14,964 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:19:14" (3/4) ... [2024-06-14 11:19:14,965 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea89c38 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:19:14, skipping insertion in model container [2024-06-14 11:19:14,965 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:19:14" (4/4) ... [2024-06-14 11:19:14,966 INFO L112 eAbstractionObserver]: Analyzing ICFG safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 11:19:14,979 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 11:19:14,979 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 11:19:14,979 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 11:19:15,081 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 11:19:15,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-14 11:19:15,154 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-14 11:19:15,172 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:19:15,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 11:19:15,174 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-14 11:19:15,176 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-14 11:19:15,183 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 11:19:15,188 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;@44c7cd4d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 11:19:15,188 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 11:19:15,191 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 11:19:15,191 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 11:19:15,191 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:19:15,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:15,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 11:19:15,192 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:15,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:15,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1909711783, now seen corresponding path program 1 times [2024-06-14 11:19:15,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:15,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332004654] [2024-06-14 11:19:15,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:15,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:15,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:15,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:15,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:15,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332004654] [2024-06-14 11:19:15,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332004654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:15,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:15,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 11:19:15,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111186242] [2024-06-14 11:19:15,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:15,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 11:19:15,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:15,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 11:19:15,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 11:19:15,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-14 11:19:15,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:15,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:15,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-14 11:19:15,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:15,801 INFO L124 PetriNetUnfolderBase]: 471/808 cut-off events. [2024-06-14 11:19:15,801 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-06-14 11:19:15,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1598 conditions, 808 events. 471/808 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3931 event pairs, 288 based on Foata normal form. 1/788 useless extension candidates. Maximal degree in co-relation 1583. Up to 733 conditions per place. [2024-06-14 11:19:15,813 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 29 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-14 11:19:15,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 163 flow [2024-06-14 11:19:15,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 11:19:15,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 11:19:15,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-06-14 11:19:15,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-06-14 11:19:15,826 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 81 transitions. [2024-06-14 11:19:15,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 163 flow [2024-06-14 11:19:15,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 158 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:15,831 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-14 11:19:15,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-14 11:19:15,835 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-14 11:19:15,835 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-14 11:19:15,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:15,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:15,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:15,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 11:19:15,836 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:15,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:15,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1086635544, now seen corresponding path program 1 times [2024-06-14 11:19:15,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:15,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539610323] [2024-06-14 11:19:15,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:15,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:16,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:16,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:16,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539610323] [2024-06-14 11:19:16,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539610323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:16,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:16,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:19:16,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832174853] [2024-06-14 11:19:16,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:16,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:19:16,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:16,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:19:16,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:19:16,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:16,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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) [2024-06-14 11:19:16,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:16,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:16,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:16,241 INFO L124 PetriNetUnfolderBase]: 754/1255 cut-off events. [2024-06-14 11:19:16,242 INFO L125 PetriNetUnfolderBase]: For 194/197 co-relation queries the response was YES. [2024-06-14 11:19:16,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2859 conditions, 1255 events. 754/1255 cut-off events. For 194/197 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6082 event pairs, 318 based on Foata normal form. 5/1258 useless extension candidates. Maximal degree in co-relation 2844. Up to 1124 conditions per place. [2024-06-14 11:19:16,250 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 42 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-14 11:19:16,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 55 transitions, 254 flow [2024-06-14 11:19:16,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:19:16,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:19:16,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-14 11:19:16,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-14 11:19:16,255 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 101 transitions. [2024-06-14 11:19:16,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 55 transitions, 254 flow [2024-06-14 11:19:16,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 55 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 11:19:16,258 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 150 flow [2024-06-14 11:19:16,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-06-14 11:19:16,259 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-14 11:19:16,260 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 150 flow [2024-06-14 11:19:16,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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) [2024-06-14 11:19:16,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:16,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:16,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 11:19:16,263 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:16,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:16,264 INFO L85 PathProgramCache]: Analyzing trace with hash -2108259387, now seen corresponding path program 1 times [2024-06-14 11:19:16,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:16,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310021266] [2024-06-14 11:19:16,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:16,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:16,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:16,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:16,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310021266] [2024-06-14 11:19:16,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310021266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:16,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:16,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:16,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713808368] [2024-06-14 11:19:16,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:16,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:16,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:16,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:16,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:16,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:16,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 150 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 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) [2024-06-14 11:19:16,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:16,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:16,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:16,718 INFO L124 PetriNetUnfolderBase]: 745/1240 cut-off events. [2024-06-14 11:19:16,718 INFO L125 PetriNetUnfolderBase]: For 582/593 co-relation queries the response was YES. [2024-06-14 11:19:16,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3173 conditions, 1240 events. 745/1240 cut-off events. For 582/593 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6014 event pairs, 218 based on Foata normal form. 14/1252 useless extension candidates. Maximal degree in co-relation 3155. Up to 1079 conditions per place. [2024-06-14 11:19:16,726 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 46 selfloop transitions, 9 changer transitions 0/61 dead transitions. [2024-06-14 11:19:16,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 61 transitions, 314 flow [2024-06-14 11:19:16,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:19:16,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:19:16,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-14 11:19:16,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 11:19:16,730 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 150 flow. Second operand 5 states and 120 transitions. [2024-06-14 11:19:16,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 61 transitions, 314 flow [2024-06-14 11:19:16,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 61 transitions, 312 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-14 11:19:16,733 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 181 flow [2024-06-14 11:19:16,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=181, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2024-06-14 11:19:16,734 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-06-14 11:19:16,734 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 181 flow [2024-06-14 11:19:16,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 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) [2024-06-14 11:19:16,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:16,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:16,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 11:19:16,735 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:16,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:16,736 INFO L85 PathProgramCache]: Analyzing trace with hash -2090825248, now seen corresponding path program 1 times [2024-06-14 11:19:16,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:16,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366864458] [2024-06-14 11:19:16,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:16,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:16,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:16,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:16,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366864458] [2024-06-14 11:19:16,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366864458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:16,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:16,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:19:16,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022573672] [2024-06-14 11:19:16,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:16,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:19:16,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:16,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:19:16,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:19:16,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:16,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 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) [2024-06-14 11:19:16,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:16,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:16,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:17,004 INFO L124 PetriNetUnfolderBase]: 747/1229 cut-off events. [2024-06-14 11:19:17,004 INFO L125 PetriNetUnfolderBase]: For 1101/1104 co-relation queries the response was YES. [2024-06-14 11:19:17,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3432 conditions, 1229 events. 747/1229 cut-off events. For 1101/1104 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5848 event pairs, 254 based on Foata normal form. 5/1229 useless extension candidates. Maximal degree in co-relation 3411. Up to 1105 conditions per place. [2024-06-14 11:19:17,010 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 50 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-06-14 11:19:17,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 66 transitions, 393 flow [2024-06-14 11:19:17,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:19:17,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:19:17,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-14 11:19:17,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-14 11:19:17,012 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 181 flow. Second operand 4 states and 100 transitions. [2024-06-14 11:19:17,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 66 transitions, 393 flow [2024-06-14 11:19:17,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 66 transitions, 368 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:17,014 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 237 flow [2024-06-14 11:19:17,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=237, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-14 11:19:17,015 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2024-06-14 11:19:17,015 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 237 flow [2024-06-14 11:19:17,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 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) [2024-06-14 11:19:17,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:17,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:17,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 11:19:17,016 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:17,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:17,017 INFO L85 PathProgramCache]: Analyzing trace with hash -104084423, now seen corresponding path program 1 times [2024-06-14 11:19:17,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:17,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823515476] [2024-06-14 11:19:17,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:17,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:17,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:17,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823515476] [2024-06-14 11:19:17,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823515476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:17,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:17,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:17,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160423019] [2024-06-14 11:19:17,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:17,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:17,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:17,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:17,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:17,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:17,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:17,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:17,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:17,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:17,275 INFO L124 PetriNetUnfolderBase]: 758/1286 cut-off events. [2024-06-14 11:19:17,276 INFO L125 PetriNetUnfolderBase]: For 1869/1886 co-relation queries the response was YES. [2024-06-14 11:19:17,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4011 conditions, 1286 events. 758/1286 cut-off events. For 1869/1886 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6349 event pairs, 280 based on Foata normal form. 14/1296 useless extension candidates. Maximal degree in co-relation 3988. Up to 1085 conditions per place. [2024-06-14 11:19:17,284 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 55 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-14 11:19:17,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 77 transitions, 490 flow [2024-06-14 11:19:17,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:19:17,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:19:17,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-14 11:19:17,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615 [2024-06-14 11:19:17,285 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 237 flow. Second operand 5 states and 123 transitions. [2024-06-14 11:19:17,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 77 transitions, 490 flow [2024-06-14 11:19:17,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 77 transitions, 484 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-14 11:19:17,289 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 317 flow [2024-06-14 11:19:17,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=317, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2024-06-14 11:19:17,290 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 15 predicate places. [2024-06-14 11:19:17,290 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 317 flow [2024-06-14 11:19:17,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:17,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:17,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:17,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 11:19:17,291 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:17,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:17,292 INFO L85 PathProgramCache]: Analyzing trace with hash -671905851, now seen corresponding path program 2 times [2024-06-14 11:19:17,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:17,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765567357] [2024-06-14 11:19:17,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:17,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:17,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:17,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:17,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:17,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765567357] [2024-06-14 11:19:17,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765567357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:17,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:17,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:17,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62940201] [2024-06-14 11:19:17,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:17,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:17,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:17,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:17,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:17,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:17,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 317 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:17,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:17,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:17,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:17,577 INFO L124 PetriNetUnfolderBase]: 753/1279 cut-off events. [2024-06-14 11:19:17,578 INFO L125 PetriNetUnfolderBase]: For 2782/2799 co-relation queries the response was YES. [2024-06-14 11:19:17,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4335 conditions, 1279 events. 753/1279 cut-off events. For 2782/2799 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6327 event pairs, 280 based on Foata normal form. 14/1289 useless extension candidates. Maximal degree in co-relation 4309. Up to 1089 conditions per place. [2024-06-14 11:19:17,586 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 52 selfloop transitions, 13 changer transitions 0/71 dead transitions. [2024-06-14 11:19:17,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 71 transitions, 488 flow [2024-06-14 11:19:17,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:19:17,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:19:17,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-14 11:19:17,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-14 11:19:17,587 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 317 flow. Second operand 4 states and 101 transitions. [2024-06-14 11:19:17,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 71 transitions, 488 flow [2024-06-14 11:19:17,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 71 transitions, 457 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-14 11:19:17,592 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 324 flow [2024-06-14 11:19:17,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=324, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-06-14 11:19:17,593 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2024-06-14 11:19:17,593 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 324 flow [2024-06-14 11:19:17,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:17,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:17,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:17,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 11:19:17,594 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:17,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:17,595 INFO L85 PathProgramCache]: Analyzing trace with hash -671905665, now seen corresponding path program 1 times [2024-06-14 11:19:17,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:17,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934974141] [2024-06-14 11:19:17,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:17,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:17,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:17,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:17,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934974141] [2024-06-14 11:19:17,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934974141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:17,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:17,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:17,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312783312] [2024-06-14 11:19:17,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:17,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:17,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:17,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:17,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:17,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:17,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 324 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:17,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:17,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:17,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:17,898 INFO L124 PetriNetUnfolderBase]: 795/1325 cut-off events. [2024-06-14 11:19:17,899 INFO L125 PetriNetUnfolderBase]: For 3474/3491 co-relation queries the response was YES. [2024-06-14 11:19:17,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4680 conditions, 1325 events. 795/1325 cut-off events. For 3474/3491 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6511 event pairs, 253 based on Foata normal form. 15/1336 useless extension candidates. Maximal degree in co-relation 4652. Up to 1116 conditions per place. [2024-06-14 11:19:17,907 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 50 selfloop transitions, 23 changer transitions 0/79 dead transitions. [2024-06-14 11:19:17,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 79 transitions, 569 flow [2024-06-14 11:19:17,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:19:17,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:19:17,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-14 11:19:17,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 11:19:17,909 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 324 flow. Second operand 5 states and 120 transitions. [2024-06-14 11:19:17,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 79 transitions, 569 flow [2024-06-14 11:19:17,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 79 transitions, 543 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:17,914 INFO L231 Difference]: Finished difference. Result has 62 places, 65 transitions, 433 flow [2024-06-14 11:19:17,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=433, PETRI_PLACES=62, PETRI_TRANSITIONS=65} [2024-06-14 11:19:17,914 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 21 predicate places. [2024-06-14 11:19:17,914 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 65 transitions, 433 flow [2024-06-14 11:19:17,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:17,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:17,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:17,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 11:19:17,915 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:17,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:17,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1318642083, now seen corresponding path program 2 times [2024-06-14 11:19:17,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:17,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363647083] [2024-06-14 11:19:17,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:17,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:18,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:18,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:18,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363647083] [2024-06-14 11:19:18,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363647083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:18,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:18,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:18,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634779497] [2024-06-14 11:19:18,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:18,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:18,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:18,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:18,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:18,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:18,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 65 transitions, 433 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:18,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:18,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:18,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:18,187 INFO L124 PetriNetUnfolderBase]: 805/1336 cut-off events. [2024-06-14 11:19:18,188 INFO L125 PetriNetUnfolderBase]: For 4876/4896 co-relation queries the response was YES. [2024-06-14 11:19:18,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5304 conditions, 1336 events. 805/1336 cut-off events. For 4876/4896 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6534 event pairs, 267 based on Foata normal form. 17/1343 useless extension candidates. Maximal degree in co-relation 5274. Up to 1092 conditions per place. [2024-06-14 11:19:18,197 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 57 selfloop transitions, 31 changer transitions 0/94 dead transitions. [2024-06-14 11:19:18,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 94 transitions, 763 flow [2024-06-14 11:19:18,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:19:18,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:19:18,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-14 11:19:18,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-14 11:19:18,198 INFO L175 Difference]: Start difference. First operand has 62 places, 65 transitions, 433 flow. Second operand 5 states and 124 transitions. [2024-06-14 11:19:18,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 94 transitions, 763 flow [2024-06-14 11:19:18,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 94 transitions, 732 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-14 11:19:18,205 INFO L231 Difference]: Finished difference. Result has 67 places, 76 transitions, 584 flow [2024-06-14 11:19:18,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=584, PETRI_PLACES=67, PETRI_TRANSITIONS=76} [2024-06-14 11:19:18,205 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 26 predicate places. [2024-06-14 11:19:18,205 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 76 transitions, 584 flow [2024-06-14 11:19:18,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:18,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:18,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:18,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 11:19:18,206 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:18,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:18,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1318633155, now seen corresponding path program 1 times [2024-06-14 11:19:18,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:18,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710898501] [2024-06-14 11:19:18,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:18,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:18,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:18,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:18,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710898501] [2024-06-14 11:19:18,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710898501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:18,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:18,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:18,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145062986] [2024-06-14 11:19:18,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:18,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:18,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:18,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:18,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:18,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:18,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 76 transitions, 584 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:18,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:18,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:18,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:18,492 INFO L124 PetriNetUnfolderBase]: 835/1397 cut-off events. [2024-06-14 11:19:18,493 INFO L125 PetriNetUnfolderBase]: For 5766/5775 co-relation queries the response was YES. [2024-06-14 11:19:18,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5898 conditions, 1397 events. 835/1397 cut-off events. For 5766/5775 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6949 event pairs, 242 based on Foata normal form. 18/1410 useless extension candidates. Maximal degree in co-relation 5865. Up to 1175 conditions per place. [2024-06-14 11:19:18,504 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 83 selfloop transitions, 13 changer transitions 0/102 dead transitions. [2024-06-14 11:19:18,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 102 transitions, 898 flow [2024-06-14 11:19:18,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:19:18,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:19:18,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-14 11:19:18,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615 [2024-06-14 11:19:18,506 INFO L175 Difference]: Start difference. First operand has 67 places, 76 transitions, 584 flow. Second operand 5 states and 123 transitions. [2024-06-14 11:19:18,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 102 transitions, 898 flow [2024-06-14 11:19:18,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 102 transitions, 862 flow, removed 18 selfloop flow, removed 0 redundant places. [2024-06-14 11:19:18,515 INFO L231 Difference]: Finished difference. Result has 72 places, 78 transitions, 608 flow [2024-06-14 11:19:18,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=608, PETRI_PLACES=72, PETRI_TRANSITIONS=78} [2024-06-14 11:19:18,515 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-14 11:19:18,516 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 78 transitions, 608 flow [2024-06-14 11:19:18,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:18,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:18,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:18,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 11:19:18,516 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:18,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:18,517 INFO L85 PathProgramCache]: Analyzing trace with hash 2655179, now seen corresponding path program 1 times [2024-06-14 11:19:18,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:18,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253397396] [2024-06-14 11:19:18,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:18,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:18,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:18,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:18,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:18,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253397396] [2024-06-14 11:19:18,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253397396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:18,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:18,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:19:18,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050292214] [2024-06-14 11:19:18,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:18,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:19:18,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:18,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:19:18,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:19:18,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 11:19:18,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 78 transitions, 608 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:18,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:18,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 11:19:18,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:18,738 INFO L124 PetriNetUnfolderBase]: 760/1285 cut-off events. [2024-06-14 11:19:18,738 INFO L125 PetriNetUnfolderBase]: For 5934/5939 co-relation queries the response was YES. [2024-06-14 11:19:18,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5407 conditions, 1285 events. 760/1285 cut-off events. For 5934/5939 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6406 event pairs, 246 based on Foata normal form. 6/1270 useless extension candidates. Maximal degree in co-relation 5371. Up to 1115 conditions per place. [2024-06-14 11:19:18,749 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 66 selfloop transitions, 12 changer transitions 0/88 dead transitions. [2024-06-14 11:19:18,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 88 transitions, 803 flow [2024-06-14 11:19:18,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:19:18,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:19:18,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-06-14 11:19:18,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-14 11:19:18,751 INFO L175 Difference]: Start difference. First operand has 72 places, 78 transitions, 608 flow. Second operand 4 states and 97 transitions. [2024-06-14 11:19:18,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 88 transitions, 803 flow [2024-06-14 11:19:18,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 88 transitions, 769 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:18,758 INFO L231 Difference]: Finished difference. Result has 74 places, 80 transitions, 639 flow [2024-06-14 11:19:18,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=639, PETRI_PLACES=74, PETRI_TRANSITIONS=80} [2024-06-14 11:19:18,758 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 33 predicate places. [2024-06-14 11:19:18,759 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 80 transitions, 639 flow [2024-06-14 11:19:18,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:18,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:18,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:18,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 11:19:18,759 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:18,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:18,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1068351291, now seen corresponding path program 1 times [2024-06-14 11:19:18,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:18,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307485048] [2024-06-14 11:19:18,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:18,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:18,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:18,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:18,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307485048] [2024-06-14 11:19:18,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307485048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:18,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:18,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:18,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655700047] [2024-06-14 11:19:18,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:18,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:18,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:18,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:18,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:18,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:18,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 80 transitions, 639 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:18,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:18,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:18,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:19,095 INFO L124 PetriNetUnfolderBase]: 886/1494 cut-off events. [2024-06-14 11:19:19,096 INFO L125 PetriNetUnfolderBase]: For 6899/6919 co-relation queries the response was YES. [2024-06-14 11:19:19,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6282 conditions, 1494 events. 886/1494 cut-off events. For 6899/6919 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7624 event pairs, 249 based on Foata normal form. 17/1507 useless extension candidates. Maximal degree in co-relation 6244. Up to 1152 conditions per place. [2024-06-14 11:19:19,107 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 82 selfloop transitions, 42 changer transitions 0/130 dead transitions. [2024-06-14 11:19:19,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 130 transitions, 1157 flow [2024-06-14 11:19:19,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:19:19,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:19:19,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-14 11:19:19,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5861111111111111 [2024-06-14 11:19:19,109 INFO L175 Difference]: Start difference. First operand has 74 places, 80 transitions, 639 flow. Second operand 9 states and 211 transitions. [2024-06-14 11:19:19,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 130 transitions, 1157 flow [2024-06-14 11:19:19,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 130 transitions, 1145 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-14 11:19:19,117 INFO L231 Difference]: Finished difference. Result has 84 places, 92 transitions, 833 flow [2024-06-14 11:19:19,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=833, PETRI_PLACES=84, PETRI_TRANSITIONS=92} [2024-06-14 11:19:19,118 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-06-14 11:19:19,118 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 92 transitions, 833 flow [2024-06-14 11:19:19,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:19,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:19,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:19,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 11:19:19,119 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:19,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:19,120 INFO L85 PathProgramCache]: Analyzing trace with hash 645761787, now seen corresponding path program 2 times [2024-06-14 11:19:19,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:19,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260468475] [2024-06-14 11:19:19,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:19,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:19,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:19,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:19,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:19,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260468475] [2024-06-14 11:19:19,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260468475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:19,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:19,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:19,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197571961] [2024-06-14 11:19:19,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:19,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:19,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:19,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:19,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:19,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:19,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 92 transitions, 833 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:19,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:19,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:19,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:19,486 INFO L124 PetriNetUnfolderBase]: 912/1541 cut-off events. [2024-06-14 11:19:19,487 INFO L125 PetriNetUnfolderBase]: For 9498/9518 co-relation queries the response was YES. [2024-06-14 11:19:19,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7191 conditions, 1541 events. 912/1541 cut-off events. For 9498/9518 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 7928 event pairs, 250 based on Foata normal form. 17/1554 useless extension candidates. Maximal degree in co-relation 7149. Up to 1213 conditions per place. [2024-06-14 11:19:19,499 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 85 selfloop transitions, 42 changer transitions 0/133 dead transitions. [2024-06-14 11:19:19,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 133 transitions, 1349 flow [2024-06-14 11:19:19,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:19:19,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:19:19,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 11:19:19,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-14 11:19:19,501 INFO L175 Difference]: Start difference. First operand has 84 places, 92 transitions, 833 flow. Second operand 8 states and 191 transitions. [2024-06-14 11:19:19,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 133 transitions, 1349 flow [2024-06-14 11:19:19,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 133 transitions, 1244 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:19,515 INFO L231 Difference]: Finished difference. Result has 89 places, 101 transitions, 939 flow [2024-06-14 11:19:19,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=939, PETRI_PLACES=89, PETRI_TRANSITIONS=101} [2024-06-14 11:19:19,515 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2024-06-14 11:19:19,516 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 101 transitions, 939 flow [2024-06-14 11:19:19,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:19,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:19,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:19,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 11:19:19,516 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:19,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:19,517 INFO L85 PathProgramCache]: Analyzing trace with hash 645756207, now seen corresponding path program 3 times [2024-06-14 11:19:19,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:19,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246927861] [2024-06-14 11:19:19,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:19,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:19,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:19,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:19,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:19,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246927861] [2024-06-14 11:19:19,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246927861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:19,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:19,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:19,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838749334] [2024-06-14 11:19:19,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:19,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:19,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:19,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:19,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:19,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:19,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 101 transitions, 939 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:19,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:19,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:19,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:19,887 INFO L124 PetriNetUnfolderBase]: 906/1533 cut-off events. [2024-06-14 11:19:19,887 INFO L125 PetriNetUnfolderBase]: For 10801/10818 co-relation queries the response was YES. [2024-06-14 11:19:19,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7408 conditions, 1533 events. 906/1533 cut-off events. For 10801/10818 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7895 event pairs, 250 based on Foata normal form. 15/1544 useless extension candidates. Maximal degree in co-relation 7363. Up to 1209 conditions per place. [2024-06-14 11:19:19,899 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 83 selfloop transitions, 37 changer transitions 0/126 dead transitions. [2024-06-14 11:19:19,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 126 transitions, 1291 flow [2024-06-14 11:19:19,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:19,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:19,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-14 11:19:19,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-14 11:19:19,901 INFO L175 Difference]: Start difference. First operand has 89 places, 101 transitions, 939 flow. Second operand 6 states and 150 transitions. [2024-06-14 11:19:19,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 126 transitions, 1291 flow [2024-06-14 11:19:19,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 126 transitions, 1212 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:19,917 INFO L231 Difference]: Finished difference. Result has 92 places, 101 transitions, 944 flow [2024-06-14 11:19:19,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=944, PETRI_PLACES=92, PETRI_TRANSITIONS=101} [2024-06-14 11:19:19,917 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 51 predicate places. [2024-06-14 11:19:19,918 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 101 transitions, 944 flow [2024-06-14 11:19:19,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:19,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:19,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:19,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 11:19:19,918 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:19,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:19,919 INFO L85 PathProgramCache]: Analyzing trace with hash 2071769309, now seen corresponding path program 4 times [2024-06-14 11:19:19,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:19,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399399333] [2024-06-14 11:19:19,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:19,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:20,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:20,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:20,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399399333] [2024-06-14 11:19:20,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399399333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:20,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:20,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:20,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716520497] [2024-06-14 11:19:20,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:20,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:20,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:20,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:20,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:20,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:20,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 101 transitions, 944 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:20,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:20,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:20,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:20,371 INFO L124 PetriNetUnfolderBase]: 930/1569 cut-off events. [2024-06-14 11:19:20,371 INFO L125 PetriNetUnfolderBase]: For 12408/12425 co-relation queries the response was YES. [2024-06-14 11:19:20,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7798 conditions, 1569 events. 930/1569 cut-off events. For 12408/12425 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8107 event pairs, 255 based on Foata normal form. 15/1574 useless extension candidates. Maximal degree in co-relation 7751. Up to 1171 conditions per place. [2024-06-14 11:19:20,399 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 82 selfloop transitions, 60 changer transitions 0/148 dead transitions. [2024-06-14 11:19:20,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 148 transitions, 1528 flow [2024-06-14 11:19:20,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:19:20,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:19:20,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 11:19:20,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-14 11:19:20,401 INFO L175 Difference]: Start difference. First operand has 92 places, 101 transitions, 944 flow. Second operand 8 states and 194 transitions. [2024-06-14 11:19:20,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 148 transitions, 1528 flow [2024-06-14 11:19:20,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 148 transitions, 1454 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:20,419 INFO L231 Difference]: Finished difference. Result has 96 places, 113 transitions, 1144 flow [2024-06-14 11:19:20,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1144, PETRI_PLACES=96, PETRI_TRANSITIONS=113} [2024-06-14 11:19:20,420 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 55 predicate places. [2024-06-14 11:19:20,420 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 113 transitions, 1144 flow [2024-06-14 11:19:20,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:20,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:20,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:20,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 11:19:20,421 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:20,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:20,421 INFO L85 PathProgramCache]: Analyzing trace with hash 505754820, now seen corresponding path program 1 times [2024-06-14 11:19:20,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:20,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725309011] [2024-06-14 11:19:20,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:20,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:20,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:20,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:20,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:20,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725309011] [2024-06-14 11:19:20,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725309011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:20,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:20,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:20,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245051899] [2024-06-14 11:19:20,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:20,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:20,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:20,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:20,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:20,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:20,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 113 transitions, 1144 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:20,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:20,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:20,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:20,791 INFO L124 PetriNetUnfolderBase]: 947/1598 cut-off events. [2024-06-14 11:19:20,791 INFO L125 PetriNetUnfolderBase]: For 15451/15468 co-relation queries the response was YES. [2024-06-14 11:19:20,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8569 conditions, 1598 events. 947/1598 cut-off events. For 15451/15468 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8291 event pairs, 164 based on Foata normal form. 16/1610 useless extension candidates. Maximal degree in co-relation 8520. Up to 1278 conditions per place. [2024-06-14 11:19:20,802 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 114 selfloop transitions, 23 changer transitions 0/143 dead transitions. [2024-06-14 11:19:20,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 143 transitions, 1604 flow [2024-06-14 11:19:20,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:20,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:20,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 11:19:20,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 11:19:20,804 INFO L175 Difference]: Start difference. First operand has 96 places, 113 transitions, 1144 flow. Second operand 6 states and 144 transitions. [2024-06-14 11:19:20,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 143 transitions, 1604 flow [2024-06-14 11:19:20,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 143 transitions, 1500 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:20,823 INFO L231 Difference]: Finished difference. Result has 99 places, 117 transitions, 1169 flow [2024-06-14 11:19:20,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1169, PETRI_PLACES=99, PETRI_TRANSITIONS=117} [2024-06-14 11:19:20,824 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 58 predicate places. [2024-06-14 11:19:20,824 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 117 transitions, 1169 flow [2024-06-14 11:19:20,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:20,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:20,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:20,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 11:19:20,825 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:20,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:20,825 INFO L85 PathProgramCache]: Analyzing trace with hash 619434300, now seen corresponding path program 2 times [2024-06-14 11:19:20,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:20,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394252885] [2024-06-14 11:19:20,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:20,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:20,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:20,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:20,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394252885] [2024-06-14 11:19:20,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394252885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:20,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:20,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:20,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988930577] [2024-06-14 11:19:20,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:20,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:20,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:20,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:20,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:20,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:20,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 117 transitions, 1169 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:20,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:20,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:20,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:21,177 INFO L124 PetriNetUnfolderBase]: 964/1625 cut-off events. [2024-06-14 11:19:21,177 INFO L125 PetriNetUnfolderBase]: For 16927/16944 co-relation queries the response was YES. [2024-06-14 11:19:21,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8832 conditions, 1625 events. 964/1625 cut-off events. For 16927/16944 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8440 event pairs, 235 based on Foata normal form. 16/1637 useless extension candidates. Maximal degree in co-relation 8781. Up to 1369 conditions per place. [2024-06-14 11:19:21,188 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 116 selfloop transitions, 20 changer transitions 0/142 dead transitions. [2024-06-14 11:19:21,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 142 transitions, 1537 flow [2024-06-14 11:19:21,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:21,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:21,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-14 11:19:21,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-14 11:19:21,189 INFO L175 Difference]: Start difference. First operand has 99 places, 117 transitions, 1169 flow. Second operand 6 states and 141 transitions. [2024-06-14 11:19:21,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 142 transitions, 1537 flow [2024-06-14 11:19:21,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 142 transitions, 1464 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-14 11:19:21,215 INFO L231 Difference]: Finished difference. Result has 103 places, 119 transitions, 1185 flow [2024-06-14 11:19:21,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1108, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1185, PETRI_PLACES=103, PETRI_TRANSITIONS=119} [2024-06-14 11:19:21,215 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 62 predicate places. [2024-06-14 11:19:21,215 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 119 transitions, 1185 flow [2024-06-14 11:19:21,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:21,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:21,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:21,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 11:19:21,216 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:21,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:21,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1456397884, now seen corresponding path program 3 times [2024-06-14 11:19:21,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:21,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158774964] [2024-06-14 11:19:21,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:21,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:21,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:21,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:21,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158774964] [2024-06-14 11:19:21,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158774964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:21,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:21,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:21,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193915357] [2024-06-14 11:19:21,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:21,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:21,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:21,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:21,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:21,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:21,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 119 transitions, 1185 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:21,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:21,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:21,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:21,532 INFO L124 PetriNetUnfolderBase]: 956/1613 cut-off events. [2024-06-14 11:19:21,533 INFO L125 PetriNetUnfolderBase]: For 17752/17769 co-relation queries the response was YES. [2024-06-14 11:19:21,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8727 conditions, 1613 events. 956/1613 cut-off events. For 17752/17769 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8358 event pairs, 162 based on Foata normal form. 16/1625 useless extension candidates. Maximal degree in co-relation 8674. Up to 1336 conditions per place. [2024-06-14 11:19:21,544 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 113 selfloop transitions, 19 changer transitions 0/138 dead transitions. [2024-06-14 11:19:21,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 138 transitions, 1497 flow [2024-06-14 11:19:21,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:19:21,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:19:21,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-14 11:19:21,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-06-14 11:19:21,545 INFO L175 Difference]: Start difference. First operand has 103 places, 119 transitions, 1185 flow. Second operand 5 states and 122 transitions. [2024-06-14 11:19:21,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 138 transitions, 1497 flow [2024-06-14 11:19:21,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 138 transitions, 1426 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:21,593 INFO L231 Difference]: Finished difference. Result has 104 places, 119 transitions, 1162 flow [2024-06-14 11:19:21,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1162, PETRI_PLACES=104, PETRI_TRANSITIONS=119} [2024-06-14 11:19:21,593 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-14 11:19:21,594 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 119 transitions, 1162 flow [2024-06-14 11:19:21,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:21,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:21,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:21,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 11:19:21,594 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:21,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:21,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1456213186, now seen corresponding path program 1 times [2024-06-14 11:19:21,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:21,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757189021] [2024-06-14 11:19:21,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:21,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:21,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:21,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:21,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757189021] [2024-06-14 11:19:21,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757189021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:21,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:21,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:21,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838628959] [2024-06-14 11:19:21,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:21,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:21,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:21,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:21,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:21,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:21,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 119 transitions, 1162 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:21,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:21,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:21,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:21,935 INFO L124 PetriNetUnfolderBase]: 1011/1700 cut-off events. [2024-06-14 11:19:21,935 INFO L125 PetriNetUnfolderBase]: For 20528/20545 co-relation queries the response was YES. [2024-06-14 11:19:21,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9127 conditions, 1700 events. 1011/1700 cut-off events. For 20528/20545 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8878 event pairs, 213 based on Foata normal form. 24/1720 useless extension candidates. Maximal degree in co-relation 9073. Up to 1334 conditions per place. [2024-06-14 11:19:21,948 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 108 selfloop transitions, 29 changer transitions 0/143 dead transitions. [2024-06-14 11:19:21,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 143 transitions, 1574 flow [2024-06-14 11:19:21,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:21,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:21,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 11:19:21,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 11:19:21,949 INFO L175 Difference]: Start difference. First operand has 104 places, 119 transitions, 1162 flow. Second operand 6 states and 144 transitions. [2024-06-14 11:19:21,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 143 transitions, 1574 flow [2024-06-14 11:19:21,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 143 transitions, 1529 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:21,978 INFO L231 Difference]: Finished difference. Result has 106 places, 121 transitions, 1221 flow [2024-06-14 11:19:21,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1117, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1221, PETRI_PLACES=106, PETRI_TRANSITIONS=121} [2024-06-14 11:19:21,979 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 65 predicate places. [2024-06-14 11:19:21,979 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 121 transitions, 1221 flow [2024-06-14 11:19:21,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:21,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:21,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:21,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 11:19:21,979 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:21,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:21,980 INFO L85 PathProgramCache]: Analyzing trace with hash -136175702, now seen corresponding path program 1 times [2024-06-14 11:19:21,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:21,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159874335] [2024-06-14 11:19:21,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:21,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:21,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:22,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:22,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:22,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159874335] [2024-06-14 11:19:22,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159874335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:22,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:22,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:19:22,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566914897] [2024-06-14 11:19:22,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:22,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:19:22,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:22,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:19:22,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:19:22,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 11:19:22,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 121 transitions, 1221 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:22,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:22,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 11:19:22,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:22,366 INFO L124 PetriNetUnfolderBase]: 937/1589 cut-off events. [2024-06-14 11:19:22,367 INFO L125 PetriNetUnfolderBase]: For 20714/20723 co-relation queries the response was YES. [2024-06-14 11:19:22,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8854 conditions, 1589 events. 937/1589 cut-off events. For 20714/20723 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8325 event pairs, 214 based on Foata normal form. 8/1576 useless extension candidates. Maximal degree in co-relation 8799. Up to 1337 conditions per place. [2024-06-14 11:19:22,380 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 96 selfloop transitions, 25 changer transitions 0/133 dead transitions. [2024-06-14 11:19:22,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 133 transitions, 1493 flow [2024-06-14 11:19:22,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:19:22,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:19:22,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-14 11:19:22,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 11:19:22,382 INFO L175 Difference]: Start difference. First operand has 106 places, 121 transitions, 1221 flow. Second operand 5 states and 120 transitions. [2024-06-14 11:19:22,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 133 transitions, 1493 flow [2024-06-14 11:19:22,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 133 transitions, 1417 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:22,411 INFO L231 Difference]: Finished difference. Result has 107 places, 121 transitions, 1211 flow [2024-06-14 11:19:22,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1211, PETRI_PLACES=107, PETRI_TRANSITIONS=121} [2024-06-14 11:19:22,412 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 66 predicate places. [2024-06-14 11:19:22,412 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 121 transitions, 1211 flow [2024-06-14 11:19:22,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:22,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:22,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:22,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 11:19:22,413 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:22,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:22,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1817930080, now seen corresponding path program 2 times [2024-06-14 11:19:22,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:22,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824722389] [2024-06-14 11:19:22,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:22,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:22,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:22,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:22,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:22,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824722389] [2024-06-14 11:19:22,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824722389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:22,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:22,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:22,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020867217] [2024-06-14 11:19:22,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:22,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:22,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:22,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:22,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:22,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:22,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 121 transitions, 1211 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:22,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:22,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:22,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:22,777 INFO L124 PetriNetUnfolderBase]: 1033/1729 cut-off events. [2024-06-14 11:19:22,777 INFO L125 PetriNetUnfolderBase]: For 24049/24066 co-relation queries the response was YES. [2024-06-14 11:19:22,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9476 conditions, 1729 events. 1033/1729 cut-off events. For 24049/24066 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9028 event pairs, 244 based on Foata normal form. 24/1743 useless extension candidates. Maximal degree in co-relation 9420. Up to 1402 conditions per place. [2024-06-14 11:19:22,788 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 110 selfloop transitions, 33 changer transitions 0/149 dead transitions. [2024-06-14 11:19:22,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 149 transitions, 1689 flow [2024-06-14 11:19:22,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:22,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:22,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 11:19:22,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-14 11:19:22,789 INFO L175 Difference]: Start difference. First operand has 107 places, 121 transitions, 1211 flow. Second operand 6 states and 147 transitions. [2024-06-14 11:19:22,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 149 transitions, 1689 flow [2024-06-14 11:19:22,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 149 transitions, 1626 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:22,821 INFO L231 Difference]: Finished difference. Result has 108 places, 123 transitions, 1264 flow [2024-06-14 11:19:22,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1152, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1264, PETRI_PLACES=108, PETRI_TRANSITIONS=123} [2024-06-14 11:19:22,821 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-14 11:19:22,821 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 123 transitions, 1264 flow [2024-06-14 11:19:22,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:22,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:22,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:22,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 11:19:22,822 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:22,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:22,822 INFO L85 PathProgramCache]: Analyzing trace with hash -191082084, now seen corresponding path program 3 times [2024-06-14 11:19:22,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:22,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521053397] [2024-06-14 11:19:22,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:22,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:22,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:22,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521053397] [2024-06-14 11:19:22,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521053397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:22,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:22,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:22,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414352888] [2024-06-14 11:19:22,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:22,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:22,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:22,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:22,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:22,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:22,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 123 transitions, 1264 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:22,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:22,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:22,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:23,181 INFO L124 PetriNetUnfolderBase]: 1099/1831 cut-off events. [2024-06-14 11:19:23,182 INFO L125 PetriNetUnfolderBase]: For 25561/25578 co-relation queries the response was YES. [2024-06-14 11:19:23,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10123 conditions, 1831 events. 1099/1831 cut-off events. For 25561/25578 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9661 event pairs, 225 based on Foata normal form. 24/1845 useless extension candidates. Maximal degree in co-relation 10067. Up to 1285 conditions per place. [2024-06-14 11:19:23,195 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 112 selfloop transitions, 39 changer transitions 0/157 dead transitions. [2024-06-14 11:19:23,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 157 transitions, 1834 flow [2024-06-14 11:19:23,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:23,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:23,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-14 11:19:23,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-14 11:19:23,197 INFO L175 Difference]: Start difference. First operand has 108 places, 123 transitions, 1264 flow. Second operand 6 states and 151 transitions. [2024-06-14 11:19:23,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 157 transitions, 1834 flow [2024-06-14 11:19:23,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 157 transitions, 1744 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:23,234 INFO L231 Difference]: Finished difference. Result has 110 places, 126 transitions, 1311 flow [2024-06-14 11:19:23,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1311, PETRI_PLACES=110, PETRI_TRANSITIONS=126} [2024-06-14 11:19:23,235 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2024-06-14 11:19:23,235 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 126 transitions, 1311 flow [2024-06-14 11:19:23,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:23,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:23,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:23,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 11:19:23,236 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:23,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:23,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1743306966, now seen corresponding path program 2 times [2024-06-14 11:19:23,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:23,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908625037] [2024-06-14 11:19:23,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:23,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:23,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:23,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:23,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:23,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908625037] [2024-06-14 11:19:23,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908625037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:23,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:23,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:19:23,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81637575] [2024-06-14 11:19:23,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:23,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:19:23,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:23,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:19:23,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:19:23,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 11:19:23,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 126 transitions, 1311 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:23,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:23,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 11:19:23,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:23,519 INFO L124 PetriNetUnfolderBase]: 1047/1751 cut-off events. [2024-06-14 11:19:23,519 INFO L125 PetriNetUnfolderBase]: For 26339/26348 co-relation queries the response was YES. [2024-06-14 11:19:23,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9977 conditions, 1751 events. 1047/1751 cut-off events. For 26339/26348 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9315 event pairs, 262 based on Foata normal form. 8/1734 useless extension candidates. Maximal degree in co-relation 9920. Up to 1481 conditions per place. [2024-06-14 11:19:23,534 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 92 selfloop transitions, 36 changer transitions 0/140 dead transitions. [2024-06-14 11:19:23,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 140 transitions, 1706 flow [2024-06-14 11:19:23,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:19:23,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:19:23,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-14 11:19:23,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 11:19:23,535 INFO L175 Difference]: Start difference. First operand has 110 places, 126 transitions, 1311 flow. Second operand 5 states and 120 transitions. [2024-06-14 11:19:23,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 140 transitions, 1706 flow [2024-06-14 11:19:23,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 140 transitions, 1633 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-14 11:19:23,570 INFO L231 Difference]: Finished difference. Result has 113 places, 129 transitions, 1354 flow [2024-06-14 11:19:23,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1241, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1354, PETRI_PLACES=113, PETRI_TRANSITIONS=129} [2024-06-14 11:19:23,571 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 72 predicate places. [2024-06-14 11:19:23,571 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 129 transitions, 1354 flow [2024-06-14 11:19:23,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:23,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:23,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:23,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 11:19:23,571 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:23,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:23,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1349607368, now seen corresponding path program 1 times [2024-06-14 11:19:23,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:23,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424223692] [2024-06-14 11:19:23,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:23,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:23,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:23,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:23,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:23,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424223692] [2024-06-14 11:19:23,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424223692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:23,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:23,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:19:23,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065353299] [2024-06-14 11:19:23,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:23,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:19:23,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:23,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:19:23,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:19:23,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 11:19:23,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 129 transitions, 1354 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:23,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:23,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 11:19:23,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:23,872 INFO L124 PetriNetUnfolderBase]: 1061/1783 cut-off events. [2024-06-14 11:19:23,872 INFO L125 PetriNetUnfolderBase]: For 28557/28562 co-relation queries the response was YES. [2024-06-14 11:19:23,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10074 conditions, 1783 events. 1061/1783 cut-off events. For 28557/28562 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9489 event pairs, 247 based on Foata normal form. 15/1779 useless extension candidates. Maximal degree in co-relation 10015. Up to 1534 conditions per place. [2024-06-14 11:19:23,887 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 118 selfloop transitions, 14 changer transitions 0/144 dead transitions. [2024-06-14 11:19:23,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 144 transitions, 1684 flow [2024-06-14 11:19:23,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:19:23,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:19:23,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-14 11:19:23,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-14 11:19:23,888 INFO L175 Difference]: Start difference. First operand has 113 places, 129 transitions, 1354 flow. Second operand 5 states and 118 transitions. [2024-06-14 11:19:23,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 144 transitions, 1684 flow [2024-06-14 11:19:23,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 144 transitions, 1579 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:23,923 INFO L231 Difference]: Finished difference. Result has 114 places, 131 transitions, 1307 flow [2024-06-14 11:19:23,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1249, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1307, PETRI_PLACES=114, PETRI_TRANSITIONS=131} [2024-06-14 11:19:23,924 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2024-06-14 11:19:23,924 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 131 transitions, 1307 flow [2024-06-14 11:19:23,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:23,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:23,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:23,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 11:19:23,925 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:23,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:23,926 INFO L85 PathProgramCache]: Analyzing trace with hash -288866032, now seen corresponding path program 1 times [2024-06-14 11:19:23,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:23,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548179885] [2024-06-14 11:19:23,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:23,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:24,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:24,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:24,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548179885] [2024-06-14 11:19:24,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548179885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:24,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:24,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:24,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040895276] [2024-06-14 11:19:24,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:24,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:24,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:24,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:24,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:24,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:24,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 131 transitions, 1307 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-06-14 11:19:24,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:24,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:24,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:24,439 INFO L124 PetriNetUnfolderBase]: 1679/2880 cut-off events. [2024-06-14 11:19:24,440 INFO L125 PetriNetUnfolderBase]: For 56905/56922 co-relation queries the response was YES. [2024-06-14 11:19:24,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16090 conditions, 2880 events. 1679/2880 cut-off events. For 56905/56922 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 17470 event pairs, 441 based on Foata normal form. 48/2924 useless extension candidates. Maximal degree in co-relation 16032. Up to 1290 conditions per place. [2024-06-14 11:19:24,462 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 138 selfloop transitions, 49 changer transitions 0/193 dead transitions. [2024-06-14 11:19:24,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 193 transitions, 2157 flow [2024-06-14 11:19:24,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:19:24,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:19:24,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-14 11:19:24,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6305555555555555 [2024-06-14 11:19:24,464 INFO L175 Difference]: Start difference. First operand has 114 places, 131 transitions, 1307 flow. Second operand 9 states and 227 transitions. [2024-06-14 11:19:24,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 193 transitions, 2157 flow [2024-06-14 11:19:24,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 193 transitions, 2121 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:24,523 INFO L231 Difference]: Finished difference. Result has 122 places, 134 transitions, 1463 flow [2024-06-14 11:19:24,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1271, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1463, PETRI_PLACES=122, PETRI_TRANSITIONS=134} [2024-06-14 11:19:24,524 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-14 11:19:24,525 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 134 transitions, 1463 flow [2024-06-14 11:19:24,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-06-14 11:19:24,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:24,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:24,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 11:19:24,525 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:24,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:24,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1499594706, now seen corresponding path program 2 times [2024-06-14 11:19:24,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:24,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188361190] [2024-06-14 11:19:24,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:24,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:24,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:24,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:24,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188361190] [2024-06-14 11:19:24,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188361190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:24,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:24,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:24,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374699816] [2024-06-14 11:19:24,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:24,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:24,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:24,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:24,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:24,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:24,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 134 transitions, 1463 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-06-14 11:19:24,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:24,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:24,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:25,132 INFO L124 PetriNetUnfolderBase]: 2069/3572 cut-off events. [2024-06-14 11:19:25,133 INFO L125 PetriNetUnfolderBase]: For 80352/80369 co-relation queries the response was YES. [2024-06-14 11:19:25,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20587 conditions, 3572 events. 2069/3572 cut-off events. For 80352/80369 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 23114 event pairs, 724 based on Foata normal form. 48/3616 useless extension candidates. Maximal degree in co-relation 20526. Up to 2374 conditions per place. [2024-06-14 11:19:25,168 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 137 selfloop transitions, 49 changer transitions 0/192 dead transitions. [2024-06-14 11:19:25,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 192 transitions, 2275 flow [2024-06-14 11:19:25,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:19:25,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:19:25,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 243 transitions. [2024-06-14 11:19:25,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6075 [2024-06-14 11:19:25,169 INFO L175 Difference]: Start difference. First operand has 122 places, 134 transitions, 1463 flow. Second operand 10 states and 243 transitions. [2024-06-14 11:19:25,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 192 transitions, 2275 flow [2024-06-14 11:19:25,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 192 transitions, 2171 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:25,262 INFO L231 Difference]: Finished difference. Result has 128 places, 136 transitions, 1528 flow [2024-06-14 11:19:25,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1359, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1528, PETRI_PLACES=128, PETRI_TRANSITIONS=136} [2024-06-14 11:19:25,262 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 87 predicate places. [2024-06-14 11:19:25,263 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 136 transitions, 1528 flow [2024-06-14 11:19:25,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-06-14 11:19:25,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:25,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:25,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 11:19:25,264 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:25,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:25,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1412755026, now seen corresponding path program 3 times [2024-06-14 11:19:25,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:25,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858123373] [2024-06-14 11:19:25,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:25,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:25,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:25,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:25,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:25,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858123373] [2024-06-14 11:19:25,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858123373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:25,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:25,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:25,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818717433] [2024-06-14 11:19:25,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:25,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:25,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:25,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:25,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:25,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:25,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 136 transitions, 1528 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-06-14 11:19:25,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:25,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:25,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:25,870 INFO L124 PetriNetUnfolderBase]: 2142/3715 cut-off events. [2024-06-14 11:19:25,870 INFO L125 PetriNetUnfolderBase]: For 84258/84275 co-relation queries the response was YES. [2024-06-14 11:19:25,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20957 conditions, 3715 events. 2142/3715 cut-off events. For 84258/84275 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 24247 event pairs, 855 based on Foata normal form. 54/3763 useless extension candidates. Maximal degree in co-relation 20894. Up to 2945 conditions per place. [2024-06-14 11:19:25,957 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 126 selfloop transitions, 49 changer transitions 0/181 dead transitions. [2024-06-14 11:19:25,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 181 transitions, 2144 flow [2024-06-14 11:19:25,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:19:25,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:19:25,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-14 11:19:25,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5825 [2024-06-14 11:19:25,959 INFO L175 Difference]: Start difference. First operand has 128 places, 136 transitions, 1528 flow. Second operand 10 states and 233 transitions. [2024-06-14 11:19:25,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 181 transitions, 2144 flow [2024-06-14 11:19:26,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 181 transitions, 2025 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 11:19:26,048 INFO L231 Difference]: Finished difference. Result has 131 places, 137 transitions, 1551 flow [2024-06-14 11:19:26,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1551, PETRI_PLACES=131, PETRI_TRANSITIONS=137} [2024-06-14 11:19:26,049 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 90 predicate places. [2024-06-14 11:19:26,049 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 137 transitions, 1551 flow [2024-06-14 11:19:26,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-06-14 11:19:26,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:26,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:26,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 11:19:26,049 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:26,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:26,051 INFO L85 PathProgramCache]: Analyzing trace with hash 73223106, now seen corresponding path program 1 times [2024-06-14 11:19:26,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:26,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825680923] [2024-06-14 11:19:26,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:26,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:26,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:26,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:26,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825680923] [2024-06-14 11:19:26,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825680923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:26,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:26,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:26,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653962439] [2024-06-14 11:19:26,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:26,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:26,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:26,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:26,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:26,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:26,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 137 transitions, 1551 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:26,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:26,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:26,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:26,680 INFO L124 PetriNetUnfolderBase]: 2147/3724 cut-off events. [2024-06-14 11:19:26,681 INFO L125 PetriNetUnfolderBase]: For 76297/76308 co-relation queries the response was YES. [2024-06-14 11:19:26,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21115 conditions, 3724 events. 2147/3724 cut-off events. For 76297/76308 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 24285 event pairs, 853 based on Foata normal form. 9/3731 useless extension candidates. Maximal degree in co-relation 21051. Up to 3375 conditions per place. [2024-06-14 11:19:26,712 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 141 selfloop transitions, 19 changer transitions 0/166 dead transitions. [2024-06-14 11:19:26,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 166 transitions, 2135 flow [2024-06-14 11:19:26,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:26,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:26,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-14 11:19:26,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392857142857143 [2024-06-14 11:19:26,714 INFO L175 Difference]: Start difference. First operand has 131 places, 137 transitions, 1551 flow. Second operand 7 states and 151 transitions. [2024-06-14 11:19:26,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 166 transitions, 2135 flow [2024-06-14 11:19:26,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 166 transitions, 1995 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-14 11:19:26,821 INFO L231 Difference]: Finished difference. Result has 131 places, 147 transitions, 1641 flow [2024-06-14 11:19:26,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1429, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1641, PETRI_PLACES=131, PETRI_TRANSITIONS=147} [2024-06-14 11:19:26,821 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 90 predicate places. [2024-06-14 11:19:26,822 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 147 transitions, 1641 flow [2024-06-14 11:19:26,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:26,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:26,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:26,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 11:19:26,822 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:26,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:26,823 INFO L85 PathProgramCache]: Analyzing trace with hash -473022442, now seen corresponding path program 4 times [2024-06-14 11:19:26,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:26,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140025262] [2024-06-14 11:19:26,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:26,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:26,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:26,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:26,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:26,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140025262] [2024-06-14 11:19:26,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140025262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:26,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:26,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:26,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137367299] [2024-06-14 11:19:26,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:26,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:26,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:26,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:26,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:27,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:27,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 147 transitions, 1641 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-06-14 11:19:27,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:27,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:27,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:27,618 INFO L124 PetriNetUnfolderBase]: 2281/3932 cut-off events. [2024-06-14 11:19:27,618 INFO L125 PetriNetUnfolderBase]: For 97106/97123 co-relation queries the response was YES. [2024-06-14 11:19:27,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22003 conditions, 3932 events. 2281/3932 cut-off events. For 97106/97123 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 25827 event pairs, 888 based on Foata normal form. 54/3978 useless extension candidates. Maximal degree in co-relation 21937. Up to 3264 conditions per place. [2024-06-14 11:19:27,647 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 126 selfloop transitions, 51 changer transitions 3/186 dead transitions. [2024-06-14 11:19:27,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 186 transitions, 2203 flow [2024-06-14 11:19:27,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:19:27,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:19:27,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-14 11:19:27,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2024-06-14 11:19:27,648 INFO L175 Difference]: Start difference. First operand has 131 places, 147 transitions, 1641 flow. Second operand 9 states and 212 transitions. [2024-06-14 11:19:27,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 186 transitions, 2203 flow [2024-06-14 11:19:27,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 186 transitions, 2176 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-14 11:19:27,732 INFO L231 Difference]: Finished difference. Result has 138 places, 147 transitions, 1749 flow [2024-06-14 11:19:27,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1614, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1749, PETRI_PLACES=138, PETRI_TRANSITIONS=147} [2024-06-14 11:19:27,733 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2024-06-14 11:19:27,733 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 147 transitions, 1749 flow [2024-06-14 11:19:27,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-06-14 11:19:27,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:27,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:27,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 11:19:27,734 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:27,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:27,734 INFO L85 PathProgramCache]: Analyzing trace with hash 2096454830, now seen corresponding path program 5 times [2024-06-14 11:19:27,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:27,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701412976] [2024-06-14 11:19:27,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:27,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:27,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:27,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:27,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701412976] [2024-06-14 11:19:27,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701412976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:27,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:27,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:27,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429981447] [2024-06-14 11:19:27,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:27,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:27,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:27,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:27,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:27,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:27,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 147 transitions, 1749 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-06-14 11:19:27,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:27,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:27,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:28,448 INFO L124 PetriNetUnfolderBase]: 2405/4178 cut-off events. [2024-06-14 11:19:28,448 INFO L125 PetriNetUnfolderBase]: For 104255/104272 co-relation queries the response was YES. [2024-06-14 11:19:28,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23291 conditions, 4178 events. 2405/4178 cut-off events. For 104255/104272 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 27873 event pairs, 967 based on Foata normal form. 54/4228 useless extension candidates. Maximal degree in co-relation 23223. Up to 3434 conditions per place. [2024-06-14 11:19:28,585 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 129 selfloop transitions, 46 changer transitions 0/181 dead transitions. [2024-06-14 11:19:28,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 181 transitions, 2293 flow [2024-06-14 11:19:28,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:28,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:28,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 11:19:28,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-14 11:19:28,588 INFO L175 Difference]: Start difference. First operand has 138 places, 147 transitions, 1749 flow. Second operand 7 states and 173 transitions. [2024-06-14 11:19:28,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 181 transitions, 2293 flow [2024-06-14 11:19:28,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 181 transitions, 2164 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 11:19:28,706 INFO L231 Difference]: Finished difference. Result has 138 places, 148 transitions, 1760 flow [2024-06-14 11:19:28,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1620, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1760, PETRI_PLACES=138, PETRI_TRANSITIONS=148} [2024-06-14 11:19:28,707 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2024-06-14 11:19:28,707 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 148 transitions, 1760 flow [2024-06-14 11:19:28,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-06-14 11:19:28,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:28,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:28,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 11:19:28,708 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:28,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:28,708 INFO L85 PathProgramCache]: Analyzing trace with hash 2096306960, now seen corresponding path program 6 times [2024-06-14 11:19:28,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:28,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614269299] [2024-06-14 11:19:28,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:28,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:28,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:28,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:28,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614269299] [2024-06-14 11:19:28,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614269299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:28,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:28,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:28,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708737083] [2024-06-14 11:19:28,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:28,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:28,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:28,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:28,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:28,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:28,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 148 transitions, 1760 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-06-14 11:19:28,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:28,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:28,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:29,515 INFO L124 PetriNetUnfolderBase]: 2475/4332 cut-off events. [2024-06-14 11:19:29,515 INFO L125 PetriNetUnfolderBase]: For 105250/105267 co-relation queries the response was YES. [2024-06-14 11:19:29,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23421 conditions, 4332 events. 2475/4332 cut-off events. For 105250/105267 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 29405 event pairs, 851 based on Foata normal form. 48/4376 useless extension candidates. Maximal degree in co-relation 23352. Up to 2675 conditions per place. [2024-06-14 11:19:29,547 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 137 selfloop transitions, 47 changer transitions 0/190 dead transitions. [2024-06-14 11:19:29,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 190 transitions, 2438 flow [2024-06-14 11:19:29,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:29,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:29,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 11:19:29,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6392857142857142 [2024-06-14 11:19:29,549 INFO L175 Difference]: Start difference. First operand has 138 places, 148 transitions, 1760 flow. Second operand 7 states and 179 transitions. [2024-06-14 11:19:29,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 190 transitions, 2438 flow [2024-06-14 11:19:29,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 190 transitions, 2318 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:29,660 INFO L231 Difference]: Finished difference. Result has 141 places, 150 transitions, 1824 flow [2024-06-14 11:19:29,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1640, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1824, PETRI_PLACES=141, PETRI_TRANSITIONS=150} [2024-06-14 11:19:29,669 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-06-14 11:19:29,669 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 150 transitions, 1824 flow [2024-06-14 11:19:29,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-06-14 11:19:29,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:29,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:29,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 11:19:29,671 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:29,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:29,672 INFO L85 PathProgramCache]: Analyzing trace with hash 2102032412, now seen corresponding path program 1 times [2024-06-14 11:19:29,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:29,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389591212] [2024-06-14 11:19:29,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:29,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:29,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:29,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:29,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:29,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389591212] [2024-06-14 11:19:29,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389591212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:29,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:29,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:29,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613775809] [2024-06-14 11:19:29,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:29,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:29,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:29,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:29,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:29,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:29,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 150 transitions, 1824 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-06-14 11:19:29,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:29,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:29,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:30,460 INFO L124 PetriNetUnfolderBase]: 2584/4521 cut-off events. [2024-06-14 11:19:30,461 INFO L125 PetriNetUnfolderBase]: For 114412/114429 co-relation queries the response was YES. [2024-06-14 11:19:30,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24406 conditions, 4521 events. 2584/4521 cut-off events. For 114412/114429 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 31060 event pairs, 908 based on Foata normal form. 48/4563 useless extension candidates. Maximal degree in co-relation 24335. Up to 3238 conditions per place. [2024-06-14 11:19:30,492 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 129 selfloop transitions, 55 changer transitions 5/195 dead transitions. [2024-06-14 11:19:30,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 195 transitions, 2452 flow [2024-06-14 11:19:30,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:19:30,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:19:30,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-14 11:19:30,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027777777777777 [2024-06-14 11:19:30,494 INFO L175 Difference]: Start difference. First operand has 141 places, 150 transitions, 1824 flow. Second operand 9 states and 217 transitions. [2024-06-14 11:19:30,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 195 transitions, 2452 flow [2024-06-14 11:19:30,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 195 transitions, 2311 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:30,647 INFO L231 Difference]: Finished difference. Result has 145 places, 149 transitions, 1817 flow [2024-06-14 11:19:30,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1683, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1817, PETRI_PLACES=145, PETRI_TRANSITIONS=149} [2024-06-14 11:19:30,647 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2024-06-14 11:19:30,648 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 149 transitions, 1817 flow [2024-06-14 11:19:30,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-06-14 11:19:30,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:30,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:30,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 11:19:30,648 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:30,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:30,649 INFO L85 PathProgramCache]: Analyzing trace with hash 73521636, now seen corresponding path program 2 times [2024-06-14 11:19:30,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:30,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627623755] [2024-06-14 11:19:30,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:30,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:30,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:30,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:30,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627623755] [2024-06-14 11:19:30,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627623755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:30,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:30,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:30,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306707046] [2024-06-14 11:19:30,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:30,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:30,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:30,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:30,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:30,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:30,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 149 transitions, 1817 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:30,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:30,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:30,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:31,289 INFO L124 PetriNetUnfolderBase]: 2407/4220 cut-off events. [2024-06-14 11:19:31,290 INFO L125 PetriNetUnfolderBase]: For 101398/101398 co-relation queries the response was YES. [2024-06-14 11:19:31,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23179 conditions, 4220 events. 2407/4220 cut-off events. For 101398/101398 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 28467 event pairs, 992 based on Foata normal form. 1/4217 useless extension candidates. Maximal degree in co-relation 23107. Up to 3849 conditions per place. [2024-06-14 11:19:31,325 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 135 selfloop transitions, 18 changer transitions 0/159 dead transitions. [2024-06-14 11:19:31,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 159 transitions, 2152 flow [2024-06-14 11:19:31,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:19:31,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:19:31,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2024-06-14 11:19:31,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-06-14 11:19:31,327 INFO L175 Difference]: Start difference. First operand has 145 places, 149 transitions, 1817 flow. Second operand 5 states and 112 transitions. [2024-06-14 11:19:31,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 159 transitions, 2152 flow [2024-06-14 11:19:31,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 159 transitions, 2004 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-14 11:19:31,463 INFO L231 Difference]: Finished difference. Result has 143 places, 149 transitions, 1711 flow [2024-06-14 11:19:31,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1669, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1711, PETRI_PLACES=143, PETRI_TRANSITIONS=149} [2024-06-14 11:19:31,464 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 102 predicate places. [2024-06-14 11:19:31,464 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 149 transitions, 1711 flow [2024-06-14 11:19:31,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:31,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:31,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:31,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 11:19:31,465 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:31,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:31,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1880735352, now seen corresponding path program 7 times [2024-06-14 11:19:31,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:31,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668677220] [2024-06-14 11:19:31,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:31,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:31,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:31,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:31,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:31,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668677220] [2024-06-14 11:19:31,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668677220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:31,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:31,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:31,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626368407] [2024-06-14 11:19:31,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:31,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:31,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:31,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:31,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:31,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:31,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 149 transitions, 1711 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-06-14 11:19:31,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:31,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:31,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:32,212 INFO L124 PetriNetUnfolderBase]: 2516/4402 cut-off events. [2024-06-14 11:19:32,212 INFO L125 PetriNetUnfolderBase]: For 125496/125513 co-relation queries the response was YES. [2024-06-14 11:19:32,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23653 conditions, 4402 events. 2516/4402 cut-off events. For 125496/125513 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 29967 event pairs, 1035 based on Foata normal form. 54/4444 useless extension candidates. Maximal degree in co-relation 23580. Up to 3637 conditions per place. [2024-06-14 11:19:32,248 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 118 selfloop transitions, 68 changer transitions 3/195 dead transitions. [2024-06-14 11:19:32,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 195 transitions, 2517 flow [2024-06-14 11:19:32,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:19:32,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:19:32,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-14 11:19:32,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055555555555555 [2024-06-14 11:19:32,250 INFO L175 Difference]: Start difference. First operand has 143 places, 149 transitions, 1711 flow. Second operand 9 states and 218 transitions. [2024-06-14 11:19:32,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 195 transitions, 2517 flow [2024-06-14 11:19:32,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 195 transitions, 2481 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:32,423 INFO L231 Difference]: Finished difference. Result has 148 places, 149 transitions, 1859 flow [2024-06-14 11:19:32,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1675, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1859, PETRI_PLACES=148, PETRI_TRANSITIONS=149} [2024-06-14 11:19:32,424 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 107 predicate places. [2024-06-14 11:19:32,424 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 149 transitions, 1859 flow [2024-06-14 11:19:32,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-06-14 11:19:32,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:32,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:32,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 11:19:32,425 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:32,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:32,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1894273666, now seen corresponding path program 2 times [2024-06-14 11:19:32,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:32,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116690105] [2024-06-14 11:19:32,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:32,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:32,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:32,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:32,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:32,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116690105] [2024-06-14 11:19:32,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116690105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:32,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:32,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:32,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048382356] [2024-06-14 11:19:32,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:32,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:32,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:32,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:32,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:32,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:32,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 149 transitions, 1859 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-06-14 11:19:32,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:32,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:32,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:33,202 INFO L124 PetriNetUnfolderBase]: 2615/4601 cut-off events. [2024-06-14 11:19:33,203 INFO L125 PetriNetUnfolderBase]: For 133684/133701 co-relation queries the response was YES. [2024-06-14 11:19:33,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24926 conditions, 4601 events. 2615/4601 cut-off events. For 133684/133701 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 31756 event pairs, 1035 based on Foata normal form. 48/4637 useless extension candidates. Maximal degree in co-relation 24852. Up to 3573 conditions per place. [2024-06-14 11:19:33,253 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 123 selfloop transitions, 70 changer transitions 6/205 dead transitions. [2024-06-14 11:19:33,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 205 transitions, 2741 flow [2024-06-14 11:19:33,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:19:33,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:19:33,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-14 11:19:33,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.605 [2024-06-14 11:19:33,254 INFO L175 Difference]: Start difference. First operand has 148 places, 149 transitions, 1859 flow. Second operand 10 states and 242 transitions. [2024-06-14 11:19:33,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 205 transitions, 2741 flow [2024-06-14 11:19:33,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 205 transitions, 2570 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-14 11:19:33,447 INFO L231 Difference]: Finished difference. Result has 151 places, 149 transitions, 1873 flow [2024-06-14 11:19:33,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1688, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1873, PETRI_PLACES=151, PETRI_TRANSITIONS=149} [2024-06-14 11:19:33,447 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 110 predicate places. [2024-06-14 11:19:33,448 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 149 transitions, 1873 flow [2024-06-14 11:19:33,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-06-14 11:19:33,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:33,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:33,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 11:19:33,449 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:33,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:33,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1628576386, now seen corresponding path program 3 times [2024-06-14 11:19:33,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:33,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376486012] [2024-06-14 11:19:33,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:33,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:33,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:33,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:33,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:33,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376486012] [2024-06-14 11:19:33,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376486012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:33,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:33,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:33,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458774041] [2024-06-14 11:19:33,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:33,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:33,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:33,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:33,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:33,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:33,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 149 transitions, 1873 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-06-14 11:19:33,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:33,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:33,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:34,316 INFO L124 PetriNetUnfolderBase]: 2760/4832 cut-off events. [2024-06-14 11:19:34,316 INFO L125 PetriNetUnfolderBase]: For 147546/147563 co-relation queries the response was YES. [2024-06-14 11:19:34,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26043 conditions, 4832 events. 2760/4832 cut-off events. For 147546/147563 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 33618 event pairs, 1002 based on Foata normal form. 48/4864 useless extension candidates. Maximal degree in co-relation 25968. Up to 2795 conditions per place. [2024-06-14 11:19:34,357 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 115 selfloop transitions, 75 changer transitions 8/204 dead transitions. [2024-06-14 11:19:34,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 204 transitions, 2739 flow [2024-06-14 11:19:34,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:19:34,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:19:34,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-14 11:19:34,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-14 11:19:34,359 INFO L175 Difference]: Start difference. First operand has 151 places, 149 transitions, 1873 flow. Second operand 9 states and 225 transitions. [2024-06-14 11:19:34,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 204 transitions, 2739 flow [2024-06-14 11:19:34,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 204 transitions, 2561 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-14 11:19:34,567 INFO L231 Difference]: Finished difference. Result has 151 places, 146 transitions, 1757 flow [2024-06-14 11:19:34,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1639, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1757, PETRI_PLACES=151, PETRI_TRANSITIONS=146} [2024-06-14 11:19:34,567 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 110 predicate places. [2024-06-14 11:19:34,567 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 146 transitions, 1757 flow [2024-06-14 11:19:34,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 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) [2024-06-14 11:19:34,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:34,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:34,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 11:19:34,568 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:34,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:34,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1792060004, now seen corresponding path program 3 times [2024-06-14 11:19:34,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:34,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796942569] [2024-06-14 11:19:34,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:34,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:34,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:34,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:34,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796942569] [2024-06-14 11:19:34,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796942569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:34,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:34,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:34,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563583694] [2024-06-14 11:19:34,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:34,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:34,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:34,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:34,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:34,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:34,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 146 transitions, 1757 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:34,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:34,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:34,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:35,101 INFO L124 PetriNetUnfolderBase]: 2484/4368 cut-off events. [2024-06-14 11:19:35,101 INFO L125 PetriNetUnfolderBase]: For 132422/132422 co-relation queries the response was YES. [2024-06-14 11:19:35,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24357 conditions, 4368 events. 2484/4368 cut-off events. For 132422/132422 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 29881 event pairs, 1053 based on Foata normal form. 1/4365 useless extension candidates. Maximal degree in co-relation 24281. Up to 3987 conditions per place. [2024-06-14 11:19:35,136 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 133 selfloop transitions, 23 changer transitions 0/162 dead transitions. [2024-06-14 11:19:35,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 162 transitions, 2157 flow [2024-06-14 11:19:35,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:35,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:35,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-14 11:19:35,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-14 11:19:35,137 INFO L175 Difference]: Start difference. First operand has 151 places, 146 transitions, 1757 flow. Second operand 6 states and 128 transitions. [2024-06-14 11:19:35,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 162 transitions, 2157 flow [2024-06-14 11:19:35,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 162 transitions, 1922 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-14 11:19:35,282 INFO L231 Difference]: Finished difference. Result has 150 places, 151 transitions, 1645 flow [2024-06-14 11:19:35,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1530, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1645, PETRI_PLACES=150, PETRI_TRANSITIONS=151} [2024-06-14 11:19:35,282 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2024-06-14 11:19:35,283 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 151 transitions, 1645 flow [2024-06-14 11:19:35,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:35,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:35,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:35,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 11:19:35,283 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:35,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:35,284 INFO L85 PathProgramCache]: Analyzing trace with hash -2015783543, now seen corresponding path program 1 times [2024-06-14 11:19:35,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:35,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722593007] [2024-06-14 11:19:35,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:35,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:35,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:35,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722593007] [2024-06-14 11:19:35,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722593007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:35,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:35,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:35,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930190359] [2024-06-14 11:19:35,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:35,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:35,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:35,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:35,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:35,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 11:19:35,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 151 transitions, 1645 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 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) [2024-06-14 11:19:35,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:35,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 11:19:35,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:35,827 INFO L124 PetriNetUnfolderBase]: 2333/4144 cut-off events. [2024-06-14 11:19:35,828 INFO L125 PetriNetUnfolderBase]: For 126279/126288 co-relation queries the response was YES. [2024-06-14 11:19:35,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22203 conditions, 4144 events. 2333/4144 cut-off events. For 126279/126288 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 28414 event pairs, 926 based on Foata normal form. 17/4137 useless extension candidates. Maximal degree in co-relation 22126. Up to 3620 conditions per place. [2024-06-14 11:19:35,863 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 125 selfloop transitions, 29 changer transitions 0/170 dead transitions. [2024-06-14 11:19:35,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 170 transitions, 2043 flow [2024-06-14 11:19:35,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:35,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:35,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-14 11:19:35,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-14 11:19:35,864 INFO L175 Difference]: Start difference. First operand has 150 places, 151 transitions, 1645 flow. Second operand 6 states and 139 transitions. [2024-06-14 11:19:35,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 170 transitions, 2043 flow [2024-06-14 11:19:36,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 170 transitions, 1979 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:36,031 INFO L231 Difference]: Finished difference. Result has 153 places, 153 transitions, 1689 flow [2024-06-14 11:19:36,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1689, PETRI_PLACES=153, PETRI_TRANSITIONS=153} [2024-06-14 11:19:36,032 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 112 predicate places. [2024-06-14 11:19:36,032 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 153 transitions, 1689 flow [2024-06-14 11:19:36,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 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) [2024-06-14 11:19:36,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:36,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:36,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 11:19:36,032 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:36,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:36,033 INFO L85 PathProgramCache]: Analyzing trace with hash -120741913, now seen corresponding path program 2 times [2024-06-14 11:19:36,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:36,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739866477] [2024-06-14 11:19:36,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:36,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:36,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:36,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:36,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:36,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739866477] [2024-06-14 11:19:36,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739866477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:36,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:36,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:36,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309243866] [2024-06-14 11:19:36,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:36,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:36,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:36,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:36,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:36,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 11:19:36,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 153 transitions, 1689 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 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) [2024-06-14 11:19:36,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:36,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 11:19:36,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:36,565 INFO L124 PetriNetUnfolderBase]: 2373/4201 cut-off events. [2024-06-14 11:19:36,565 INFO L125 PetriNetUnfolderBase]: For 133885/133894 co-relation queries the response was YES. [2024-06-14 11:19:36,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22915 conditions, 4201 events. 2373/4201 cut-off events. For 133885/133894 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28727 event pairs, 978 based on Foata normal form. 17/4190 useless extension candidates. Maximal degree in co-relation 22837. Up to 3702 conditions per place. [2024-06-14 11:19:36,598 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 116 selfloop transitions, 39 changer transitions 0/171 dead transitions. [2024-06-14 11:19:36,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 171 transitions, 2229 flow [2024-06-14 11:19:36,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:36,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:36,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-14 11:19:36,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-14 11:19:36,599 INFO L175 Difference]: Start difference. First operand has 153 places, 153 transitions, 1689 flow. Second operand 6 states and 139 transitions. [2024-06-14 11:19:36,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 171 transitions, 2229 flow [2024-06-14 11:19:36,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 171 transitions, 2157 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:36,784 INFO L231 Difference]: Finished difference. Result has 155 places, 155 transitions, 1744 flow [2024-06-14 11:19:36,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1617, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1744, PETRI_PLACES=155, PETRI_TRANSITIONS=155} [2024-06-14 11:19:36,785 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 114 predicate places. [2024-06-14 11:19:36,785 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 155 transitions, 1744 flow [2024-06-14 11:19:36,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 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) [2024-06-14 11:19:36,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:36,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:36,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 11:19:36,785 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:36,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:36,786 INFO L85 PathProgramCache]: Analyzing trace with hash -107409433, now seen corresponding path program 3 times [2024-06-14 11:19:36,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:36,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894546339] [2024-06-14 11:19:36,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:36,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:36,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:36,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:36,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:36,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894546339] [2024-06-14 11:19:36,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894546339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:36,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:36,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:36,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738431807] [2024-06-14 11:19:36,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:36,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:36,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:36,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:36,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:36,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 11:19:36,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 155 transitions, 1744 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 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) [2024-06-14 11:19:36,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:36,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 11:19:36,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:37,336 INFO L124 PetriNetUnfolderBase]: 2438/4302 cut-off events. [2024-06-14 11:19:37,336 INFO L125 PetriNetUnfolderBase]: For 144514/144523 co-relation queries the response was YES. [2024-06-14 11:19:37,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23733 conditions, 4302 events. 2438/4302 cut-off events. For 144514/144523 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 29574 event pairs, 944 based on Foata normal form. 17/4291 useless extension candidates. Maximal degree in co-relation 23654. Up to 3605 conditions per place. [2024-06-14 11:19:37,369 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 119 selfloop transitions, 44 changer transitions 0/179 dead transitions. [2024-06-14 11:19:37,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 179 transitions, 2422 flow [2024-06-14 11:19:37,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:37,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:37,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 11:19:37,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 11:19:37,370 INFO L175 Difference]: Start difference. First operand has 155 places, 155 transitions, 1744 flow. Second operand 6 states and 144 transitions. [2024-06-14 11:19:37,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 179 transitions, 2422 flow [2024-06-14 11:19:37,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 179 transitions, 2319 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:37,556 INFO L231 Difference]: Finished difference. Result has 157 places, 158 transitions, 1796 flow [2024-06-14 11:19:37,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1641, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1796, PETRI_PLACES=157, PETRI_TRANSITIONS=158} [2024-06-14 11:19:37,557 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 116 predicate places. [2024-06-14 11:19:37,557 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 158 transitions, 1796 flow [2024-06-14 11:19:37,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 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) [2024-06-14 11:19:37,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:37,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:37,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 11:19:37,558 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:37,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:37,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1639393537, now seen corresponding path program 1 times [2024-06-14 11:19:37,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:37,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404797978] [2024-06-14 11:19:37,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:37,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:37,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:37,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:37,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404797978] [2024-06-14 11:19:37,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404797978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:37,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:37,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:37,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893766830] [2024-06-14 11:19:37,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:37,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:37,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:37,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:37,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:37,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:37,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 158 transitions, 1796 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:37,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:37,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:37,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:38,167 INFO L124 PetriNetUnfolderBase]: 2529/4436 cut-off events. [2024-06-14 11:19:38,167 INFO L125 PetriNetUnfolderBase]: For 148775/148786 co-relation queries the response was YES. [2024-06-14 11:19:38,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24623 conditions, 4436 events. 2529/4436 cut-off events. For 148775/148786 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 30189 event pairs, 912 based on Foata normal form. 14/4448 useless extension candidates. Maximal degree in co-relation 24543. Up to 3948 conditions per place. [2024-06-14 11:19:38,200 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 160 selfloop transitions, 23 changer transitions 0/189 dead transitions. [2024-06-14 11:19:38,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 189 transitions, 2344 flow [2024-06-14 11:19:38,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:19:38,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:19:38,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-14 11:19:38,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-14 11:19:38,202 INFO L175 Difference]: Start difference. First operand has 157 places, 158 transitions, 1796 flow. Second operand 8 states and 174 transitions. [2024-06-14 11:19:38,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 189 transitions, 2344 flow [2024-06-14 11:19:38,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 189 transitions, 2265 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-14 11:19:38,386 INFO L231 Difference]: Finished difference. Result has 163 places, 159 transitions, 1776 flow [2024-06-14 11:19:38,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1717, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1776, PETRI_PLACES=163, PETRI_TRANSITIONS=159} [2024-06-14 11:19:38,386 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 122 predicate places. [2024-06-14 11:19:38,386 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 159 transitions, 1776 flow [2024-06-14 11:19:38,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:38,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:38,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:38,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 11:19:38,387 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:38,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:38,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1647964417, now seen corresponding path program 2 times [2024-06-14 11:19:38,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:38,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950763022] [2024-06-14 11:19:38,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:38,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:38,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:38,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:38,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950763022] [2024-06-14 11:19:38,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950763022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:38,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:38,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:38,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022811643] [2024-06-14 11:19:38,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:38,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:38,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:38,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:38,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:38,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:38,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 159 transitions, 1776 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:38,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:38,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:38,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:39,044 INFO L124 PetriNetUnfolderBase]: 2557/4480 cut-off events. [2024-06-14 11:19:39,044 INFO L125 PetriNetUnfolderBase]: For 156819/156830 co-relation queries the response was YES. [2024-06-14 11:19:39,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24907 conditions, 4480 events. 2557/4480 cut-off events. For 156819/156830 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 30622 event pairs, 1006 based on Foata normal form. 16/4494 useless extension candidates. Maximal degree in co-relation 24825. Up to 4068 conditions per place. [2024-06-14 11:19:39,080 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 157 selfloop transitions, 20 changer transitions 0/183 dead transitions. [2024-06-14 11:19:39,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 183 transitions, 2216 flow [2024-06-14 11:19:39,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:19:39,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:19:39,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-14 11:19:39,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-14 11:19:39,084 INFO L175 Difference]: Start difference. First operand has 163 places, 159 transitions, 1776 flow. Second operand 8 states and 168 transitions. [2024-06-14 11:19:39,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 183 transitions, 2216 flow [2024-06-14 11:19:39,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 183 transitions, 2177 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:39,268 INFO L231 Difference]: Finished difference. Result has 166 places, 160 transitions, 1795 flow [2024-06-14 11:19:39,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1738, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1795, PETRI_PLACES=166, PETRI_TRANSITIONS=160} [2024-06-14 11:19:39,269 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-14 11:19:39,269 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 160 transitions, 1795 flow [2024-06-14 11:19:39,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:39,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:39,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:39,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 11:19:39,270 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:39,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:39,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1642253473, now seen corresponding path program 1 times [2024-06-14 11:19:39,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:39,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843064740] [2024-06-14 11:19:39,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:39,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:39,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:39,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:39,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:39,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843064740] [2024-06-14 11:19:39,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843064740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:39,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:39,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:39,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863517675] [2024-06-14 11:19:39,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:39,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:39,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:39,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:39,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:39,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:39,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 160 transitions, 1795 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:39,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:39,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:39,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:39,887 INFO L124 PetriNetUnfolderBase]: 2559/4485 cut-off events. [2024-06-14 11:19:39,887 INFO L125 PetriNetUnfolderBase]: For 158967/158984 co-relation queries the response was YES. [2024-06-14 11:19:39,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25072 conditions, 4485 events. 2559/4485 cut-off events. For 158967/158984 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 30645 event pairs, 1017 based on Foata normal form. 14/4495 useless extension candidates. Maximal degree in co-relation 24989. Up to 3965 conditions per place. [2024-06-14 11:19:39,922 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 134 selfloop transitions, 55 changer transitions 1/196 dead transitions. [2024-06-14 11:19:39,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 196 transitions, 2439 flow [2024-06-14 11:19:39,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:19:39,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:19:39,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-14 11:19:39,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-14 11:19:39,924 INFO L175 Difference]: Start difference. First operand has 166 places, 160 transitions, 1795 flow. Second operand 9 states and 207 transitions. [2024-06-14 11:19:39,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 196 transitions, 2439 flow [2024-06-14 11:19:40,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 196 transitions, 2400 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 11:19:40,130 INFO L231 Difference]: Finished difference. Result has 169 places, 162 transitions, 1893 flow [2024-06-14 11:19:40,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1756, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1893, PETRI_PLACES=169, PETRI_TRANSITIONS=162} [2024-06-14 11:19:40,130 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2024-06-14 11:19:40,130 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 162 transitions, 1893 flow [2024-06-14 11:19:40,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:40,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:40,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:40,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 11:19:40,131 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:40,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:40,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1647967393, now seen corresponding path program 2 times [2024-06-14 11:19:40,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:40,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935572953] [2024-06-14 11:19:40,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:40,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:40,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:40,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:40,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935572953] [2024-06-14 11:19:40,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935572953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:40,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:40,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:40,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105429449] [2024-06-14 11:19:40,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:40,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:40,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:40,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:40,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:40,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:40,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 162 transitions, 1893 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:40,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:40,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:40,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:40,766 INFO L124 PetriNetUnfolderBase]: 2578/4516 cut-off events. [2024-06-14 11:19:40,766 INFO L125 PetriNetUnfolderBase]: For 168031/168048 co-relation queries the response was YES. [2024-06-14 11:19:40,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25699 conditions, 4516 events. 2578/4516 cut-off events. For 168031/168048 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 30846 event pairs, 1017 based on Foata normal form. 13/4525 useless extension candidates. Maximal degree in co-relation 25615. Up to 3984 conditions per place. [2024-06-14 11:19:40,804 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 127 selfloop transitions, 61 changer transitions 1/195 dead transitions. [2024-06-14 11:19:40,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 195 transitions, 2593 flow [2024-06-14 11:19:40,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:19:40,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:19:40,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-14 11:19:40,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-14 11:19:40,806 INFO L175 Difference]: Start difference. First operand has 169 places, 162 transitions, 1893 flow. Second operand 8 states and 183 transitions. [2024-06-14 11:19:40,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 195 transitions, 2593 flow [2024-06-14 11:19:41,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 195 transitions, 2487 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 11:19:41,053 INFO L231 Difference]: Finished difference. Result has 172 places, 168 transitions, 2022 flow [2024-06-14 11:19:41,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1795, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2022, PETRI_PLACES=172, PETRI_TRANSITIONS=168} [2024-06-14 11:19:41,054 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-14 11:19:41,054 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 168 transitions, 2022 flow [2024-06-14 11:19:41,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:41,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:41,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:41,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 11:19:41,055 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:41,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:41,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1934851747, now seen corresponding path program 3 times [2024-06-14 11:19:41,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:41,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533233645] [2024-06-14 11:19:41,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:41,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:41,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:41,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:41,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:41,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533233645] [2024-06-14 11:19:41,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533233645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:41,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:41,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:41,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313909076] [2024-06-14 11:19:41,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:41,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:41,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:41,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:41,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:41,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:41,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 168 transitions, 2022 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:41,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:41,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:41,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:41,701 INFO L124 PetriNetUnfolderBase]: 2558/4483 cut-off events. [2024-06-14 11:19:41,701 INFO L125 PetriNetUnfolderBase]: For 174896/174896 co-relation queries the response was YES. [2024-06-14 11:19:41,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25489 conditions, 4483 events. 2558/4483 cut-off events. For 174896/174896 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 30543 event pairs, 1005 based on Foata normal form. 8/4487 useless extension candidates. Maximal degree in co-relation 25403. Up to 4070 conditions per place. [2024-06-14 11:19:41,738 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 158 selfloop transitions, 19 changer transitions 0/183 dead transitions. [2024-06-14 11:19:41,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 183 transitions, 2431 flow [2024-06-14 11:19:41,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:41,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:41,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-14 11:19:41,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-14 11:19:41,740 INFO L175 Difference]: Start difference. First operand has 172 places, 168 transitions, 2022 flow. Second operand 6 states and 130 transitions. [2024-06-14 11:19:41,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 183 transitions, 2431 flow [2024-06-14 11:19:41,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 183 transitions, 2346 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:41,967 INFO L231 Difference]: Finished difference. Result has 174 places, 168 transitions, 1980 flow [2024-06-14 11:19:41,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1937, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1980, PETRI_PLACES=174, PETRI_TRANSITIONS=168} [2024-06-14 11:19:41,967 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 133 predicate places. [2024-06-14 11:19:41,967 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 168 transitions, 1980 flow [2024-06-14 11:19:41,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:41,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:41,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:41,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 11:19:41,968 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:41,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:41,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1757544643, now seen corresponding path program 3 times [2024-06-14 11:19:41,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:41,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892985440] [2024-06-14 11:19:41,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:41,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:41,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:42,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:42,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:42,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892985440] [2024-06-14 11:19:42,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892985440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:42,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:42,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:42,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282184643] [2024-06-14 11:19:42,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:42,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:42,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:42,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:42,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:42,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:42,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 168 transitions, 1980 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:42,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:42,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:42,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:42,617 INFO L124 PetriNetUnfolderBase]: 2552/4480 cut-off events. [2024-06-14 11:19:42,617 INFO L125 PetriNetUnfolderBase]: For 175252/175269 co-relation queries the response was YES. [2024-06-14 11:19:42,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25409 conditions, 4480 events. 2552/4480 cut-off events. For 175252/175269 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 30609 event pairs, 1009 based on Foata normal form. 14/4490 useless extension candidates. Maximal degree in co-relation 25322. Up to 3988 conditions per place. [2024-06-14 11:19:42,654 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 134 selfloop transitions, 47 changer transitions 1/188 dead transitions. [2024-06-14 11:19:42,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 188 transitions, 2478 flow [2024-06-14 11:19:42,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:42,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:42,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 11:19:42,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 11:19:42,658 INFO L175 Difference]: Start difference. First operand has 174 places, 168 transitions, 1980 flow. Second operand 6 states and 144 transitions. [2024-06-14 11:19:42,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 188 transitions, 2478 flow [2024-06-14 11:19:42,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 188 transitions, 2426 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:42,927 INFO L231 Difference]: Finished difference. Result has 175 places, 167 transitions, 2022 flow [2024-06-14 11:19:42,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1928, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2022, PETRI_PLACES=175, PETRI_TRANSITIONS=167} [2024-06-14 11:19:42,928 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-06-14 11:19:42,928 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 167 transitions, 2022 flow [2024-06-14 11:19:42,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:42,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:42,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:42,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 11:19:42,929 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:42,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:42,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1786291941, now seen corresponding path program 4 times [2024-06-14 11:19:42,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:42,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919333312] [2024-06-14 11:19:42,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:42,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:43,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:43,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:43,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919333312] [2024-06-14 11:19:43,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919333312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:43,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:43,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:43,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633325838] [2024-06-14 11:19:43,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:43,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:43,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:43,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:43,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:43,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:43,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 167 transitions, 2022 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:43,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:43,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:43,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:43,649 INFO L124 PetriNetUnfolderBase]: 2517/4415 cut-off events. [2024-06-14 11:19:43,650 INFO L125 PetriNetUnfolderBase]: For 180913/180930 co-relation queries the response was YES. [2024-06-14 11:19:43,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25262 conditions, 4415 events. 2517/4415 cut-off events. For 180913/180930 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 30017 event pairs, 991 based on Foata normal form. 14/4425 useless extension candidates. Maximal degree in co-relation 25174. Up to 3929 conditions per place. [2024-06-14 11:19:43,681 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 132 selfloop transitions, 48 changer transitions 2/188 dead transitions. [2024-06-14 11:19:43,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 188 transitions, 2438 flow [2024-06-14 11:19:43,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:19:43,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:19:43,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-14 11:19:43,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55625 [2024-06-14 11:19:43,683 INFO L175 Difference]: Start difference. First operand has 175 places, 167 transitions, 2022 flow. Second operand 8 states and 178 transitions. [2024-06-14 11:19:43,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 188 transitions, 2438 flow [2024-06-14 11:19:43,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 188 transitions, 2352 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:43,956 INFO L231 Difference]: Finished difference. Result has 178 places, 165 transitions, 2013 flow [2024-06-14 11:19:43,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1936, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2013, PETRI_PLACES=178, PETRI_TRANSITIONS=165} [2024-06-14 11:19:43,957 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 137 predicate places. [2024-06-14 11:19:43,957 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 165 transitions, 2013 flow [2024-06-14 11:19:43,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:43,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:43,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:43,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 11:19:43,958 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:43,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:43,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1934854723, now seen corresponding path program 5 times [2024-06-14 11:19:43,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:43,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913873151] [2024-06-14 11:19:43,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:43,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:43,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:44,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:44,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:44,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913873151] [2024-06-14 11:19:44,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913873151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:44,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:44,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:44,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784998297] [2024-06-14 11:19:44,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:44,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:44,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:44,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:44,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:44,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:44,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 165 transitions, 2013 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:44,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:44,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:44,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:44,518 INFO L124 PetriNetUnfolderBase]: 2404/4215 cut-off events. [2024-06-14 11:19:44,518 INFO L125 PetriNetUnfolderBase]: For 178780/178786 co-relation queries the response was YES. [2024-06-14 11:19:44,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24486 conditions, 4215 events. 2404/4215 cut-off events. For 178780/178786 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 28408 event pairs, 952 based on Foata normal form. 5/4213 useless extension candidates. Maximal degree in co-relation 24398. Up to 3704 conditions per place. [2024-06-14 11:19:44,552 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 114 selfloop transitions, 57 changer transitions 2/179 dead transitions. [2024-06-14 11:19:44,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 179 transitions, 2393 flow [2024-06-14 11:19:44,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:44,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:44,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-14 11:19:44,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-14 11:19:44,553 INFO L175 Difference]: Start difference. First operand has 178 places, 165 transitions, 2013 flow. Second operand 7 states and 154 transitions. [2024-06-14 11:19:44,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 179 transitions, 2393 flow [2024-06-14 11:19:44,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 179 transitions, 2212 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-14 11:19:44,840 INFO L231 Difference]: Finished difference. Result has 174 places, 163 transitions, 1929 flow [2024-06-14 11:19:44,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1832, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1929, PETRI_PLACES=174, PETRI_TRANSITIONS=163} [2024-06-14 11:19:44,840 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 133 predicate places. [2024-06-14 11:19:44,841 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 163 transitions, 1929 flow [2024-06-14 11:19:44,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:44,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:44,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:44,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 11:19:44,841 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:44,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:44,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1935220709, now seen corresponding path program 1 times [2024-06-14 11:19:44,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:44,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945613453] [2024-06-14 11:19:44,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:44,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:44,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:44,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:44,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945613453] [2024-06-14 11:19:44,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945613453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:44,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:44,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:44,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818568875] [2024-06-14 11:19:44,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:44,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:44,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:44,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:44,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:44,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:44,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 163 transitions, 1929 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:44,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:44,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:44,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:45,414 INFO L124 PetriNetUnfolderBase]: 2341/4105 cut-off events. [2024-06-14 11:19:45,415 INFO L125 PetriNetUnfolderBase]: For 182459/182459 co-relation queries the response was YES. [2024-06-14 11:19:45,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24071 conditions, 4105 events. 2341/4105 cut-off events. For 182459/182459 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 27508 event pairs, 879 based on Foata normal form. 6/4107 useless extension candidates. Maximal degree in co-relation 23984. Up to 3630 conditions per place. [2024-06-14 11:19:45,449 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 156 selfloop transitions, 23 changer transitions 0/185 dead transitions. [2024-06-14 11:19:45,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 185 transitions, 2407 flow [2024-06-14 11:19:45,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:45,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:45,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-14 11:19:45,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5541666666666667 [2024-06-14 11:19:45,451 INFO L175 Difference]: Start difference. First operand has 174 places, 163 transitions, 1929 flow. Second operand 6 states and 133 transitions. [2024-06-14 11:19:45,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 185 transitions, 2407 flow [2024-06-14 11:19:45,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 185 transitions, 2254 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 11:19:45,760 INFO L231 Difference]: Finished difference. Result has 173 places, 167 transitions, 1894 flow [2024-06-14 11:19:45,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1776, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1894, PETRI_PLACES=173, PETRI_TRANSITIONS=167} [2024-06-14 11:19:45,761 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2024-06-14 11:19:45,761 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 167 transitions, 1894 flow [2024-06-14 11:19:45,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:45,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:45,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:45,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 11:19:45,762 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:45,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:45,762 INFO L85 PathProgramCache]: Analyzing trace with hash 551600133, now seen corresponding path program 4 times [2024-06-14 11:19:45,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:45,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513169533] [2024-06-14 11:19:45,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:45,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:45,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:45,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:45,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513169533] [2024-06-14 11:19:45,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513169533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:45,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:45,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:45,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649539443] [2024-06-14 11:19:45,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:45,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:45,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:45,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:45,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:45,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:45,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 167 transitions, 1894 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:45,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:45,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:45,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:46,332 INFO L124 PetriNetUnfolderBase]: 2356/4134 cut-off events. [2024-06-14 11:19:46,333 INFO L125 PetriNetUnfolderBase]: For 190748/190748 co-relation queries the response was YES. [2024-06-14 11:19:46,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24326 conditions, 4134 events. 2356/4134 cut-off events. For 190748/190748 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27726 event pairs, 904 based on Foata normal form. 8/4138 useless extension candidates. Maximal degree in co-relation 24237. Up to 3717 conditions per place. [2024-06-14 11:19:46,370 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 154 selfloop transitions, 24 changer transitions 0/184 dead transitions. [2024-06-14 11:19:46,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 184 transitions, 2325 flow [2024-06-14 11:19:46,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:46,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:46,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-14 11:19:46,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-14 11:19:46,372 INFO L175 Difference]: Start difference. First operand has 173 places, 167 transitions, 1894 flow. Second operand 7 states and 147 transitions. [2024-06-14 11:19:46,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 184 transitions, 2325 flow [2024-06-14 11:19:46,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 184 transitions, 2268 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:46,701 INFO L231 Difference]: Finished difference. Result has 177 places, 168 transitions, 1910 flow [2024-06-14 11:19:46,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1839, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1910, PETRI_PLACES=177, PETRI_TRANSITIONS=168} [2024-06-14 11:19:46,702 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-14 11:19:46,702 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 168 transitions, 1910 flow [2024-06-14 11:19:46,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:46,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:46,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:46,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 11:19:46,703 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:46,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:46,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1332600505, now seen corresponding path program 1 times [2024-06-14 11:19:46,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:46,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106170238] [2024-06-14 11:19:46,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:46,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:46,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:46,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:46,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106170238] [2024-06-14 11:19:46,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106170238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:46,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:46,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:46,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706113960] [2024-06-14 11:19:46,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:46,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:46,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:46,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:46,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:46,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:46,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 168 transitions, 1910 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:46,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:46,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:46,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:47,270 INFO L124 PetriNetUnfolderBase]: 2353/4131 cut-off events. [2024-06-14 11:19:47,270 INFO L125 PetriNetUnfolderBase]: For 190163/190180 co-relation queries the response was YES. [2024-06-14 11:19:47,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24339 conditions, 4131 events. 2353/4131 cut-off events. For 190163/190180 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 27782 event pairs, 908 based on Foata normal form. 13/4135 useless extension candidates. Maximal degree in co-relation 24249. Up to 3688 conditions per place. [2024-06-14 11:19:47,307 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 145 selfloop transitions, 34 changer transitions 0/185 dead transitions. [2024-06-14 11:19:47,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 185 transitions, 2400 flow [2024-06-14 11:19:47,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:47,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:47,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-14 11:19:47,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2024-06-14 11:19:47,308 INFO L175 Difference]: Start difference. First operand has 177 places, 168 transitions, 1910 flow. Second operand 6 states and 137 transitions. [2024-06-14 11:19:47,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 185 transitions, 2400 flow [2024-06-14 11:19:47,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 185 transitions, 2335 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:47,627 INFO L231 Difference]: Finished difference. Result has 178 places, 168 transitions, 1919 flow [2024-06-14 11:19:47,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1845, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1919, PETRI_PLACES=178, PETRI_TRANSITIONS=168} [2024-06-14 11:19:47,628 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 137 predicate places. [2024-06-14 11:19:47,628 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 168 transitions, 1919 flow [2024-06-14 11:19:47,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:47,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:47,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:47,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 11:19:47,629 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:47,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:47,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1798518301, now seen corresponding path program 2 times [2024-06-14 11:19:47,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:47,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506213648] [2024-06-14 11:19:47,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:47,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:47,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:47,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:47,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:47,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506213648] [2024-06-14 11:19:47,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506213648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:47,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:47,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:47,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131514384] [2024-06-14 11:19:47,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:47,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:47,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:47,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:47,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:47,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:47,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 168 transitions, 1919 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:47,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:47,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:47,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:48,218 INFO L124 PetriNetUnfolderBase]: 2350/4130 cut-off events. [2024-06-14 11:19:48,219 INFO L125 PetriNetUnfolderBase]: For 196386/196397 co-relation queries the response was YES. [2024-06-14 11:19:48,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24361 conditions, 4130 events. 2350/4130 cut-off events. For 196386/196397 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27765 event pairs, 918 based on Foata normal form. 9/4133 useless extension candidates. Maximal degree in co-relation 24270. Up to 3685 conditions per place. [2024-06-14 11:19:48,252 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 135 selfloop transitions, 37 changer transitions 0/178 dead transitions. [2024-06-14 11:19:48,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 178 transitions, 2287 flow [2024-06-14 11:19:48,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:48,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:48,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-14 11:19:48,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5458333333333333 [2024-06-14 11:19:48,254 INFO L175 Difference]: Start difference. First operand has 178 places, 168 transitions, 1919 flow. Second operand 6 states and 131 transitions. [2024-06-14 11:19:48,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 178 transitions, 2287 flow [2024-06-14 11:19:48,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 178 transitions, 2191 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:48,678 INFO L231 Difference]: Finished difference. Result has 179 places, 168 transitions, 1903 flow [2024-06-14 11:19:48,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1823, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1903, PETRI_PLACES=179, PETRI_TRANSITIONS=168} [2024-06-14 11:19:48,678 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 138 predicate places. [2024-06-14 11:19:48,679 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 168 transitions, 1903 flow [2024-06-14 11:19:48,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:48,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:48,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:48,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 11:19:48,679 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:48,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:48,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1291642587, now seen corresponding path program 6 times [2024-06-14 11:19:48,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:48,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034336546] [2024-06-14 11:19:48,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:48,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:48,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:48,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:48,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034336546] [2024-06-14 11:19:48,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034336546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:48,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:48,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:48,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755908988] [2024-06-14 11:19:48,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:48,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:48,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:48,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:48,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:48,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:48,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 168 transitions, 1903 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:48,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:48,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:48,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:49,290 INFO L124 PetriNetUnfolderBase]: 2352/4134 cut-off events. [2024-06-14 11:19:49,290 INFO L125 PetriNetUnfolderBase]: For 204158/204169 co-relation queries the response was YES. [2024-06-14 11:19:49,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24485 conditions, 4134 events. 2352/4134 cut-off events. For 204158/204169 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27792 event pairs, 917 based on Foata normal form. 10/4138 useless extension candidates. Maximal degree in co-relation 24393. Up to 3596 conditions per place. [2024-06-14 11:19:49,326 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 109 selfloop transitions, 76 changer transitions 0/191 dead transitions. [2024-06-14 11:19:49,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 191 transitions, 2538 flow [2024-06-14 11:19:49,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:19:49,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:19:49,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-14 11:19:49,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-14 11:19:49,327 INFO L175 Difference]: Start difference. First operand has 179 places, 168 transitions, 1903 flow. Second operand 8 states and 180 transitions. [2024-06-14 11:19:49,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 191 transitions, 2538 flow [2024-06-14 11:19:49,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 191 transitions, 2429 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 11:19:49,702 INFO L231 Difference]: Finished difference. Result has 181 places, 171 transitions, 1986 flow [2024-06-14 11:19:49,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1794, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1986, PETRI_PLACES=181, PETRI_TRANSITIONS=171} [2024-06-14 11:19:49,703 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-14 11:19:49,703 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 171 transitions, 1986 flow [2024-06-14 11:19:49,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:49,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:49,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:49,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 11:19:49,703 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:49,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:49,704 INFO L85 PathProgramCache]: Analyzing trace with hash 551603109, now seen corresponding path program 7 times [2024-06-14 11:19:49,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:49,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904162071] [2024-06-14 11:19:49,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:49,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:49,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:49,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:49,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904162071] [2024-06-14 11:19:49,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904162071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:49,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:49,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:49,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535637198] [2024-06-14 11:19:49,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:49,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:49,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:49,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:49,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:49,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:49,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 171 transitions, 1986 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:49,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:49,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:49,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:50,252 INFO L124 PetriNetUnfolderBase]: 2349/4127 cut-off events. [2024-06-14 11:19:50,253 INFO L125 PetriNetUnfolderBase]: For 210442/210442 co-relation queries the response was YES. [2024-06-14 11:19:50,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24638 conditions, 4127 events. 2349/4127 cut-off events. For 210442/210442 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27764 event pairs, 949 based on Foata normal form. 1/4119 useless extension candidates. Maximal degree in co-relation 24546. Up to 3555 conditions per place. [2024-06-14 11:19:50,290 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 101 selfloop transitions, 83 changer transitions 0/190 dead transitions. [2024-06-14 11:19:50,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 190 transitions, 2654 flow [2024-06-14 11:19:50,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:50,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:50,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-14 11:19:50,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-14 11:19:50,291 INFO L175 Difference]: Start difference. First operand has 181 places, 171 transitions, 1986 flow. Second operand 7 states and 155 transitions. [2024-06-14 11:19:50,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 190 transitions, 2654 flow [2024-06-14 11:19:50,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 190 transitions, 2458 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 11:19:50,725 INFO L231 Difference]: Finished difference. Result has 182 places, 177 transitions, 2088 flow [2024-06-14 11:19:50,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1790, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2088, PETRI_PLACES=182, PETRI_TRANSITIONS=177} [2024-06-14 11:19:50,725 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2024-06-14 11:19:50,725 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 177 transitions, 2088 flow [2024-06-14 11:19:50,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:50,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:50,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:50,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 11:19:50,727 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:50,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:50,727 INFO L85 PathProgramCache]: Analyzing trace with hash 551969095, now seen corresponding path program 2 times [2024-06-14 11:19:50,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:50,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140732] [2024-06-14 11:19:50,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:50,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:50,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:50,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:50,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:50,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140732] [2024-06-14 11:19:50,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:50,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:50,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:50,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156554941] [2024-06-14 11:19:50,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:50,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:50,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:50,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:50,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:50,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:50,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 177 transitions, 2088 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:50,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:50,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:50,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:51,299 INFO L124 PetriNetUnfolderBase]: 2369/4163 cut-off events. [2024-06-14 11:19:51,299 INFO L125 PetriNetUnfolderBase]: For 227827/227827 co-relation queries the response was YES. [2024-06-14 11:19:51,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25802 conditions, 4163 events. 2369/4163 cut-off events. For 227827/227827 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 27967 event pairs, 897 based on Foata normal form. 6/4165 useless extension candidates. Maximal degree in co-relation 25709. Up to 3710 conditions per place. [2024-06-14 11:19:51,335 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 167 selfloop transitions, 26 changer transitions 0/199 dead transitions. [2024-06-14 11:19:51,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 199 transitions, 2595 flow [2024-06-14 11:19:51,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:51,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:51,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-14 11:19:51,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-14 11:19:51,336 INFO L175 Difference]: Start difference. First operand has 182 places, 177 transitions, 2088 flow. Second operand 7 states and 150 transitions. [2024-06-14 11:19:51,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 199 transitions, 2595 flow [2024-06-14 11:19:51,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 199 transitions, 2492 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:51,745 INFO L231 Difference]: Finished difference. Result has 187 places, 180 transitions, 2095 flow [2024-06-14 11:19:51,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1985, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2095, PETRI_PLACES=187, PETRI_TRANSITIONS=180} [2024-06-14 11:19:51,745 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 146 predicate places. [2024-06-14 11:19:51,745 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 180 transitions, 2095 flow [2024-06-14 11:19:51,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:51,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:51,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:51,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 11:19:51,746 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:51,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:51,746 INFO L85 PathProgramCache]: Analyzing trace with hash -2116957477, now seen corresponding path program 3 times [2024-06-14 11:19:51,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:51,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910495377] [2024-06-14 11:19:51,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:51,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:51,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:51,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:51,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910495377] [2024-06-14 11:19:51,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910495377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:51,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:51,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:51,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691637037] [2024-06-14 11:19:51,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:51,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:51,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:51,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:51,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:51,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:51,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 180 transitions, 2095 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:51,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:51,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:51,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:52,409 INFO L124 PetriNetUnfolderBase]: 2356/4144 cut-off events. [2024-06-14 11:19:52,410 INFO L125 PetriNetUnfolderBase]: For 229273/229273 co-relation queries the response was YES. [2024-06-14 11:19:52,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25666 conditions, 4144 events. 2356/4144 cut-off events. For 229273/229273 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27887 event pairs, 876 based on Foata normal form. 6/4146 useless extension candidates. Maximal degree in co-relation 25569. Up to 3559 conditions per place. [2024-06-14 11:19:52,440 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 164 selfloop transitions, 32 changer transitions 0/202 dead transitions. [2024-06-14 11:19:52,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 202 transitions, 2593 flow [2024-06-14 11:19:52,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:52,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:52,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-14 11:19:52,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-14 11:19:52,441 INFO L175 Difference]: Start difference. First operand has 187 places, 180 transitions, 2095 flow. Second operand 7 states and 150 transitions. [2024-06-14 11:19:52,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 202 transitions, 2593 flow [2024-06-14 11:19:52,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 202 transitions, 2537 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:52,825 INFO L231 Difference]: Finished difference. Result has 192 places, 182 transitions, 2139 flow [2024-06-14 11:19:52,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2039, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2139, PETRI_PLACES=192, PETRI_TRANSITIONS=182} [2024-06-14 11:19:52,825 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 151 predicate places. [2024-06-14 11:19:52,825 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 182 transitions, 2139 flow [2024-06-14 11:19:52,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:52,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:52,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:52,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 11:19:52,826 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:52,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:52,826 INFO L85 PathProgramCache]: Analyzing trace with hash -2108713443, now seen corresponding path program 1 times [2024-06-14 11:19:52,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:52,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579699289] [2024-06-14 11:19:52,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:52,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:52,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:52,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:52,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579699289] [2024-06-14 11:19:52,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579699289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:52,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:52,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:52,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006859653] [2024-06-14 11:19:52,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:52,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:52,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:52,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:52,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:52,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:52,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 182 transitions, 2139 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:52,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:52,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:52,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:53,400 INFO L124 PetriNetUnfolderBase]: 2363/4155 cut-off events. [2024-06-14 11:19:53,401 INFO L125 PetriNetUnfolderBase]: For 235092/235092 co-relation queries the response was YES. [2024-06-14 11:19:53,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25837 conditions, 4155 events. 2363/4155 cut-off events. For 235092/235092 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 28029 event pairs, 844 based on Foata normal form. 6/4154 useless extension candidates. Maximal degree in co-relation 25737. Up to 3658 conditions per place. [2024-06-14 11:19:53,440 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 185 selfloop transitions, 15 changer transitions 0/206 dead transitions. [2024-06-14 11:19:53,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 206 transitions, 2752 flow [2024-06-14 11:19:53,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:19:53,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:19:53,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-14 11:19:53,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595 [2024-06-14 11:19:53,441 INFO L175 Difference]: Start difference. First operand has 192 places, 182 transitions, 2139 flow. Second operand 5 states and 119 transitions. [2024-06-14 11:19:53,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 206 transitions, 2752 flow [2024-06-14 11:19:53,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 206 transitions, 2589 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-14 11:19:53,934 INFO L231 Difference]: Finished difference. Result has 190 places, 183 transitions, 2029 flow [2024-06-14 11:19:53,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2029, PETRI_PLACES=190, PETRI_TRANSITIONS=183} [2024-06-14 11:19:53,936 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 149 predicate places. [2024-06-14 11:19:53,936 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 183 transitions, 2029 flow [2024-06-14 11:19:53,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:53,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:53,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:53,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 11:19:53,936 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:53,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:53,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1811551905, now seen corresponding path program 1 times [2024-06-14 11:19:53,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:53,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882621743] [2024-06-14 11:19:53,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:53,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:54,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:54,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882621743] [2024-06-14 11:19:54,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882621743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:54,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:54,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:54,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586521140] [2024-06-14 11:19:54,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:54,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:54,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:54,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:54,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:54,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:54,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 183 transitions, 2029 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:54,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:54,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:54,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:54,521 INFO L124 PetriNetUnfolderBase]: 2350/4136 cut-off events. [2024-06-14 11:19:54,521 INFO L125 PetriNetUnfolderBase]: For 234682/234682 co-relation queries the response was YES. [2024-06-14 11:19:54,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25198 conditions, 4136 events. 2350/4136 cut-off events. For 234682/234682 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27909 event pairs, 837 based on Foata normal form. 6/4135 useless extension candidates. Maximal degree in co-relation 25100. Up to 3652 conditions per place. [2024-06-14 11:19:54,557 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 184 selfloop transitions, 15 changer transitions 0/205 dead transitions. [2024-06-14 11:19:54,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 205 transitions, 2517 flow [2024-06-14 11:19:54,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:19:54,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:19:54,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-14 11:19:54,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-14 11:19:54,559 INFO L175 Difference]: Start difference. First operand has 190 places, 183 transitions, 2029 flow. Second operand 5 states and 118 transitions. [2024-06-14 11:19:54,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 205 transitions, 2517 flow [2024-06-14 11:19:55,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 205 transitions, 2490 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-14 11:19:55,071 INFO L231 Difference]: Finished difference. Result has 193 places, 183 transitions, 2036 flow [2024-06-14 11:19:55,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2002, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2036, PETRI_PLACES=193, PETRI_TRANSITIONS=183} [2024-06-14 11:19:55,072 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-14 11:19:55,072 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 183 transitions, 2036 flow [2024-06-14 11:19:55,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:55,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:55,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:55,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 11:19:55,072 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:55,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:55,073 INFO L85 PathProgramCache]: Analyzing trace with hash -842652273, now seen corresponding path program 1 times [2024-06-14 11:19:55,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:55,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869998934] [2024-06-14 11:19:55,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:55,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:55,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:55,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:55,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:55,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869998934] [2024-06-14 11:19:55,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869998934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:55,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:55,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:55,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161642720] [2024-06-14 11:19:55,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:55,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:55,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:55,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:55,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:55,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:55,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 183 transitions, 2036 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:19:55,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:55,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:55,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:55,743 INFO L124 PetriNetUnfolderBase]: 2355/4147 cut-off events. [2024-06-14 11:19:55,743 INFO L125 PetriNetUnfolderBase]: For 228285/228302 co-relation queries the response was YES. [2024-06-14 11:19:55,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25248 conditions, 4147 events. 2355/4147 cut-off events. For 228285/228302 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27965 event pairs, 907 based on Foata normal form. 13/4151 useless extension candidates. Maximal degree in co-relation 25149. Up to 3605 conditions per place. [2024-06-14 11:19:55,780 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 140 selfloop transitions, 75 changer transitions 0/221 dead transitions. [2024-06-14 11:19:55,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 221 transitions, 2790 flow [2024-06-14 11:19:55,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:19:55,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:19:55,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-14 11:19:55,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5431818181818182 [2024-06-14 11:19:55,782 INFO L175 Difference]: Start difference. First operand has 193 places, 183 transitions, 2036 flow. Second operand 11 states and 239 transitions. [2024-06-14 11:19:55,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 221 transitions, 2790 flow [2024-06-14 11:19:56,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 221 transitions, 2749 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:56,122 INFO L231 Difference]: Finished difference. Result has 200 places, 186 transitions, 2181 flow [2024-06-14 11:19:56,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1995, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2181, PETRI_PLACES=200, PETRI_TRANSITIONS=186} [2024-06-14 11:19:56,122 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 159 predicate places. [2024-06-14 11:19:56,122 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 186 transitions, 2181 flow [2024-06-14 11:19:56,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:19:56,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:56,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:56,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 11:19:56,123 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:56,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:56,123 INFO L85 PathProgramCache]: Analyzing trace with hash 197109937, now seen corresponding path program 2 times [2024-06-14 11:19:56,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:56,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835320740] [2024-06-14 11:19:56,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:56,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:56,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:56,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:56,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:56,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835320740] [2024-06-14 11:19:56,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835320740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:56,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:56,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:56,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887818477] [2024-06-14 11:19:56,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:56,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:56,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:56,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:56,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:56,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:56,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 186 transitions, 2181 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:19:56,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:56,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:56,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:56,788 INFO L124 PetriNetUnfolderBase]: 2352/4143 cut-off events. [2024-06-14 11:19:56,788 INFO L125 PetriNetUnfolderBase]: For 235155/235172 co-relation queries the response was YES. [2024-06-14 11:19:56,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25441 conditions, 4143 events. 2352/4143 cut-off events. For 235155/235172 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27911 event pairs, 907 based on Foata normal form. 13/4147 useless extension candidates. Maximal degree in co-relation 25341. Up to 3602 conditions per place. [2024-06-14 11:19:56,827 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 139 selfloop transitions, 75 changer transitions 0/220 dead transitions. [2024-06-14 11:19:56,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 220 transitions, 2799 flow [2024-06-14 11:19:56,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:19:56,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:19:56,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 238 transitions. [2024-06-14 11:19:56,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5409090909090909 [2024-06-14 11:19:56,828 INFO L175 Difference]: Start difference. First operand has 200 places, 186 transitions, 2181 flow. Second operand 11 states and 238 transitions. [2024-06-14 11:19:56,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 220 transitions, 2799 flow [2024-06-14 11:19:57,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 220 transitions, 2603 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-14 11:19:57,390 INFO L231 Difference]: Finished difference. Result has 202 places, 186 transitions, 2143 flow [2024-06-14 11:19:57,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2143, PETRI_PLACES=202, PETRI_TRANSITIONS=186} [2024-06-14 11:19:57,390 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 161 predicate places. [2024-06-14 11:19:57,390 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 186 transitions, 2143 flow [2024-06-14 11:19:57,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:19:57,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:57,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:57,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 11:19:57,391 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:57,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:57,391 INFO L85 PathProgramCache]: Analyzing trace with hash -336885053, now seen corresponding path program 3 times [2024-06-14 11:19:57,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:57,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695567201] [2024-06-14 11:19:57,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:57,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:57,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:57,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:57,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695567201] [2024-06-14 11:19:57,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695567201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:57,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:57,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:57,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557111952] [2024-06-14 11:19:57,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:57,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:57,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:57,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:57,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:57,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:57,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 186 transitions, 2143 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:19:57,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:57,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:57,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:58,052 INFO L124 PetriNetUnfolderBase]: 2357/4156 cut-off events. [2024-06-14 11:19:58,052 INFO L125 PetriNetUnfolderBase]: For 235163/235174 co-relation queries the response was YES. [2024-06-14 11:19:58,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25462 conditions, 4156 events. 2357/4156 cut-off events. For 235163/235174 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 28064 event pairs, 910 based on Foata normal form. 9/4159 useless extension candidates. Maximal degree in co-relation 25361. Up to 3608 conditions per place. [2024-06-14 11:19:58,090 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 123 selfloop transitions, 82 changer transitions 0/211 dead transitions. [2024-06-14 11:19:58,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 211 transitions, 2746 flow [2024-06-14 11:19:58,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:19:58,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:19:58,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 228 transitions. [2024-06-14 11:19:58,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5181818181818182 [2024-06-14 11:19:58,092 INFO L175 Difference]: Start difference. First operand has 202 places, 186 transitions, 2143 flow. Second operand 11 states and 228 transitions. [2024-06-14 11:19:58,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 211 transitions, 2746 flow [2024-06-14 11:19:58,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 211 transitions, 2586 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 11:19:58,586 INFO L231 Difference]: Finished difference. Result has 203 places, 189 transitions, 2190 flow [2024-06-14 11:19:58,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1991, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2190, PETRI_PLACES=203, PETRI_TRANSITIONS=189} [2024-06-14 11:19:58,586 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 162 predicate places. [2024-06-14 11:19:58,587 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 189 transitions, 2190 flow [2024-06-14 11:19:58,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:19:58,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:58,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:58,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 11:19:58,587 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:58,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:58,587 INFO L85 PathProgramCache]: Analyzing trace with hash -176919699, now seen corresponding path program 4 times [2024-06-14 11:19:58,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:58,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629296471] [2024-06-14 11:19:58,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:58,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:58,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:58,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:58,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629296471] [2024-06-14 11:19:58,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629296471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:58,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:58,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:58,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056481096] [2024-06-14 11:19:58,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:58,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:58,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:58,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:58,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:58,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:58,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 189 transitions, 2190 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:19:58,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:58,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:58,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:59,249 INFO L124 PetriNetUnfolderBase]: 2354/4152 cut-off events. [2024-06-14 11:19:59,249 INFO L125 PetriNetUnfolderBase]: For 233800/233811 co-relation queries the response was YES. [2024-06-14 11:19:59,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25390 conditions, 4152 events. 2354/4152 cut-off events. For 233800/233811 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27997 event pairs, 910 based on Foata normal form. 9/4155 useless extension candidates. Maximal degree in co-relation 25288. Up to 3605 conditions per place. [2024-06-14 11:19:59,286 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 122 selfloop transitions, 82 changer transitions 0/210 dead transitions. [2024-06-14 11:19:59,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 210 transitions, 2648 flow [2024-06-14 11:19:59,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:19:59,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:19:59,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 227 transitions. [2024-06-14 11:19:59,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159090909090909 [2024-06-14 11:19:59,287 INFO L175 Difference]: Start difference. First operand has 203 places, 189 transitions, 2190 flow. Second operand 11 states and 227 transitions. [2024-06-14 11:19:59,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 210 transitions, 2648 flow [2024-06-14 11:19:59,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 210 transitions, 2460 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 11:19:59,683 INFO L231 Difference]: Finished difference. Result has 205 places, 189 transitions, 2172 flow [2024-06-14 11:19:59,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2002, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2172, PETRI_PLACES=205, PETRI_TRANSITIONS=189} [2024-06-14 11:19:59,684 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-14 11:19:59,684 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 189 transitions, 2172 flow [2024-06-14 11:19:59,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:19:59,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:59,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:59,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 11:19:59,685 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:59,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:59,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1140128017, now seen corresponding path program 5 times [2024-06-14 11:19:59,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:59,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262602090] [2024-06-14 11:19:59,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:59,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:59,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:59,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:59,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:59,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262602090] [2024-06-14 11:19:59,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262602090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:59,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:59,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:59,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817066071] [2024-06-14 11:19:59,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:59,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:59,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:59,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:59,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:59,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:19:59,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 189 transitions, 2172 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:19:59,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:59,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:19:59,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:00,305 INFO L124 PetriNetUnfolderBase]: 2351/4146 cut-off events. [2024-06-14 11:20:00,305 INFO L125 PetriNetUnfolderBase]: For 240526/240526 co-relation queries the response was YES. [2024-06-14 11:20:00,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25442 conditions, 4146 events. 2351/4146 cut-off events. For 240526/240526 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 27936 event pairs, 941 based on Foata normal form. 1/4138 useless extension candidates. Maximal degree in co-relation 25339. Up to 3565 conditions per place. [2024-06-14 11:20:00,344 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 107 selfloop transitions, 90 changer transitions 0/203 dead transitions. [2024-06-14 11:20:00,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 203 transitions, 2598 flow [2024-06-14 11:20:00,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:20:00,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:20:00,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-14 11:20:00,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075 [2024-06-14 11:20:00,345 INFO L175 Difference]: Start difference. First operand has 205 places, 189 transitions, 2172 flow. Second operand 10 states and 203 transitions. [2024-06-14 11:20:00,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 203 transitions, 2598 flow [2024-06-14 11:20:00,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 203 transitions, 2434 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-14 11:20:00,737 INFO L231 Difference]: Finished difference. Result has 205 places, 189 transitions, 2194 flow [2024-06-14 11:20:00,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2008, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2194, PETRI_PLACES=205, PETRI_TRANSITIONS=189} [2024-06-14 11:20:00,737 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-14 11:20:00,738 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 189 transitions, 2194 flow [2024-06-14 11:20:00,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:00,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:00,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:00,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 11:20:00,738 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:00,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:00,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1316776580, now seen corresponding path program 1 times [2024-06-14 11:20:00,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:00,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782005673] [2024-06-14 11:20:00,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:00,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:00,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:00,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:00,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:00,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782005673] [2024-06-14 11:20:00,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782005673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:00,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:00,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:00,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555733038] [2024-06-14 11:20:00,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:00,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:00,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:00,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:00,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:00,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:00,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 189 transitions, 2194 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:00,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:00,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:00,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:01,431 INFO L124 PetriNetUnfolderBase]: 2338/4122 cut-off events. [2024-06-14 11:20:01,431 INFO L125 PetriNetUnfolderBase]: For 256251/256268 co-relation queries the response was YES. [2024-06-14 11:20:01,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24609 conditions, 4122 events. 2338/4122 cut-off events. For 256251/256268 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 27621 event pairs, 731 based on Foata normal form. 36/4154 useless extension candidates. Maximal degree in co-relation 24505. Up to 1560 conditions per place. [2024-06-14 11:20:01,471 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 163 selfloop transitions, 57 changer transitions 14/240 dead transitions. [2024-06-14 11:20:01,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 240 transitions, 3092 flow [2024-06-14 11:20:01,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:20:01,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:20:01,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-14 11:20:01,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027777777777777 [2024-06-14 11:20:01,472 INFO L175 Difference]: Start difference. First operand has 205 places, 189 transitions, 2194 flow. Second operand 9 states and 217 transitions. [2024-06-14 11:20:01,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 240 transitions, 3092 flow [2024-06-14 11:20:01,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 240 transitions, 2849 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-14 11:20:01,936 INFO L231 Difference]: Finished difference. Result has 205 places, 185 transitions, 2032 flow [2024-06-14 11:20:01,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1951, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2032, PETRI_PLACES=205, PETRI_TRANSITIONS=185} [2024-06-14 11:20:01,937 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-14 11:20:01,937 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 185 transitions, 2032 flow [2024-06-14 11:20:01,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:01,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:01,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:01,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 11:20:01,939 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:01,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:01,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1830701348, now seen corresponding path program 2 times [2024-06-14 11:20:01,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:01,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037160620] [2024-06-14 11:20:01,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:01,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:02,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:02,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037160620] [2024-06-14 11:20:02,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037160620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:02,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:02,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:02,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950933592] [2024-06-14 11:20:02,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:02,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:02,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:02,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:02,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:02,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:02,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 185 transitions, 2032 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:02,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:02,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:02,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:02,884 INFO L124 PetriNetUnfolderBase]: 2516/4354 cut-off events. [2024-06-14 11:20:02,884 INFO L125 PetriNetUnfolderBase]: For 332702/332719 co-relation queries the response was YES. [2024-06-14 11:20:02,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29143 conditions, 4354 events. 2516/4354 cut-off events. For 332702/332719 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 28995 event pairs, 785 based on Foata normal form. 18/4368 useless extension candidates. Maximal degree in co-relation 29039. Up to 1768 conditions per place. [2024-06-14 11:20:02,931 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 154 selfloop transitions, 62 changer transitions 11/233 dead transitions. [2024-06-14 11:20:02,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 233 transitions, 2928 flow [2024-06-14 11:20:02,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:20:02,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:20:02,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-14 11:20:02,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2024-06-14 11:20:02,933 INFO L175 Difference]: Start difference. First operand has 205 places, 185 transitions, 2032 flow. Second operand 9 states and 212 transitions. [2024-06-14 11:20:02,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 233 transitions, 2928 flow [2024-06-14 11:20:03,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 233 transitions, 2797 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-14 11:20:03,520 INFO L231 Difference]: Finished difference. Result has 205 places, 184 transitions, 2043 flow [2024-06-14 11:20:03,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1913, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2043, PETRI_PLACES=205, PETRI_TRANSITIONS=184} [2024-06-14 11:20:03,521 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-14 11:20:03,521 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 184 transitions, 2043 flow [2024-06-14 11:20:03,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:03,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:03,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:03,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 11:20:03,521 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:03,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:03,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1944055328, now seen corresponding path program 3 times [2024-06-14 11:20:03,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:03,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389276068] [2024-06-14 11:20:03,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:03,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:03,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:03,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:03,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:03,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389276068] [2024-06-14 11:20:03,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389276068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:03,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:03,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:03,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338654855] [2024-06-14 11:20:03,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:03,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:03,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:03,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:03,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:03,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:03,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 184 transitions, 2043 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:03,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:03,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:03,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:04,234 INFO L124 PetriNetUnfolderBase]: 2399/4175 cut-off events. [2024-06-14 11:20:04,235 INFO L125 PetriNetUnfolderBase]: For 312543/312560 co-relation queries the response was YES. [2024-06-14 11:20:04,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26639 conditions, 4175 events. 2399/4175 cut-off events. For 312543/312560 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 27944 event pairs, 870 based on Foata normal form. 42/4213 useless extension candidates. Maximal degree in co-relation 26535. Up to 2889 conditions per place. [2024-06-14 11:20:04,272 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 152 selfloop transitions, 53 changer transitions 18/229 dead transitions. [2024-06-14 11:20:04,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 229 transitions, 2765 flow [2024-06-14 11:20:04,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:20:04,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:20:04,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-14 11:20:04,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5725 [2024-06-14 11:20:04,274 INFO L175 Difference]: Start difference. First operand has 205 places, 184 transitions, 2043 flow. Second operand 10 states and 229 transitions. [2024-06-14 11:20:04,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 229 transitions, 2765 flow [2024-06-14 11:20:04,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 229 transitions, 2634 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 11:20:04,924 INFO L231 Difference]: Finished difference. Result has 203 places, 176 transitions, 1935 flow [2024-06-14 11:20:04,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1916, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1935, PETRI_PLACES=203, PETRI_TRANSITIONS=176} [2024-06-14 11:20:04,925 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 162 predicate places. [2024-06-14 11:20:04,925 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 176 transitions, 1935 flow [2024-06-14 11:20:04,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:04,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:04,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:04,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 11:20:04,925 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:04,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:04,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1944294338, now seen corresponding path program 4 times [2024-06-14 11:20:04,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:04,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351940117] [2024-06-14 11:20:04,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:04,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:05,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:05,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351940117] [2024-06-14 11:20:05,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351940117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:05,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:05,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:05,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239002767] [2024-06-14 11:20:05,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:05,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:05,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:05,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:05,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:05,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:05,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 176 transitions, 1935 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:05,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:05,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:05,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:05,549 INFO L124 PetriNetUnfolderBase]: 2157/3756 cut-off events. [2024-06-14 11:20:05,549 INFO L125 PetriNetUnfolderBase]: For 268247/268264 co-relation queries the response was YES. [2024-06-14 11:20:05,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23451 conditions, 3756 events. 2157/3756 cut-off events. For 268247/268264 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 24625 event pairs, 804 based on Foata normal form. 46/3798 useless extension candidates. Maximal degree in co-relation 23349. Up to 3145 conditions per place. [2024-06-14 11:20:05,583 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 136 selfloop transitions, 47 changer transitions 23/212 dead transitions. [2024-06-14 11:20:05,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 212 transitions, 2477 flow [2024-06-14 11:20:05,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:20:05,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:20:05,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-14 11:20:05,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.545 [2024-06-14 11:20:05,585 INFO L175 Difference]: Start difference. First operand has 203 places, 176 transitions, 1935 flow. Second operand 10 states and 218 transitions. [2024-06-14 11:20:05,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 212 transitions, 2477 flow [2024-06-14 11:20:06,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 212 transitions, 2364 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-14 11:20:06,064 INFO L231 Difference]: Finished difference. Result has 200 places, 169 transitions, 1854 flow [2024-06-14 11:20:06,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1826, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1854, PETRI_PLACES=200, PETRI_TRANSITIONS=169} [2024-06-14 11:20:06,065 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 159 predicate places. [2024-06-14 11:20:06,065 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 169 transitions, 1854 flow [2024-06-14 11:20:06,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:06,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:06,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:06,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 11:20:06,065 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:06,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:06,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1146231264, now seen corresponding path program 5 times [2024-06-14 11:20:06,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:06,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774529600] [2024-06-14 11:20:06,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:06,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:06,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:06,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:06,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774529600] [2024-06-14 11:20:06,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774529600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:06,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:06,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:06,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587683290] [2024-06-14 11:20:06,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:06,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:06,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:06,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:06,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:06,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:06,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 169 transitions, 1854 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:06,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:06,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:06,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:06,634 INFO L124 PetriNetUnfolderBase]: 2061/3585 cut-off events. [2024-06-14 11:20:06,634 INFO L125 PetriNetUnfolderBase]: For 213473/213489 co-relation queries the response was YES. [2024-06-14 11:20:06,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22426 conditions, 3585 events. 2061/3585 cut-off events. For 213473/213489 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 23287 event pairs, 768 based on Foata normal form. 19/3600 useless extension candidates. Maximal degree in co-relation 22326. Up to 3141 conditions per place. [2024-06-14 11:20:06,666 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 135 selfloop transitions, 45 changer transitions 10/196 dead transitions. [2024-06-14 11:20:06,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 196 transitions, 2330 flow [2024-06-14 11:20:06,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:20:06,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:20:06,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-14 11:20:06,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5361111111111111 [2024-06-14 11:20:06,668 INFO L175 Difference]: Start difference. First operand has 200 places, 169 transitions, 1854 flow. Second operand 9 states and 193 transitions. [2024-06-14 11:20:06,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 196 transitions, 2330 flow [2024-06-14 11:20:07,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 196 transitions, 2224 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-14 11:20:07,110 INFO L231 Difference]: Finished difference. Result has 193 places, 166 transitions, 1811 flow [2024-06-14 11:20:07,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1750, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1811, PETRI_PLACES=193, PETRI_TRANSITIONS=166} [2024-06-14 11:20:07,110 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-14 11:20:07,110 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 166 transitions, 1811 flow [2024-06-14 11:20:07,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:07,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:07,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:07,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 11:20:07,111 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:07,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:07,111 INFO L85 PathProgramCache]: Analyzing trace with hash 26777568, now seen corresponding path program 6 times [2024-06-14 11:20:07,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:07,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271691350] [2024-06-14 11:20:07,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:07,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:07,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:07,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:07,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:07,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271691350] [2024-06-14 11:20:07,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271691350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:07,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:07,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:07,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668631362] [2024-06-14 11:20:07,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:07,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:07,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:07,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:07,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:07,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:07,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 166 transitions, 1811 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:07,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:07,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:07,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:07,703 INFO L124 PetriNetUnfolderBase]: 2229/3852 cut-off events. [2024-06-14 11:20:07,704 INFO L125 PetriNetUnfolderBase]: For 233378/233394 co-relation queries the response was YES. [2024-06-14 11:20:07,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24744 conditions, 3852 events. 2229/3852 cut-off events. For 233378/233394 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 25316 event pairs, 840 based on Foata normal form. 19/3867 useless extension candidates. Maximal degree in co-relation 24647. Up to 3107 conditions per place. [2024-06-14 11:20:07,737 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 139 selfloop transitions, 42 changer transitions 14/201 dead transitions. [2024-06-14 11:20:07,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 201 transitions, 2453 flow [2024-06-14 11:20:07,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:20:07,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:20:07,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-14 11:20:07,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527777777777778 [2024-06-14 11:20:07,738 INFO L175 Difference]: Start difference. First operand has 193 places, 166 transitions, 1811 flow. Second operand 9 states and 199 transitions. [2024-06-14 11:20:07,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 201 transitions, 2453 flow [2024-06-14 11:20:08,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 201 transitions, 2353 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 11:20:08,252 INFO L231 Difference]: Finished difference. Result has 192 places, 162 transitions, 1752 flow [2024-06-14 11:20:08,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1715, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1752, PETRI_PLACES=192, PETRI_TRANSITIONS=162} [2024-06-14 11:20:08,253 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 151 predicate places. [2024-06-14 11:20:08,253 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 162 transitions, 1752 flow [2024-06-14 11:20:08,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:08,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:08,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:08,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 11:20:08,254 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:08,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:08,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1655785022, now seen corresponding path program 7 times [2024-06-14 11:20:08,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:08,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272331404] [2024-06-14 11:20:08,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:08,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:08,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:08,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:08,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:08,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272331404] [2024-06-14 11:20:08,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272331404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:08,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:08,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:08,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110008394] [2024-06-14 11:20:08,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:08,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:08,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:08,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:08,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:08,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:08,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 162 transitions, 1752 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:08,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:08,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:08,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:08,865 INFO L124 PetriNetUnfolderBase]: 2102/3648 cut-off events. [2024-06-14 11:20:08,866 INFO L125 PetriNetUnfolderBase]: For 215194/215200 co-relation queries the response was YES. [2024-06-14 11:20:08,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22267 conditions, 3648 events. 2102/3648 cut-off events. For 215194/215200 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23939 event pairs, 686 based on Foata normal form. 34/3678 useless extension candidates. Maximal degree in co-relation 22170. Up to 2035 conditions per place. [2024-06-14 11:20:08,896 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 133 selfloop transitions, 32 changer transitions 21/192 dead transitions. [2024-06-14 11:20:08,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 192 transitions, 2348 flow [2024-06-14 11:20:08,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:20:08,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:20:08,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 11:20:08,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-14 11:20:08,897 INFO L175 Difference]: Start difference. First operand has 192 places, 162 transitions, 1752 flow. Second operand 7 states and 166 transitions. [2024-06-14 11:20:08,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 192 transitions, 2348 flow [2024-06-14 11:20:09,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 192 transitions, 2242 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-14 11:20:09,240 INFO L231 Difference]: Finished difference. Result has 187 places, 151 transitions, 1591 flow [2024-06-14 11:20:09,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1650, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1591, PETRI_PLACES=187, PETRI_TRANSITIONS=151} [2024-06-14 11:20:09,240 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 146 predicate places. [2024-06-14 11:20:09,240 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 151 transitions, 1591 flow [2024-06-14 11:20:09,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:09,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:09,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:09,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 11:20:09,241 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:09,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:09,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1478290244, now seen corresponding path program 1 times [2024-06-14 11:20:09,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:09,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300369411] [2024-06-14 11:20:09,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:09,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:09,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:09,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300369411] [2024-06-14 11:20:09,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300369411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:09,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:09,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:20:09,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823933138] [2024-06-14 11:20:09,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:09,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:20:09,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:09,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:20:09,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:20:09,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:09,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 151 transitions, 1591 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:09,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:09,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:09,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:09,730 INFO L124 PetriNetUnfolderBase]: 1868/3255 cut-off events. [2024-06-14 11:20:09,730 INFO L125 PetriNetUnfolderBase]: For 185800/185806 co-relation queries the response was YES. [2024-06-14 11:20:09,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20781 conditions, 3255 events. 1868/3255 cut-off events. For 185800/185806 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 21089 event pairs, 620 based on Foata normal form. 10/3261 useless extension candidates. Maximal degree in co-relation 20685. Up to 2685 conditions per place. [2024-06-14 11:20:09,757 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 134 selfloop transitions, 34 changer transitions 0/174 dead transitions. [2024-06-14 11:20:09,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 174 transitions, 2135 flow [2024-06-14 11:20:09,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:20:09,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:20:09,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-14 11:20:09,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 11:20:09,759 INFO L175 Difference]: Start difference. First operand has 187 places, 151 transitions, 1591 flow. Second operand 6 states and 140 transitions. [2024-06-14 11:20:09,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 174 transitions, 2135 flow [2024-06-14 11:20:10,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 174 transitions, 2040 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-14 11:20:10,050 INFO L231 Difference]: Finished difference. Result has 177 places, 153 transitions, 1616 flow [2024-06-14 11:20:10,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1504, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1616, PETRI_PLACES=177, PETRI_TRANSITIONS=153} [2024-06-14 11:20:10,050 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-14 11:20:10,050 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 153 transitions, 1616 flow [2024-06-14 11:20:10,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:10,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:10,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:10,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 11:20:10,051 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:10,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:10,051 INFO L85 PathProgramCache]: Analyzing trace with hash 342834050, now seen corresponding path program 8 times [2024-06-14 11:20:10,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:10,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280695592] [2024-06-14 11:20:10,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:10,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:10,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:10,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:10,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:10,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280695592] [2024-06-14 11:20:10,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280695592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:10,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:10,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:10,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192066728] [2024-06-14 11:20:10,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:10,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:10,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:10,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:10,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:10,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:10,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 153 transitions, 1616 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:10,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:10,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:10,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:10,577 INFO L124 PetriNetUnfolderBase]: 1799/3140 cut-off events. [2024-06-14 11:20:10,578 INFO L125 PetriNetUnfolderBase]: For 158375/158381 co-relation queries the response was YES. [2024-06-14 11:20:10,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18469 conditions, 3140 events. 1799/3140 cut-off events. For 158375/158381 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20161 event pairs, 683 based on Foata normal form. 38/3174 useless extension candidates. Maximal degree in co-relation 18378. Up to 2613 conditions per place. [2024-06-14 11:20:10,603 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 120 selfloop transitions, 26 changer transitions 21/173 dead transitions. [2024-06-14 11:20:10,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 173 transitions, 2026 flow [2024-06-14 11:20:10,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:20:10,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:20:10,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-14 11:20:10,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-14 11:20:10,604 INFO L175 Difference]: Start difference. First operand has 177 places, 153 transitions, 1616 flow. Second operand 7 states and 156 transitions. [2024-06-14 11:20:10,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 173 transitions, 2026 flow [2024-06-14 11:20:10,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 173 transitions, 1976 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-14 11:20:10,830 INFO L231 Difference]: Finished difference. Result has 181 places, 143 transitions, 1515 flow [2024-06-14 11:20:10,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1566, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1515, PETRI_PLACES=181, PETRI_TRANSITIONS=143} [2024-06-14 11:20:10,831 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-14 11:20:10,831 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 143 transitions, 1515 flow [2024-06-14 11:20:10,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:10,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:10,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:10,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 11:20:10,831 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:10,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:10,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1360326812, now seen corresponding path program 9 times [2024-06-14 11:20:10,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:10,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552275806] [2024-06-14 11:20:10,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:10,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:10,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:10,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:10,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:10,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552275806] [2024-06-14 11:20:10,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552275806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:10,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:10,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:10,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319994717] [2024-06-14 11:20:10,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:10,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:10,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:10,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:10,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:10,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:10,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 143 transitions, 1515 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:10,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:10,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:10,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:11,302 INFO L124 PetriNetUnfolderBase]: 1578/2747 cut-off events. [2024-06-14 11:20:11,303 INFO L125 PetriNetUnfolderBase]: For 123253/123259 co-relation queries the response was YES. [2024-06-14 11:20:11,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15328 conditions, 2747 events. 1578/2747 cut-off events. For 123253/123259 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 17029 event pairs, 558 based on Foata normal form. 38/2781 useless extension candidates. Maximal degree in co-relation 15236. Up to 2250 conditions per place. [2024-06-14 11:20:11,324 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 122 selfloop transitions, 25 changer transitions 7/160 dead transitions. [2024-06-14 11:20:11,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 160 transitions, 1891 flow [2024-06-14 11:20:11,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:20:11,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:20:11,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-14 11:20:11,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-14 11:20:11,325 INFO L175 Difference]: Start difference. First operand has 181 places, 143 transitions, 1515 flow. Second operand 7 states and 150 transitions. [2024-06-14 11:20:11,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 160 transitions, 1891 flow [2024-06-14 11:20:11,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 160 transitions, 1823 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-14 11:20:11,460 INFO L231 Difference]: Finished difference. Result has 171 places, 138 transitions, 1443 flow [2024-06-14 11:20:11,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1447, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1443, PETRI_PLACES=171, PETRI_TRANSITIONS=138} [2024-06-14 11:20:11,461 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 130 predicate places. [2024-06-14 11:20:11,461 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 138 transitions, 1443 flow [2024-06-14 11:20:11,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:11,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:11,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:11,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 11:20:11,462 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:11,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:11,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1359957850, now seen corresponding path program 1 times [2024-06-14 11:20:11,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:11,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856279263] [2024-06-14 11:20:11,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:11,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:11,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:11,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:11,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:11,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856279263] [2024-06-14 11:20:11,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856279263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:11,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:11,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:11,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294163619] [2024-06-14 11:20:11,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:11,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:11,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:11,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:11,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:11,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:11,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 138 transitions, 1443 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:11,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:11,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:11,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:11,924 INFO L124 PetriNetUnfolderBase]: 1498/2627 cut-off events. [2024-06-14 11:20:11,925 INFO L125 PetriNetUnfolderBase]: For 100285/100291 co-relation queries the response was YES. [2024-06-14 11:20:11,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14545 conditions, 2627 events. 1498/2627 cut-off events. For 100285/100291 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 16204 event pairs, 383 based on Foata normal form. 34/2657 useless extension candidates. Maximal degree in co-relation 14458. Up to 2022 conditions per place. [2024-06-14 11:20:11,944 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 124 selfloop transitions, 32 changer transitions 5/167 dead transitions. [2024-06-14 11:20:11,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 167 transitions, 1950 flow [2024-06-14 11:20:11,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:11,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:11,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-14 11:20:11,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540625 [2024-06-14 11:20:11,946 INFO L175 Difference]: Start difference. First operand has 171 places, 138 transitions, 1443 flow. Second operand 8 states and 173 transitions. [2024-06-14 11:20:11,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 167 transitions, 1950 flow [2024-06-14 11:20:12,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 167 transitions, 1870 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-14 11:20:12,082 INFO L231 Difference]: Finished difference. Result has 167 places, 141 transitions, 1505 flow [2024-06-14 11:20:12,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1505, PETRI_PLACES=167, PETRI_TRANSITIONS=141} [2024-06-14 11:20:12,083 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 126 predicate places. [2024-06-14 11:20:12,083 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 141 transitions, 1505 flow [2024-06-14 11:20:12,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:12,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:12,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:12,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 11:20:12,084 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:12,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:12,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1359957664, now seen corresponding path program 1 times [2024-06-14 11:20:12,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:12,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404528162] [2024-06-14 11:20:12,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:12,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:12,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:12,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:12,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:12,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404528162] [2024-06-14 11:20:12,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404528162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:12,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:12,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:20:12,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955089079] [2024-06-14 11:20:12,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:12,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:20:12,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:12,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:20:12,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:20:12,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:12,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 141 transitions, 1505 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:12,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:12,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:12,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:12,481 INFO L124 PetriNetUnfolderBase]: 1384/2423 cut-off events. [2024-06-14 11:20:12,481 INFO L125 PetriNetUnfolderBase]: For 72555/72558 co-relation queries the response was YES. [2024-06-14 11:20:12,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13495 conditions, 2423 events. 1384/2423 cut-off events. For 72555/72558 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 14584 event pairs, 363 based on Foata normal form. 8/2427 useless extension candidates. Maximal degree in co-relation 13410. Up to 1930 conditions per place. [2024-06-14 11:20:12,499 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 121 selfloop transitions, 34 changer transitions 0/161 dead transitions. [2024-06-14 11:20:12,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 161 transitions, 1891 flow [2024-06-14 11:20:12,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:20:12,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:20:12,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-14 11:20:12,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-14 11:20:12,500 INFO L175 Difference]: Start difference. First operand has 167 places, 141 transitions, 1505 flow. Second operand 6 states and 138 transitions. [2024-06-14 11:20:12,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 161 transitions, 1891 flow [2024-06-14 11:20:12,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 161 transitions, 1806 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 11:20:12,608 INFO L231 Difference]: Finished difference. Result has 166 places, 141 transitions, 1496 flow [2024-06-14 11:20:12,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1420, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1496, PETRI_PLACES=166, PETRI_TRANSITIONS=141} [2024-06-14 11:20:12,609 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-14 11:20:12,609 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 141 transitions, 1496 flow [2024-06-14 11:20:12,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:12,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:12,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:12,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 11:20:12,609 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:12,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:12,610 INFO L85 PathProgramCache]: Analyzing trace with hash -317784606, now seen corresponding path program 2 times [2024-06-14 11:20:12,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:12,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074939763] [2024-06-14 11:20:12,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:12,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:12,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:12,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:12,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:12,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074939763] [2024-06-14 11:20:12,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074939763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:12,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:12,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:12,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265610460] [2024-06-14 11:20:12,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:12,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:12,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:12,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:12,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:12,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:12,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 141 transitions, 1496 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:12,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:12,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:12,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:13,020 INFO L124 PetriNetUnfolderBase]: 1344/2321 cut-off events. [2024-06-14 11:20:13,020 INFO L125 PetriNetUnfolderBase]: For 67255/67258 co-relation queries the response was YES. [2024-06-14 11:20:13,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12724 conditions, 2321 events. 1344/2321 cut-off events. For 67255/67258 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 13564 event pairs, 423 based on Foata normal form. 10/2327 useless extension candidates. Maximal degree in co-relation 12640. Up to 1938 conditions per place. [2024-06-14 11:20:13,038 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 125 selfloop transitions, 22 changer transitions 9/162 dead transitions. [2024-06-14 11:20:13,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 162 transitions, 1972 flow [2024-06-14 11:20:13,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:13,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:13,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-14 11:20:13,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521875 [2024-06-14 11:20:13,039 INFO L175 Difference]: Start difference. First operand has 166 places, 141 transitions, 1496 flow. Second operand 8 states and 167 transitions. [2024-06-14 11:20:13,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 162 transitions, 1972 flow [2024-06-14 11:20:13,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 162 transitions, 1872 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 11:20:13,140 INFO L231 Difference]: Finished difference. Result has 168 places, 137 transitions, 1394 flow [2024-06-14 11:20:13,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1398, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1394, PETRI_PLACES=168, PETRI_TRANSITIONS=137} [2024-06-14 11:20:13,141 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 127 predicate places. [2024-06-14 11:20:13,141 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 137 transitions, 1394 flow [2024-06-14 11:20:13,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:13,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:13,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:13,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 11:20:13,142 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:13,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:13,142 INFO L85 PathProgramCache]: Analyzing trace with hash -214580646, now seen corresponding path program 3 times [2024-06-14 11:20:13,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:13,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043605016] [2024-06-14 11:20:13,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:13,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:13,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:13,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:13,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:13,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043605016] [2024-06-14 11:20:13,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043605016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:13,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:13,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:13,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779432581] [2024-06-14 11:20:13,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:13,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:13,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:13,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:13,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:13,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:13,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 137 transitions, 1394 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:13,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:13,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:13,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:13,507 INFO L124 PetriNetUnfolderBase]: 1176/2027 cut-off events. [2024-06-14 11:20:13,507 INFO L125 PetriNetUnfolderBase]: For 59283/59286 co-relation queries the response was YES. [2024-06-14 11:20:13,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11022 conditions, 2027 events. 1176/2027 cut-off events. For 59283/59286 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 11520 event pairs, 349 based on Foata normal form. 10/2033 useless extension candidates. Maximal degree in co-relation 10938. Up to 1752 conditions per place. [2024-06-14 11:20:13,522 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 117 selfloop transitions, 18 changer transitions 12/153 dead transitions. [2024-06-14 11:20:13,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 153 transitions, 1744 flow [2024-06-14 11:20:13,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:13,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:13,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-14 11:20:13,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 11:20:13,523 INFO L175 Difference]: Start difference. First operand has 168 places, 137 transitions, 1394 flow. Second operand 8 states and 160 transitions. [2024-06-14 11:20:13,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 153 transitions, 1744 flow [2024-06-14 11:20:13,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 153 transitions, 1680 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-14 11:20:13,603 INFO L231 Difference]: Finished difference. Result has 160 places, 132 transitions, 1317 flow [2024-06-14 11:20:13,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1317, PETRI_PLACES=160, PETRI_TRANSITIONS=132} [2024-06-14 11:20:13,604 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 119 predicate places. [2024-06-14 11:20:13,604 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 132 transitions, 1317 flow [2024-06-14 11:20:13,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:13,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:13,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:13,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 11:20:13,606 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:13,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:13,606 INFO L85 PathProgramCache]: Analyzing trace with hash 26421414, now seen corresponding path program 4 times [2024-06-14 11:20:13,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:13,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098902750] [2024-06-14 11:20:13,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:13,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:13,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:13,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:13,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:13,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098902750] [2024-06-14 11:20:13,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098902750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:13,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:13,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:13,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143743872] [2024-06-14 11:20:13,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:13,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:13,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:13,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:13,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:13,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:13,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 132 transitions, 1317 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:13,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:13,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:13,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:14,213 INFO L124 PetriNetUnfolderBase]: 1094/1883 cut-off events. [2024-06-14 11:20:14,213 INFO L125 PetriNetUnfolderBase]: For 52307/52310 co-relation queries the response was YES. [2024-06-14 11:20:14,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10354 conditions, 1883 events. 1094/1883 cut-off events. For 52307/52310 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 10460 event pairs, 245 based on Foata normal form. 8/1887 useless extension candidates. Maximal degree in co-relation 10274. Up to 1556 conditions per place. [2024-06-14 11:20:14,227 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 117 selfloop transitions, 30 changer transitions 0/153 dead transitions. [2024-06-14 11:20:14,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 153 transitions, 1711 flow [2024-06-14 11:20:14,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:14,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:14,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-14 11:20:14,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521875 [2024-06-14 11:20:14,228 INFO L175 Difference]: Start difference. First operand has 160 places, 132 transitions, 1317 flow. Second operand 8 states and 167 transitions. [2024-06-14 11:20:14,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 153 transitions, 1711 flow [2024-06-14 11:20:14,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 153 transitions, 1630 flow, removed 17 selfloop flow, removed 11 redundant places. [2024-06-14 11:20:14,284 INFO L231 Difference]: Finished difference. Result has 149 places, 133 transitions, 1334 flow [2024-06-14 11:20:14,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1248, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1334, PETRI_PLACES=149, PETRI_TRANSITIONS=133} [2024-06-14 11:20:14,284 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 108 predicate places. [2024-06-14 11:20:14,284 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 133 transitions, 1334 flow [2024-06-14 11:20:14,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:14,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:14,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:14,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 11:20:14,285 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:14,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:14,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1239035288, now seen corresponding path program 5 times [2024-06-14 11:20:14,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:14,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6139330] [2024-06-14 11:20:14,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:14,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:14,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:14,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:14,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:14,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6139330] [2024-06-14 11:20:14,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6139330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:14,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:14,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:14,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301363039] [2024-06-14 11:20:14,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:14,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:14,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:14,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:14,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:14,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:14,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 133 transitions, 1334 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:14,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:14,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:14,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:14,626 INFO L124 PetriNetUnfolderBase]: 1114/1915 cut-off events. [2024-06-14 11:20:14,627 INFO L125 PetriNetUnfolderBase]: For 42675/42678 co-relation queries the response was YES. [2024-06-14 11:20:14,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10049 conditions, 1915 events. 1114/1915 cut-off events. For 42675/42678 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 10682 event pairs, 248 based on Foata normal form. 8/1919 useless extension candidates. Maximal degree in co-relation 9975. Up to 1508 conditions per place. [2024-06-14 11:20:14,639 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 118 selfloop transitions, 32 changer transitions 0/156 dead transitions. [2024-06-14 11:20:14,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 156 transitions, 1736 flow [2024-06-14 11:20:14,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:14,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:14,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-14 11:20:14,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-14 11:20:14,640 INFO L175 Difference]: Start difference. First operand has 149 places, 133 transitions, 1334 flow. Second operand 8 states and 168 transitions. [2024-06-14 11:20:14,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 156 transitions, 1736 flow [2024-06-14 11:20:14,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 156 transitions, 1628 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 11:20:14,698 INFO L231 Difference]: Finished difference. Result has 150 places, 134 transitions, 1318 flow [2024-06-14 11:20:14,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1226, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1318, PETRI_PLACES=150, PETRI_TRANSITIONS=134} [2024-06-14 11:20:14,698 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2024-06-14 11:20:14,699 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 134 transitions, 1318 flow [2024-06-14 11:20:14,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:14,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:14,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:14,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 11:20:14,699 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:14,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:14,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1174173086, now seen corresponding path program 2 times [2024-06-14 11:20:14,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:14,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696516907] [2024-06-14 11:20:14,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:14,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:14,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:14,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:14,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696516907] [2024-06-14 11:20:14,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696516907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:14,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:14,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:14,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481402131] [2024-06-14 11:20:14,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:14,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:14,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:14,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:14,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:14,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:14,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 134 transitions, 1318 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:14,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:14,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:14,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:15,066 INFO L124 PetriNetUnfolderBase]: 1134/1949 cut-off events. [2024-06-14 11:20:15,067 INFO L125 PetriNetUnfolderBase]: For 44751/44754 co-relation queries the response was YES. [2024-06-14 11:20:15,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10193 conditions, 1949 events. 1134/1949 cut-off events. For 44751/44754 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 10924 event pairs, 338 based on Foata normal form. 8/1943 useless extension candidates. Maximal degree in co-relation 10119. Up to 1598 conditions per place. [2024-06-14 11:20:15,080 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 124 selfloop transitions, 31 changer transitions 0/161 dead transitions. [2024-06-14 11:20:15,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 161 transitions, 1800 flow [2024-06-14 11:20:15,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:15,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:15,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-14 11:20:15,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546875 [2024-06-14 11:20:15,082 INFO L175 Difference]: Start difference. First operand has 150 places, 134 transitions, 1318 flow. Second operand 8 states and 175 transitions. [2024-06-14 11:20:15,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 161 transitions, 1800 flow [2024-06-14 11:20:15,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 161 transitions, 1720 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 11:20:15,140 INFO L231 Difference]: Finished difference. Result has 152 places, 135 transitions, 1326 flow [2024-06-14 11:20:15,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1326, PETRI_PLACES=152, PETRI_TRANSITIONS=135} [2024-06-14 11:20:15,140 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 111 predicate places. [2024-06-14 11:20:15,141 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 135 transitions, 1326 flow [2024-06-14 11:20:15,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:15,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:15,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:15,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 11:20:15,141 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:15,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:15,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1174233536, now seen corresponding path program 3 times [2024-06-14 11:20:15,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:15,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072317519] [2024-06-14 11:20:15,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:15,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:15,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:15,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072317519] [2024-06-14 11:20:15,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072317519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:15,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:15,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:15,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677414333] [2024-06-14 11:20:15,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:15,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:15,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:15,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:15,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:15,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:15,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 135 transitions, 1326 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:15,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:15,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:15,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:15,498 INFO L124 PetriNetUnfolderBase]: 1116/1928 cut-off events. [2024-06-14 11:20:15,498 INFO L125 PetriNetUnfolderBase]: For 42800/42803 co-relation queries the response was YES. [2024-06-14 11:20:15,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9757 conditions, 1928 events. 1116/1928 cut-off events. For 42800/42803 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 10836 event pairs, 341 based on Foata normal form. 10/1929 useless extension candidates. Maximal degree in co-relation 9682. Up to 1632 conditions per place. [2024-06-14 11:20:15,512 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 119 selfloop transitions, 28 changer transitions 0/153 dead transitions. [2024-06-14 11:20:15,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 153 transitions, 1678 flow [2024-06-14 11:20:15,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:20:15,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:20:15,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-14 11:20:15,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-14 11:20:15,514 INFO L175 Difference]: Start difference. First operand has 152 places, 135 transitions, 1326 flow. Second operand 7 states and 152 transitions. [2024-06-14 11:20:15,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 153 transitions, 1678 flow [2024-06-14 11:20:15,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 153 transitions, 1598 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 11:20:15,573 INFO L231 Difference]: Finished difference. Result has 154 places, 135 transitions, 1307 flow [2024-06-14 11:20:15,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1246, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1307, PETRI_PLACES=154, PETRI_TRANSITIONS=135} [2024-06-14 11:20:15,573 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-14 11:20:15,573 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 135 transitions, 1307 flow [2024-06-14 11:20:15,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:15,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:15,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:15,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 11:20:15,574 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:15,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:15,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1459272956, now seen corresponding path program 4 times [2024-06-14 11:20:15,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:15,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762594789] [2024-06-14 11:20:15,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:15,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:15,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:15,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:15,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:15,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762594789] [2024-06-14 11:20:15,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762594789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:15,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:15,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:15,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525907451] [2024-06-14 11:20:15,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:15,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:15,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:15,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:15,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:15,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:15,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 135 transitions, 1307 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:15,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:15,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:15,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:15,968 INFO L124 PetriNetUnfolderBase]: 1136/1959 cut-off events. [2024-06-14 11:20:15,968 INFO L125 PetriNetUnfolderBase]: For 43016/43019 co-relation queries the response was YES. [2024-06-14 11:20:15,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9834 conditions, 1959 events. 1136/1959 cut-off events. For 43016/43019 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 11003 event pairs, 246 based on Foata normal form. 8/1957 useless extension candidates. Maximal degree in co-relation 9758. Up to 1545 conditions per place. [2024-06-14 11:20:15,981 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 120 selfloop transitions, 36 changer transitions 0/162 dead transitions. [2024-06-14 11:20:15,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 162 transitions, 1797 flow [2024-06-14 11:20:15,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:20:15,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:20:15,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-14 11:20:15,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5678571428571428 [2024-06-14 11:20:15,982 INFO L175 Difference]: Start difference. First operand has 154 places, 135 transitions, 1307 flow. Second operand 7 states and 159 transitions. [2024-06-14 11:20:15,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 162 transitions, 1797 flow [2024-06-14 11:20:16,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 162 transitions, 1714 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 11:20:16,042 INFO L231 Difference]: Finished difference. Result has 154 places, 136 transitions, 1324 flow [2024-06-14 11:20:16,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1324, PETRI_PLACES=154, PETRI_TRANSITIONS=136} [2024-06-14 11:20:16,043 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-14 11:20:16,043 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 136 transitions, 1324 flow [2024-06-14 11:20:16,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:16,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:16,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:16,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 11:20:16,044 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:16,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:16,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1470700796, now seen corresponding path program 5 times [2024-06-14 11:20:16,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:16,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267893119] [2024-06-14 11:20:16,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:16,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:16,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:16,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:16,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267893119] [2024-06-14 11:20:16,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267893119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:16,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:16,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:20:16,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38442339] [2024-06-14 11:20:16,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:16,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:20:16,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:16,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:20:16,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:20:16,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:16,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 136 transitions, 1324 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:16,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:16,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:16,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:16,366 INFO L124 PetriNetUnfolderBase]: 1143/1976 cut-off events. [2024-06-14 11:20:16,366 INFO L125 PetriNetUnfolderBase]: For 44252/44252 co-relation queries the response was YES. [2024-06-14 11:20:16,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9977 conditions, 1976 events. 1143/1976 cut-off events. For 44252/44252 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 11161 event pairs, 210 based on Foata normal form. 6/1971 useless extension candidates. Maximal degree in co-relation 9900. Up to 1125 conditions per place. [2024-06-14 11:20:16,380 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 108 selfloop transitions, 44 changer transitions 0/158 dead transitions. [2024-06-14 11:20:16,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 158 transitions, 1804 flow [2024-06-14 11:20:16,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:20:16,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:20:16,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-14 11:20:16,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-14 11:20:16,381 INFO L175 Difference]: Start difference. First operand has 154 places, 136 transitions, 1324 flow. Second operand 6 states and 136 transitions. [2024-06-14 11:20:16,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 158 transitions, 1804 flow [2024-06-14 11:20:16,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 158 transitions, 1716 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 11:20:16,446 INFO L231 Difference]: Finished difference. Result has 155 places, 137 transitions, 1352 flow [2024-06-14 11:20:16,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1352, PETRI_PLACES=155, PETRI_TRANSITIONS=137} [2024-06-14 11:20:16,447 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 114 predicate places. [2024-06-14 11:20:16,447 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 137 transitions, 1352 flow [2024-06-14 11:20:16,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:16,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:16,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:16,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 11:20:16,448 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:16,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:16,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1856888870, now seen corresponding path program 6 times [2024-06-14 11:20:16,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:16,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915545299] [2024-06-14 11:20:16,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:16,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:16,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:16,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:16,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:16,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915545299] [2024-06-14 11:20:16,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915545299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:16,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:16,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:16,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004102920] [2024-06-14 11:20:16,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:16,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:16,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:16,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:16,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:16,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:16,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 137 transitions, 1352 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:16,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:16,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:16,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:16,798 INFO L124 PetriNetUnfolderBase]: 1125/1955 cut-off events. [2024-06-14 11:20:16,798 INFO L125 PetriNetUnfolderBase]: For 41683/41683 co-relation queries the response was YES. [2024-06-14 11:20:16,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9647 conditions, 1955 events. 1125/1955 cut-off events. For 41683/41683 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 11108 event pairs, 356 based on Foata normal form. 8/1957 useless extension candidates. Maximal degree in co-relation 9569. Up to 1651 conditions per place. [2024-06-14 11:20:16,812 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 112 selfloop transitions, 31 changer transitions 0/149 dead transitions. [2024-06-14 11:20:16,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 149 transitions, 1680 flow [2024-06-14 11:20:16,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:20:16,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:20:16,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-14 11:20:16,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-14 11:20:16,814 INFO L175 Difference]: Start difference. First operand has 155 places, 137 transitions, 1352 flow. Second operand 7 states and 147 transitions. [2024-06-14 11:20:16,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 149 transitions, 1680 flow [2024-06-14 11:20:16,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 149 transitions, 1605 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 11:20:16,895 INFO L231 Difference]: Finished difference. Result has 159 places, 137 transitions, 1344 flow [2024-06-14 11:20:16,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1277, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1344, PETRI_PLACES=159, PETRI_TRANSITIONS=137} [2024-06-14 11:20:16,896 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2024-06-14 11:20:16,896 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 137 transitions, 1344 flow [2024-06-14 11:20:16,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:16,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:16,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:16,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 11:20:16,897 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:16,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:16,897 INFO L85 PathProgramCache]: Analyzing trace with hash 23382812, now seen corresponding path program 6 times [2024-06-14 11:20:16,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:16,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117015680] [2024-06-14 11:20:16,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:16,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:16,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:16,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117015680] [2024-06-14 11:20:16,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117015680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:16,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:16,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:16,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833679794] [2024-06-14 11:20:16,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:16,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:16,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:16,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:16,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:17,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:17,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 137 transitions, 1344 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:17,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:17,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:17,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:17,343 INFO L124 PetriNetUnfolderBase]: 1394/2407 cut-off events. [2024-06-14 11:20:17,343 INFO L125 PetriNetUnfolderBase]: For 88360/88360 co-relation queries the response was YES. [2024-06-14 11:20:17,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12576 conditions, 2407 events. 1394/2407 cut-off events. For 88360/88360 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 14241 event pairs, 438 based on Foata normal form. 30/2431 useless extension candidates. Maximal degree in co-relation 12497. Up to 1571 conditions per place. [2024-06-14 11:20:17,360 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 99 selfloop transitions, 59 changer transitions 4/168 dead transitions. [2024-06-14 11:20:17,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 168 transitions, 1915 flow [2024-06-14 11:20:17,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:20:17,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:20:17,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-14 11:20:17,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-14 11:20:17,362 INFO L175 Difference]: Start difference. First operand has 159 places, 137 transitions, 1344 flow. Second operand 10 states and 215 transitions. [2024-06-14 11:20:17,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 168 transitions, 1915 flow [2024-06-14 11:20:17,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 168 transitions, 1840 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 11:20:17,472 INFO L231 Difference]: Finished difference. Result has 164 places, 140 transitions, 1463 flow [2024-06-14 11:20:17,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1269, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1463, PETRI_PLACES=164, PETRI_TRANSITIONS=140} [2024-06-14 11:20:17,472 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-14 11:20:17,472 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 140 transitions, 1463 flow [2024-06-14 11:20:17,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:17,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:17,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:17,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 11:20:17,473 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:17,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:17,473 INFO L85 PathProgramCache]: Analyzing trace with hash -789865812, now seen corresponding path program 7 times [2024-06-14 11:20:17,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:17,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308337180] [2024-06-14 11:20:17,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:17,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:17,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:17,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:17,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:17,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308337180] [2024-06-14 11:20:17,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308337180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:17,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:17,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:17,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016487538] [2024-06-14 11:20:17,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:17,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:17,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:17,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:17,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:17,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:17,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 140 transitions, 1463 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:17,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:17,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:17,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:17,885 INFO L124 PetriNetUnfolderBase]: 1295/2256 cut-off events. [2024-06-14 11:20:17,886 INFO L125 PetriNetUnfolderBase]: For 68609/68609 co-relation queries the response was YES. [2024-06-14 11:20:17,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10869 conditions, 2256 events. 1295/2256 cut-off events. For 68609/68609 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 13188 event pairs, 447 based on Foata normal form. 34/2284 useless extension candidates. Maximal degree in co-relation 10788. Up to 1741 conditions per place. [2024-06-14 11:20:17,902 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 98 selfloop transitions, 52 changer transitions 3/159 dead transitions. [2024-06-14 11:20:17,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 159 transitions, 1835 flow [2024-06-14 11:20:17,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:20:17,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:20:17,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-14 11:20:17,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-14 11:20:17,903 INFO L175 Difference]: Start difference. First operand has 164 places, 140 transitions, 1463 flow. Second operand 9 states and 190 transitions. [2024-06-14 11:20:17,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 159 transitions, 1835 flow [2024-06-14 11:20:17,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 159 transitions, 1685 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-14 11:20:17,992 INFO L231 Difference]: Finished difference. Result has 164 places, 139 transitions, 1417 flow [2024-06-14 11:20:17,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1417, PETRI_PLACES=164, PETRI_TRANSITIONS=139} [2024-06-14 11:20:17,993 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-14 11:20:17,993 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 139 transitions, 1417 flow [2024-06-14 11:20:17,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:17,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:17,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:17,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 11:20:17,993 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:17,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:17,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1959420732, now seen corresponding path program 2 times [2024-06-14 11:20:17,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:17,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846783031] [2024-06-14 11:20:17,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:17,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:17,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:18,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:18,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:18,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846783031] [2024-06-14 11:20:18,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846783031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:18,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:18,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:18,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310382938] [2024-06-14 11:20:18,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:18,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:18,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:18,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:18,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:18,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:18,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 139 transitions, 1417 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:18,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:18,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:18,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:18,347 INFO L124 PetriNetUnfolderBase]: 1305/2265 cut-off events. [2024-06-14 11:20:18,348 INFO L125 PetriNetUnfolderBase]: For 44680/44680 co-relation queries the response was YES. [2024-06-14 11:20:18,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10756 conditions, 2265 events. 1305/2265 cut-off events. For 44680/44680 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 13298 event pairs, 432 based on Foata normal form. 6/2265 useless extension candidates. Maximal degree in co-relation 10676. Up to 1885 conditions per place. [2024-06-14 11:20:18,364 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 114 selfloop transitions, 36 changer transitions 0/156 dead transitions. [2024-06-14 11:20:18,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 156 transitions, 1800 flow [2024-06-14 11:20:18,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:18,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:18,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-14 11:20:18,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51875 [2024-06-14 11:20:18,365 INFO L175 Difference]: Start difference. First operand has 164 places, 139 transitions, 1417 flow. Second operand 8 states and 166 transitions. [2024-06-14 11:20:18,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 156 transitions, 1800 flow [2024-06-14 11:20:18,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 156 transitions, 1700 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 11:20:18,452 INFO L231 Difference]: Finished difference. Result has 165 places, 140 transitions, 1421 flow [2024-06-14 11:20:18,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1317, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1421, PETRI_PLACES=165, PETRI_TRANSITIONS=140} [2024-06-14 11:20:18,453 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 124 predicate places. [2024-06-14 11:20:18,453 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 140 transitions, 1421 flow [2024-06-14 11:20:18,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:18,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:18,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:18,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 11:20:18,454 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:18,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:18,454 INFO L85 PathProgramCache]: Analyzing trace with hash 436689878, now seen corresponding path program 3 times [2024-06-14 11:20:18,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:18,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860607448] [2024-06-14 11:20:18,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:18,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:18,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:18,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:18,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:18,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860607448] [2024-06-14 11:20:18,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860607448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:18,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:18,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:18,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022649450] [2024-06-14 11:20:18,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:18,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:18,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:18,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:18,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:18,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:18,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 140 transitions, 1421 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:18,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:18,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:18,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:18,829 INFO L124 PetriNetUnfolderBase]: 1325/2302 cut-off events. [2024-06-14 11:20:18,829 INFO L125 PetriNetUnfolderBase]: For 47496/47496 co-relation queries the response was YES. [2024-06-14 11:20:18,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11028 conditions, 2302 events. 1325/2302 cut-off events. For 47496/47496 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 13493 event pairs, 328 based on Foata normal form. 6/2302 useless extension candidates. Maximal degree in co-relation 10947. Up to 1781 conditions per place. [2024-06-14 11:20:18,879 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 107 selfloop transitions, 47 changer transitions 0/160 dead transitions. [2024-06-14 11:20:18,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 160 transitions, 1836 flow [2024-06-14 11:20:18,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:20:18,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:20:18,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-14 11:20:18,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-14 11:20:18,880 INFO L175 Difference]: Start difference. First operand has 165 places, 140 transitions, 1421 flow. Second operand 7 states and 155 transitions. [2024-06-14 11:20:18,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 160 transitions, 1836 flow [2024-06-14 11:20:18,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 160 transitions, 1747 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 11:20:18,956 INFO L231 Difference]: Finished difference. Result has 166 places, 141 transitions, 1459 flow [2024-06-14 11:20:18,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1332, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1459, PETRI_PLACES=166, PETRI_TRANSITIONS=141} [2024-06-14 11:20:18,957 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-14 11:20:18,957 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 141 transitions, 1459 flow [2024-06-14 11:20:18,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:18,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:18,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:18,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 11:20:18,957 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:18,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:18,958 INFO L85 PathProgramCache]: Analyzing trace with hash 436689692, now seen corresponding path program 8 times [2024-06-14 11:20:18,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:18,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332292047] [2024-06-14 11:20:18,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:18,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:18,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:19,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:19,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332292047] [2024-06-14 11:20:19,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332292047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:19,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:19,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:19,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601486014] [2024-06-14 11:20:19,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:19,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:19,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:19,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:19,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:19,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:19,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 141 transitions, 1459 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:19,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:19,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:19,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:19,385 INFO L124 PetriNetUnfolderBase]: 1548/2683 cut-off events. [2024-06-14 11:20:19,385 INFO L125 PetriNetUnfolderBase]: For 94615/94615 co-relation queries the response was YES. [2024-06-14 11:20:19,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13519 conditions, 2683 events. 1548/2683 cut-off events. For 94615/94615 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 16301 event pairs, 433 based on Foata normal form. 30/2707 useless extension candidates. Maximal degree in co-relation 13437. Up to 1383 conditions per place. [2024-06-14 11:20:19,404 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 95 selfloop transitions, 65 changer transitions 8/174 dead transitions. [2024-06-14 11:20:19,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 174 transitions, 2049 flow [2024-06-14 11:20:19,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:20:19,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:20:19,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-14 11:20:19,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-14 11:20:19,405 INFO L175 Difference]: Start difference. First operand has 166 places, 141 transitions, 1459 flow. Second operand 9 states and 201 transitions. [2024-06-14 11:20:19,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 174 transitions, 2049 flow [2024-06-14 11:20:19,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 174 transitions, 1932 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 11:20:19,503 INFO L231 Difference]: Finished difference. Result has 171 places, 142 transitions, 1501 flow [2024-06-14 11:20:19,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1345, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1501, PETRI_PLACES=171, PETRI_TRANSITIONS=142} [2024-06-14 11:20:19,503 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 130 predicate places. [2024-06-14 11:20:19,503 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 142 transitions, 1501 flow [2024-06-14 11:20:19,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:19,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:19,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:19,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 11:20:19,504 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:19,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:19,504 INFO L85 PathProgramCache]: Analyzing trace with hash 436927028, now seen corresponding path program 4 times [2024-06-14 11:20:19,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:19,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871874143] [2024-06-14 11:20:19,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:19,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:19,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:19,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:19,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871874143] [2024-06-14 11:20:19,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871874143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:19,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:19,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:20:19,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846307729] [2024-06-14 11:20:19,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:19,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:20:19,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:19,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:20:19,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:20:19,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:19,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 142 transitions, 1501 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:19,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:19,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:19,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:19,848 INFO L124 PetriNetUnfolderBase]: 1262/2174 cut-off events. [2024-06-14 11:20:19,848 INFO L125 PetriNetUnfolderBase]: For 69105/69105 co-relation queries the response was YES. [2024-06-14 11:20:19,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11394 conditions, 2174 events. 1262/2174 cut-off events. For 69105/69105 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 12472 event pairs, 273 based on Foata normal form. 6/2171 useless extension candidates. Maximal degree in co-relation 11310. Up to 1415 conditions per place. [2024-06-14 11:20:19,864 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 106 selfloop transitions, 50 changer transitions 0/162 dead transitions. [2024-06-14 11:20:19,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 162 transitions, 1889 flow [2024-06-14 11:20:19,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:20:19,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:20:19,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-14 11:20:19,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-14 11:20:19,865 INFO L175 Difference]: Start difference. First operand has 171 places, 142 transitions, 1501 flow. Second operand 6 states and 135 transitions. [2024-06-14 11:20:19,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 162 transitions, 1889 flow [2024-06-14 11:20:19,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 162 transitions, 1725 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 11:20:19,973 INFO L231 Difference]: Finished difference. Result has 170 places, 142 transitions, 1441 flow [2024-06-14 11:20:19,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1337, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1441, PETRI_PLACES=170, PETRI_TRANSITIONS=142} [2024-06-14 11:20:19,974 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 129 predicate places. [2024-06-14 11:20:19,974 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 142 transitions, 1441 flow [2024-06-14 11:20:19,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:19,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:19,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:19,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 11:20:19,975 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:19,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:19,975 INFO L85 PathProgramCache]: Analyzing trace with hash -422772606, now seen corresponding path program 9 times [2024-06-14 11:20:19,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:19,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135784191] [2024-06-14 11:20:19,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:19,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:19,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:20,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:20,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:20,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135784191] [2024-06-14 11:20:20,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135784191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:20,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:20,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:20,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939665394] [2024-06-14 11:20:20,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:20,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:20,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:20,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:20,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:20,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:20,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 142 transitions, 1441 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:20,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:20,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:20,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:20,325 INFO L124 PetriNetUnfolderBase]: 1163/2014 cut-off events. [2024-06-14 11:20:20,325 INFO L125 PetriNetUnfolderBase]: For 45546/45546 co-relation queries the response was YES. [2024-06-14 11:20:20,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9741 conditions, 2014 events. 1163/2014 cut-off events. For 45546/45546 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 11419 event pairs, 379 based on Foata normal form. 8/2017 useless extension candidates. Maximal degree in co-relation 9657. Up to 1690 conditions per place. [2024-06-14 11:20:20,340 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 98 selfloop transitions, 52 changer transitions 0/156 dead transitions. [2024-06-14 11:20:20,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 156 transitions, 1809 flow [2024-06-14 11:20:20,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:20,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:20,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-14 11:20:20,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521875 [2024-06-14 11:20:20,342 INFO L175 Difference]: Start difference. First operand has 170 places, 142 transitions, 1441 flow. Second operand 8 states and 167 transitions. [2024-06-14 11:20:20,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 156 transitions, 1809 flow [2024-06-14 11:20:20,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 156 transitions, 1591 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 11:20:20,434 INFO L231 Difference]: Finished difference. Result has 170 places, 143 transitions, 1358 flow [2024-06-14 11:20:20,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1223, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1358, PETRI_PLACES=170, PETRI_TRANSITIONS=143} [2024-06-14 11:20:20,434 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 129 predicate places. [2024-06-14 11:20:20,434 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 143 transitions, 1358 flow [2024-06-14 11:20:20,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:20,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:20,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:20,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 11:20:20,435 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:20,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:20,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1817276100, now seen corresponding path program 10 times [2024-06-14 11:20:20,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:20,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560822114] [2024-06-14 11:20:20,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:20,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:20,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:20,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:20,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560822114] [2024-06-14 11:20:20,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560822114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:20,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:20,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:20,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079980134] [2024-06-14 11:20:20,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:20,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:20,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:20,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:20,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:20,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:20,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 143 transitions, 1358 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:20,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:20,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:20,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:20,784 INFO L124 PetriNetUnfolderBase]: 1178/2051 cut-off events. [2024-06-14 11:20:20,785 INFO L125 PetriNetUnfolderBase]: For 45056/45056 co-relation queries the response was YES. [2024-06-14 11:20:20,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9321 conditions, 2051 events. 1178/2051 cut-off events. For 45056/45056 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 11753 event pairs, 376 based on Foata normal form. 8/2054 useless extension candidates. Maximal degree in co-relation 9239. Up to 1607 conditions per place. [2024-06-14 11:20:20,799 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 101 selfloop transitions, 54 changer transitions 0/161 dead transitions. [2024-06-14 11:20:20,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 161 transitions, 1762 flow [2024-06-14 11:20:20,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:20,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:20,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-14 11:20:20,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-14 11:20:20,801 INFO L175 Difference]: Start difference. First operand has 170 places, 143 transitions, 1358 flow. Second operand 8 states and 170 transitions. [2024-06-14 11:20:20,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 161 transitions, 1762 flow [2024-06-14 11:20:20,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 161 transitions, 1641 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 11:20:20,878 INFO L231 Difference]: Finished difference. Result has 172 places, 144 transitions, 1377 flow [2024-06-14 11:20:20,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1237, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1377, PETRI_PLACES=172, PETRI_TRANSITIONS=144} [2024-06-14 11:20:20,879 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-14 11:20:20,879 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 144 transitions, 1377 flow [2024-06-14 11:20:20,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:20,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:20,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:20,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 11:20:20,880 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:20,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:20,880 INFO L85 PathProgramCache]: Analyzing trace with hash -2133485176, now seen corresponding path program 11 times [2024-06-14 11:20:20,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:20,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861809406] [2024-06-14 11:20:20,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:20,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:20,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:20,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:20,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861809406] [2024-06-14 11:20:20,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861809406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:20,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:20,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:20,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750195563] [2024-06-14 11:20:20,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:20,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:20,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:20,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:20,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:21,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:21,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 144 transitions, 1377 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:21,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:21,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:21,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:21,272 INFO L124 PetriNetUnfolderBase]: 1198/2079 cut-off events. [2024-06-14 11:20:21,272 INFO L125 PetriNetUnfolderBase]: For 45324/45324 co-relation queries the response was YES. [2024-06-14 11:20:21,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9510 conditions, 2079 events. 1198/2079 cut-off events. For 45324/45324 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 11897 event pairs, 385 based on Foata normal form. 6/2080 useless extension candidates. Maximal degree in co-relation 9427. Up to 1768 conditions per place. [2024-06-14 11:20:21,287 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 119 selfloop transitions, 34 changer transitions 0/159 dead transitions. [2024-06-14 11:20:21,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 159 transitions, 1749 flow [2024-06-14 11:20:21,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:21,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:21,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-14 11:20:21,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-06-14 11:20:21,288 INFO L175 Difference]: Start difference. First operand has 172 places, 144 transitions, 1377 flow. Second operand 8 states and 164 transitions. [2024-06-14 11:20:21,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 159 transitions, 1749 flow [2024-06-14 11:20:21,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 159 transitions, 1621 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 11:20:21,374 INFO L231 Difference]: Finished difference. Result has 174 places, 145 transitions, 1351 flow [2024-06-14 11:20:21,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1249, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1351, PETRI_PLACES=174, PETRI_TRANSITIONS=145} [2024-06-14 11:20:21,374 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 133 predicate places. [2024-06-14 11:20:21,374 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 145 transitions, 1351 flow [2024-06-14 11:20:21,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:21,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:21,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:21,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 11:20:21,375 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:21,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:21,375 INFO L85 PathProgramCache]: Analyzing trace with hash -2133605146, now seen corresponding path program 12 times [2024-06-14 11:20:21,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:21,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429850299] [2024-06-14 11:20:21,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:21,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:21,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:21,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:21,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:21,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429850299] [2024-06-14 11:20:21,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429850299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:21,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:21,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:21,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975450784] [2024-06-14 11:20:21,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:21,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:21,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:21,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:21,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:21,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:21,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 145 transitions, 1351 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:21,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:21,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:21,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:21,724 INFO L124 PetriNetUnfolderBase]: 1218/2117 cut-off events. [2024-06-14 11:20:21,724 INFO L125 PetriNetUnfolderBase]: For 47425/47425 co-relation queries the response was YES. [2024-06-14 11:20:21,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9590 conditions, 2117 events. 1218/2117 cut-off events. For 47425/47425 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 12259 event pairs, 378 based on Foata normal form. 6/2118 useless extension candidates. Maximal degree in co-relation 9506. Up to 1547 conditions per place. [2024-06-14 11:20:21,739 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 99 selfloop transitions, 60 changer transitions 0/165 dead transitions. [2024-06-14 11:20:21,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 165 transitions, 1771 flow [2024-06-14 11:20:21,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:21,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:21,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-14 11:20:21,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-14 11:20:21,740 INFO L175 Difference]: Start difference. First operand has 174 places, 145 transitions, 1351 flow. Second operand 8 states and 172 transitions. [2024-06-14 11:20:21,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 165 transitions, 1771 flow [2024-06-14 11:20:21,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 165 transitions, 1653 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 11:20:21,839 INFO L231 Difference]: Finished difference. Result has 175 places, 146 transitions, 1389 flow [2024-06-14 11:20:21,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1389, PETRI_PLACES=175, PETRI_TRANSITIONS=146} [2024-06-14 11:20:21,840 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-06-14 11:20:21,840 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 146 transitions, 1389 flow [2024-06-14 11:20:21,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:21,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:21,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:21,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 11:20:21,840 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:21,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:21,841 INFO L85 PathProgramCache]: Analyzing trace with hash 834469572, now seen corresponding path program 13 times [2024-06-14 11:20:21,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:21,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098923724] [2024-06-14 11:20:21,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:21,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:21,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:21,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:21,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098923724] [2024-06-14 11:20:21,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098923724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:21,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:21,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:21,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304662261] [2024-06-14 11:20:21,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:21,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:21,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:21,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:21,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:21,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:21,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 146 transitions, 1389 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:21,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:21,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:21,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:22,231 INFO L124 PetriNetUnfolderBase]: 1279/2220 cut-off events. [2024-06-14 11:20:22,232 INFO L125 PetriNetUnfolderBase]: For 57668/57668 co-relation queries the response was YES. [2024-06-14 11:20:22,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10559 conditions, 2220 events. 1279/2220 cut-off events. For 57668/57668 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 12891 event pairs, 301 based on Foata normal form. 6/2221 useless extension candidates. Maximal degree in co-relation 10475. Up to 1706 conditions per place. [2024-06-14 11:20:22,247 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 114 selfloop transitions, 53 changer transitions 0/173 dead transitions. [2024-06-14 11:20:22,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 173 transitions, 1975 flow [2024-06-14 11:20:22,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:20:22,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:20:22,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-14 11:20:22,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5222222222222223 [2024-06-14 11:20:22,248 INFO L175 Difference]: Start difference. First operand has 175 places, 146 transitions, 1389 flow. Second operand 9 states and 188 transitions. [2024-06-14 11:20:22,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 173 transitions, 1975 flow [2024-06-14 11:20:22,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 173 transitions, 1824 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 11:20:22,351 INFO L231 Difference]: Finished difference. Result has 177 places, 150 transitions, 1430 flow [2024-06-14 11:20:22,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1240, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1430, PETRI_PLACES=177, PETRI_TRANSITIONS=150} [2024-06-14 11:20:22,351 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-14 11:20:22,351 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 150 transitions, 1430 flow [2024-06-14 11:20:22,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:22,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:22,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:22,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 11:20:22,352 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:22,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:22,352 INFO L85 PathProgramCache]: Analyzing trace with hash -82564728, now seen corresponding path program 14 times [2024-06-14 11:20:22,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:22,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079971623] [2024-06-14 11:20:22,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:22,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:22,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:22,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:22,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:22,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079971623] [2024-06-14 11:20:22,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079971623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:22,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:22,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:22,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143103553] [2024-06-14 11:20:22,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:22,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:22,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:22,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:22,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:22,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:22,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 150 transitions, 1430 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:22,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:22,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:22,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:22,743 INFO L124 PetriNetUnfolderBase]: 1266/2193 cut-off events. [2024-06-14 11:20:22,744 INFO L125 PetriNetUnfolderBase]: For 50353/50353 co-relation queries the response was YES. [2024-06-14 11:20:22,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9998 conditions, 2193 events. 1266/2193 cut-off events. For 50353/50353 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 12760 event pairs, 291 based on Foata normal form. 6/2194 useless extension candidates. Maximal degree in co-relation 9914. Up to 1772 conditions per place. [2024-06-14 11:20:22,759 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 112 selfloop transitions, 50 changer transitions 0/168 dead transitions. [2024-06-14 11:20:22,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 168 transitions, 1816 flow [2024-06-14 11:20:22,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:22,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:22,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-14 11:20:22,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.528125 [2024-06-14 11:20:22,760 INFO L175 Difference]: Start difference. First operand has 177 places, 150 transitions, 1430 flow. Second operand 8 states and 169 transitions. [2024-06-14 11:20:22,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 168 transitions, 1816 flow [2024-06-14 11:20:22,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 168 transitions, 1697 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-14 11:20:22,854 INFO L231 Difference]: Finished difference. Result has 181 places, 150 transitions, 1415 flow [2024-06-14 11:20:22,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1311, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1415, PETRI_PLACES=181, PETRI_TRANSITIONS=150} [2024-06-14 11:20:22,855 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-14 11:20:22,855 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 150 transitions, 1415 flow [2024-06-14 11:20:22,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:22,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:22,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:22,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 11:20:22,855 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:22,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:22,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1994765280, now seen corresponding path program 15 times [2024-06-14 11:20:22,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:22,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300554836] [2024-06-14 11:20:22,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:22,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:22,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:22,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:22,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300554836] [2024-06-14 11:20:22,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300554836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:22,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:22,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:22,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938504628] [2024-06-14 11:20:22,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:22,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:22,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:22,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:22,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:22,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:22,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 150 transitions, 1415 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:22,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:22,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:22,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:23,243 INFO L124 PetriNetUnfolderBase]: 1380/2377 cut-off events. [2024-06-14 11:20:23,243 INFO L125 PetriNetUnfolderBase]: For 73421/73421 co-relation queries the response was YES. [2024-06-14 11:20:23,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11365 conditions, 2377 events. 1380/2377 cut-off events. For 73421/73421 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 13975 event pairs, 411 based on Foata normal form. 6/2378 useless extension candidates. Maximal degree in co-relation 11280. Up to 1240 conditions per place. [2024-06-14 11:20:23,261 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 91 selfloop transitions, 76 changer transitions 0/173 dead transitions. [2024-06-14 11:20:23,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 173 transitions, 1933 flow [2024-06-14 11:20:23,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:23,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:23,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-14 11:20:23,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-14 11:20:23,263 INFO L175 Difference]: Start difference. First operand has 181 places, 150 transitions, 1415 flow. Second operand 8 states and 174 transitions. [2024-06-14 11:20:23,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 173 transitions, 1933 flow [2024-06-14 11:20:23,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 173 transitions, 1807 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 11:20:23,443 INFO L231 Difference]: Finished difference. Result has 181 places, 150 transitions, 1445 flow [2024-06-14 11:20:23,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1445, PETRI_PLACES=181, PETRI_TRANSITIONS=150} [2024-06-14 11:20:23,444 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-14 11:20:23,445 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 150 transitions, 1445 flow [2024-06-14 11:20:23,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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) [2024-06-14 11:20:23,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:23,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:23,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 11:20:23,445 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:23,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:23,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1417345264, now seen corresponding path program 1 times [2024-06-14 11:20:23,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:23,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862396524] [2024-06-14 11:20:23,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:23,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:23,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:23,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:23,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862396524] [2024-06-14 11:20:23,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862396524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:23,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:23,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:23,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118425235] [2024-06-14 11:20:23,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:23,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:23,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:23,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:23,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:23,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:23,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 150 transitions, 1445 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 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) [2024-06-14 11:20:23,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:23,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:23,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:23,940 INFO L124 PetriNetUnfolderBase]: 1582/2757 cut-off events. [2024-06-14 11:20:23,941 INFO L125 PetriNetUnfolderBase]: For 120138/120139 co-relation queries the response was YES. [2024-06-14 11:20:23,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13861 conditions, 2757 events. 1582/2757 cut-off events. For 120138/120139 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 16993 event pairs, 324 based on Foata normal form. 19/2772 useless extension candidates. Maximal degree in co-relation 13775. Up to 1872 conditions per place. [2024-06-14 11:20:23,960 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 141 selfloop transitions, 27 changer transitions 11/185 dead transitions. [2024-06-14 11:20:23,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 185 transitions, 2046 flow [2024-06-14 11:20:23,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:20:23,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:20:23,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 11:20:23,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-14 11:20:23,961 INFO L175 Difference]: Start difference. First operand has 181 places, 150 transitions, 1445 flow. Second operand 7 states and 164 transitions. [2024-06-14 11:20:23,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 185 transitions, 2046 flow [2024-06-14 11:20:24,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 185 transitions, 1802 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-14 11:20:24,147 INFO L231 Difference]: Finished difference. Result has 181 places, 150 transitions, 1278 flow [2024-06-14 11:20:24,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1278, PETRI_PLACES=181, PETRI_TRANSITIONS=150} [2024-06-14 11:20:24,147 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-14 11:20:24,147 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 150 transitions, 1278 flow [2024-06-14 11:20:24,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 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) [2024-06-14 11:20:24,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:24,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:24,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 11:20:24,148 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:24,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:24,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1502548144, now seen corresponding path program 2 times [2024-06-14 11:20:24,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:24,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159741453] [2024-06-14 11:20:24,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:24,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:24,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:24,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:24,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159741453] [2024-06-14 11:20:24,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159741453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:24,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:24,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:24,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883438874] [2024-06-14 11:20:24,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:24,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:24,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:24,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:24,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:24,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:24,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 150 transitions, 1278 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 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) [2024-06-14 11:20:24,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:24,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:24,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:24,579 INFO L124 PetriNetUnfolderBase]: 1371/2402 cut-off events. [2024-06-14 11:20:24,580 INFO L125 PetriNetUnfolderBase]: For 82343/82344 co-relation queries the response was YES. [2024-06-14 11:20:24,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10594 conditions, 2402 events. 1371/2402 cut-off events. For 82343/82344 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 14421 event pairs, 306 based on Foata normal form. 19/2417 useless extension candidates. Maximal degree in co-relation 10508. Up to 1667 conditions per place. [2024-06-14 11:20:24,597 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 140 selfloop transitions, 22 changer transitions 10/178 dead transitions. [2024-06-14 11:20:24,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 178 transitions, 1824 flow [2024-06-14 11:20:24,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:20:24,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:20:24,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-14 11:20:24,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-06-14 11:20:24,598 INFO L175 Difference]: Start difference. First operand has 181 places, 150 transitions, 1278 flow. Second operand 7 states and 158 transitions. [2024-06-14 11:20:24,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 178 transitions, 1824 flow [2024-06-14 11:20:24,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 178 transitions, 1778 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 11:20:24,755 INFO L231 Difference]: Finished difference. Result has 180 places, 146 transitions, 1243 flow [2024-06-14 11:20:24,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1243, PETRI_PLACES=180, PETRI_TRANSITIONS=146} [2024-06-14 11:20:24,755 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 139 predicate places. [2024-06-14 11:20:24,755 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 146 transitions, 1243 flow [2024-06-14 11:20:24,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 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) [2024-06-14 11:20:24,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:24,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:24,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 11:20:24,756 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:24,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:24,756 INFO L85 PathProgramCache]: Analyzing trace with hash 790980898, now seen corresponding path program 1 times [2024-06-14 11:20:24,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:24,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796938218] [2024-06-14 11:20:24,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:24,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:24,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:24,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:24,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:24,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796938218] [2024-06-14 11:20:24,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796938218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:24,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:24,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:24,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328235318] [2024-06-14 11:20:24,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:24,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:24,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:24,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:24,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:24,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:24,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 146 transitions, 1243 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 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) [2024-06-14 11:20:24,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:24,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:24,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:25,164 INFO L124 PetriNetUnfolderBase]: 1335/2334 cut-off events. [2024-06-14 11:20:25,164 INFO L125 PetriNetUnfolderBase]: For 79149/79150 co-relation queries the response was YES. [2024-06-14 11:20:25,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10268 conditions, 2334 events. 1335/2334 cut-off events. For 79149/79150 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 13891 event pairs, 237 based on Foata normal form. 19/2349 useless extension candidates. Maximal degree in co-relation 10183. Up to 1667 conditions per place. [2024-06-14 11:20:25,181 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 138 selfloop transitions, 23 changer transitions 8/175 dead transitions. [2024-06-14 11:20:25,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 175 transitions, 1791 flow [2024-06-14 11:20:25,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:20:25,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:20:25,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-14 11:20:25,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5678571428571428 [2024-06-14 11:20:25,182 INFO L175 Difference]: Start difference. First operand has 180 places, 146 transitions, 1243 flow. Second operand 7 states and 159 transitions. [2024-06-14 11:20:25,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 175 transitions, 1791 flow [2024-06-14 11:20:25,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 175 transitions, 1737 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 11:20:25,340 INFO L231 Difference]: Finished difference. Result has 176 places, 144 transitions, 1223 flow [2024-06-14 11:20:25,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1223, PETRI_PLACES=176, PETRI_TRANSITIONS=144} [2024-06-14 11:20:25,340 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 135 predicate places. [2024-06-14 11:20:25,341 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 144 transitions, 1223 flow [2024-06-14 11:20:25,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 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) [2024-06-14 11:20:25,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:25,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:25,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 11:20:25,341 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:25,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:25,342 INFO L85 PathProgramCache]: Analyzing trace with hash 790986478, now seen corresponding path program 2 times [2024-06-14 11:20:25,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:25,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082081354] [2024-06-14 11:20:25,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:25,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:25,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:25,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:25,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082081354] [2024-06-14 11:20:25,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082081354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:25,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:25,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:25,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381210893] [2024-06-14 11:20:25,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:25,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:25,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:25,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:25,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:25,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:25,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 144 transitions, 1223 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 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) [2024-06-14 11:20:25,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:25,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:25,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:25,736 INFO L124 PetriNetUnfolderBase]: 1230/2147 cut-off events. [2024-06-14 11:20:25,737 INFO L125 PetriNetUnfolderBase]: For 57126/57127 co-relation queries the response was YES. [2024-06-14 11:20:25,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8797 conditions, 2147 events. 1230/2147 cut-off events. For 57126/57127 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 12557 event pairs, 219 based on Foata normal form. 19/2162 useless extension candidates. Maximal degree in co-relation 8714. Up to 1667 conditions per place. [2024-06-14 11:20:25,751 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 135 selfloop transitions, 20 changer transitions 10/171 dead transitions. [2024-06-14 11:20:25,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 171 transitions, 1653 flow [2024-06-14 11:20:25,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:20:25,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:20:25,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-14 11:20:25,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-14 11:20:25,752 INFO L175 Difference]: Start difference. First operand has 176 places, 144 transitions, 1223 flow. Second operand 7 states and 157 transitions. [2024-06-14 11:20:25,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 171 transitions, 1653 flow [2024-06-14 11:20:25,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 171 transitions, 1603 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 11:20:25,869 INFO L231 Difference]: Finished difference. Result has 175 places, 140 transitions, 1171 flow [2024-06-14 11:20:25,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1171, PETRI_PLACES=175, PETRI_TRANSITIONS=140} [2024-06-14 11:20:25,870 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-06-14 11:20:25,870 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 140 transitions, 1171 flow [2024-06-14 11:20:25,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 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) [2024-06-14 11:20:25,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:25,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:25,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 11:20:25,871 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:25,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:25,871 INFO L85 PathProgramCache]: Analyzing trace with hash 819070702, now seen corresponding path program 3 times [2024-06-14 11:20:25,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:25,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882107054] [2024-06-14 11:20:25,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:25,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:25,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:25,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:25,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:25,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882107054] [2024-06-14 11:20:25,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882107054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:25,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:25,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:25,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673883747] [2024-06-14 11:20:25,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:25,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:25,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:25,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:25,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:26,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:26,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 140 transitions, 1171 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 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) [2024-06-14 11:20:26,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:26,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:26,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:26,292 INFO L124 PetriNetUnfolderBase]: 1283/2244 cut-off events. [2024-06-14 11:20:26,292 INFO L125 PetriNetUnfolderBase]: For 79192/79193 co-relation queries the response was YES. [2024-06-14 11:20:26,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9897 conditions, 2244 events. 1283/2244 cut-off events. For 79192/79193 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 13251 event pairs, 239 based on Foata normal form. 19/2260 useless extension candidates. Maximal degree in co-relation 9814. Up to 1579 conditions per place. [2024-06-14 11:20:26,308 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 141 selfloop transitions, 24 changer transitions 8/179 dead transitions. [2024-06-14 11:20:26,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 179 transitions, 1763 flow [2024-06-14 11:20:26,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:20:26,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:20:26,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-14 11:20:26,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5275 [2024-06-14 11:20:26,309 INFO L175 Difference]: Start difference. First operand has 175 places, 140 transitions, 1171 flow. Second operand 10 states and 211 transitions. [2024-06-14 11:20:26,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 179 transitions, 1763 flow [2024-06-14 11:20:26,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 179 transitions, 1691 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 11:20:26,454 INFO L231 Difference]: Finished difference. Result has 176 places, 138 transitions, 1135 flow [2024-06-14 11:20:26,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1101, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1135, PETRI_PLACES=176, PETRI_TRANSITIONS=138} [2024-06-14 11:20:26,455 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 135 predicate places. [2024-06-14 11:20:26,455 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 138 transitions, 1135 flow [2024-06-14 11:20:26,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 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) [2024-06-14 11:20:26,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:26,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:26,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 11:20:26,456 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:26,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:26,456 INFO L85 PathProgramCache]: Analyzing trace with hash 819065122, now seen corresponding path program 4 times [2024-06-14 11:20:26,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:26,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092369856] [2024-06-14 11:20:26,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:26,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:26,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:26,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:26,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:26,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092369856] [2024-06-14 11:20:26,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092369856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:26,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:26,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:26,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678126224] [2024-06-14 11:20:26,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:26,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:26,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:26,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:26,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:26,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:26,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 138 transitions, 1135 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 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) [2024-06-14 11:20:26,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:26,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:26,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:26,872 INFO L124 PetriNetUnfolderBase]: 1178/2057 cut-off events. [2024-06-14 11:20:26,872 INFO L125 PetriNetUnfolderBase]: For 56995/56996 co-relation queries the response was YES. [2024-06-14 11:20:26,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8449 conditions, 2057 events. 1178/2057 cut-off events. For 56995/56996 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 11932 event pairs, 227 based on Foata normal form. 19/2073 useless extension candidates. Maximal degree in co-relation 8366. Up to 1579 conditions per place. [2024-06-14 11:20:26,886 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 129 selfloop transitions, 21 changer transitions 12/168 dead transitions. [2024-06-14 11:20:26,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 168 transitions, 1573 flow [2024-06-14 11:20:26,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:26,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:26,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-14 11:20:26,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-14 11:20:26,888 INFO L175 Difference]: Start difference. First operand has 176 places, 138 transitions, 1135 flow. Second operand 8 states and 174 transitions. [2024-06-14 11:20:26,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 168 transitions, 1573 flow [2024-06-14 11:20:27,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 168 transitions, 1498 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-14 11:20:27,004 INFO L231 Difference]: Finished difference. Result has 172 places, 136 transitions, 1091 flow [2024-06-14 11:20:27,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1091, PETRI_PLACES=172, PETRI_TRANSITIONS=136} [2024-06-14 11:20:27,005 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-14 11:20:27,005 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 136 transitions, 1091 flow [2024-06-14 11:20:27,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 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) [2024-06-14 11:20:27,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:27,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:27,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 11:20:27,006 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:27,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:27,006 INFO L85 PathProgramCache]: Analyzing trace with hash 815346052, now seen corresponding path program 5 times [2024-06-14 11:20:27,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:27,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973352365] [2024-06-14 11:20:27,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:27,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:27,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:27,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:27,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:27,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973352365] [2024-06-14 11:20:27,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973352365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:27,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:27,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:27,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912557786] [2024-06-14 11:20:27,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:27,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:27,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:27,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:27,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:27,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:27,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 136 transitions, 1091 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 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) [2024-06-14 11:20:27,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:27,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:27,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:27,563 INFO L124 PetriNetUnfolderBase]: 1154/2005 cut-off events. [2024-06-14 11:20:27,576 INFO L125 PetriNetUnfolderBase]: For 56873/56874 co-relation queries the response was YES. [2024-06-14 11:20:27,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8193 conditions, 2005 events. 1154/2005 cut-off events. For 56873/56874 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 11480 event pairs, 246 based on Foata normal form. 19/2021 useless extension candidates. Maximal degree in co-relation 8112. Up to 1511 conditions per place. [2024-06-14 11:20:27,604 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 123 selfloop transitions, 17 changer transitions 20/166 dead transitions. [2024-06-14 11:20:27,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 166 transitions, 1525 flow [2024-06-14 11:20:27,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:27,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:27,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-14 11:20:27,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-14 11:20:27,605 INFO L175 Difference]: Start difference. First operand has 172 places, 136 transitions, 1091 flow. Second operand 8 states and 172 transitions. [2024-06-14 11:20:27,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 166 transitions, 1525 flow [2024-06-14 11:20:27,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 166 transitions, 1479 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 11:20:27,798 INFO L231 Difference]: Finished difference. Result has 169 places, 130 transitions, 1028 flow [2024-06-14 11:20:27,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1045, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1028, PETRI_PLACES=169, PETRI_TRANSITIONS=130} [2024-06-14 11:20:27,798 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2024-06-14 11:20:27,798 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 130 transitions, 1028 flow [2024-06-14 11:20:27,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 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) [2024-06-14 11:20:27,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:27,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:27,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 11:20:27,799 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:27,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:27,799 INFO L85 PathProgramCache]: Analyzing trace with hash 2039329870, now seen corresponding path program 3 times [2024-06-14 11:20:27,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:27,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416389655] [2024-06-14 11:20:27,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:27,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:27,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:27,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:27,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416389655] [2024-06-14 11:20:27,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416389655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:27,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:27,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:27,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445129184] [2024-06-14 11:20:27,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:27,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:27,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:27,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:27,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:27,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:27,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 130 transitions, 1028 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:27,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:27,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:27,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:28,306 INFO L124 PetriNetUnfolderBase]: 1327/2298 cut-off events. [2024-06-14 11:20:28,306 INFO L125 PetriNetUnfolderBase]: For 112501/112502 co-relation queries the response was YES. [2024-06-14 11:20:28,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11478 conditions, 2298 events. 1327/2298 cut-off events. For 112501/112502 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 13713 event pairs, 418 based on Foata normal form. 19/2313 useless extension candidates. Maximal degree in co-relation 11398. Up to 1268 conditions per place. [2024-06-14 11:20:28,323 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 118 selfloop transitions, 43 changer transitions 11/178 dead transitions. [2024-06-14 11:20:28,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 178 transitions, 1736 flow [2024-06-14 11:20:28,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:20:28,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:20:28,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 273 transitions. [2024-06-14 11:20:28,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-14 11:20:28,324 INFO L175 Difference]: Start difference. First operand has 169 places, 130 transitions, 1028 flow. Second operand 13 states and 273 transitions. [2024-06-14 11:20:28,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 178 transitions, 1736 flow [2024-06-14 11:20:28,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 178 transitions, 1629 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-14 11:20:28,531 INFO L231 Difference]: Finished difference. Result has 165 places, 128 transitions, 1008 flow [2024-06-14 11:20:28,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1008, PETRI_PLACES=165, PETRI_TRANSITIONS=128} [2024-06-14 11:20:28,534 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 124 predicate places. [2024-06-14 11:20:28,534 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 128 transitions, 1008 flow [2024-06-14 11:20:28,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:28,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:28,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:28,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 11:20:28,535 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:28,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:28,535 INFO L85 PathProgramCache]: Analyzing trace with hash 2039628400, now seen corresponding path program 4 times [2024-06-14 11:20:28,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:28,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176785294] [2024-06-14 11:20:28,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:28,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:28,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:28,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:28,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:28,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176785294] [2024-06-14 11:20:28,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176785294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:28,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:28,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:28,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821654] [2024-06-14 11:20:28,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:28,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:28,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:28,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:28,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:28,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:28,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 128 transitions, 1008 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:28,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:28,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:28,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:29,014 INFO L124 PetriNetUnfolderBase]: 1390/2399 cut-off events. [2024-06-14 11:20:29,014 INFO L125 PetriNetUnfolderBase]: For 129555/129556 co-relation queries the response was YES. [2024-06-14 11:20:29,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12722 conditions, 2399 events. 1390/2399 cut-off events. For 129555/129556 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 14453 event pairs, 498 based on Foata normal form. 19/2414 useless extension candidates. Maximal degree in co-relation 12647. Up to 1268 conditions per place. [2024-06-14 11:20:29,033 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 117 selfloop transitions, 41 changer transitions 9/173 dead transitions. [2024-06-14 11:20:29,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 173 transitions, 1690 flow [2024-06-14 11:20:29,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:20:29,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:20:29,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 270 transitions. [2024-06-14 11:20:29,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-14 11:20:29,036 INFO L175 Difference]: Start difference. First operand has 165 places, 128 transitions, 1008 flow. Second operand 13 states and 270 transitions. [2024-06-14 11:20:29,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 173 transitions, 1690 flow [2024-06-14 11:20:29,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 173 transitions, 1594 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-14 11:20:29,182 INFO L231 Difference]: Finished difference. Result has 164 places, 125 transitions, 982 flow [2024-06-14 11:20:29,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=982, PETRI_PLACES=164, PETRI_TRANSITIONS=125} [2024-06-14 11:20:29,182 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-14 11:20:29,182 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 125 transitions, 982 flow [2024-06-14 11:20:29,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:29,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:29,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:29,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 11:20:29,183 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:29,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:29,183 INFO L85 PathProgramCache]: Analyzing trace with hash 348325792, now seen corresponding path program 5 times [2024-06-14 11:20:29,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:29,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770269639] [2024-06-14 11:20:29,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:29,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:29,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:29,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:29,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770269639] [2024-06-14 11:20:29,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770269639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:29,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:29,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:29,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86062271] [2024-06-14 11:20:29,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:29,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:29,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:29,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:29,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:29,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:29,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 125 transitions, 982 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:29,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:29,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:29,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:29,590 INFO L124 PetriNetUnfolderBase]: 1264/2181 cut-off events. [2024-06-14 11:20:29,591 INFO L125 PetriNetUnfolderBase]: For 105377/105378 co-relation queries the response was YES. [2024-06-14 11:20:29,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10856 conditions, 2181 events. 1264/2181 cut-off events. For 105377/105378 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 12808 event pairs, 482 based on Foata normal form. 25/2202 useless extension candidates. Maximal degree in co-relation 10782. Up to 1502 conditions per place. [2024-06-14 11:20:29,605 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 106 selfloop transitions, 38 changer transitions 13/163 dead transitions. [2024-06-14 11:20:29,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 163 transitions, 1520 flow [2024-06-14 11:20:29,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:20:29,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:20:29,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2024-06-14 11:20:29,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5145833333333333 [2024-06-14 11:20:29,613 INFO L175 Difference]: Start difference. First operand has 164 places, 125 transitions, 982 flow. Second operand 12 states and 247 transitions. [2024-06-14 11:20:29,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 163 transitions, 1520 flow [2024-06-14 11:20:29,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 163 transitions, 1427 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-06-14 11:20:29,749 INFO L231 Difference]: Finished difference. Result has 160 places, 122 transitions, 946 flow [2024-06-14 11:20:29,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=895, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=946, PETRI_PLACES=160, PETRI_TRANSITIONS=122} [2024-06-14 11:20:29,750 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 119 predicate places. [2024-06-14 11:20:29,750 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 122 transitions, 946 flow [2024-06-14 11:20:29,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:29,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:29,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:29,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 11:20:29,750 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:29,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:29,751 INFO L85 PathProgramCache]: Analyzing trace with hash 154446832, now seen corresponding path program 6 times [2024-06-14 11:20:29,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:29,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377009794] [2024-06-14 11:20:29,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:29,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:29,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:29,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:29,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:29,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377009794] [2024-06-14 11:20:29,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377009794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:29,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:29,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:29,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582549371] [2024-06-14 11:20:29,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:29,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:29,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:29,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:29,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:29,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:29,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 122 transitions, 946 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:29,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:29,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:29,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:30,237 INFO L124 PetriNetUnfolderBase]: 1204/2069 cut-off events. [2024-06-14 11:20:30,237 INFO L125 PetriNetUnfolderBase]: For 98730/98731 co-relation queries the response was YES. [2024-06-14 11:20:30,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10306 conditions, 2069 events. 1204/2069 cut-off events. For 98730/98731 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 11976 event pairs, 508 based on Foata normal form. 27/2092 useless extension candidates. Maximal degree in co-relation 10234. Up to 1713 conditions per place. [2024-06-14 11:20:30,251 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 94 selfloop transitions, 33 changer transitions 17/150 dead transitions. [2024-06-14 11:20:30,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 150 transitions, 1322 flow [2024-06-14 11:20:30,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:20:30,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:20:30,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 237 transitions. [2024-06-14 11:20:30,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49375 [2024-06-14 11:20:30,252 INFO L175 Difference]: Start difference. First operand has 160 places, 122 transitions, 946 flow. Second operand 12 states and 237 transitions. [2024-06-14 11:20:30,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 150 transitions, 1322 flow [2024-06-14 11:20:30,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 150 transitions, 1248 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-14 11:20:30,333 INFO L231 Difference]: Finished difference. Result has 158 places, 117 transitions, 906 flow [2024-06-14 11:20:30,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=906, PETRI_PLACES=158, PETRI_TRANSITIONS=117} [2024-06-14 11:20:30,333 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 117 predicate places. [2024-06-14 11:20:30,334 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 117 transitions, 906 flow [2024-06-14 11:20:30,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:30,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:30,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:30,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 11:20:30,334 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:30,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:30,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1319196880, now seen corresponding path program 7 times [2024-06-14 11:20:30,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:30,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557105731] [2024-06-14 11:20:30,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:30,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:30,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:30,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:30,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557105731] [2024-06-14 11:20:30,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557105731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:30,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:30,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:30,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402363389] [2024-06-14 11:20:30,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:30,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:30,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:30,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:30,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:30,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:30,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 117 transitions, 906 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:30,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:30,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:30,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:30,691 INFO L124 PetriNetUnfolderBase]: 1071/1846 cut-off events. [2024-06-14 11:20:30,692 INFO L125 PetriNetUnfolderBase]: For 70349/70350 co-relation queries the response was YES. [2024-06-14 11:20:30,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8462 conditions, 1846 events. 1071/1846 cut-off events. For 70349/70350 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 10431 event pairs, 384 based on Foata normal form. 25/1867 useless extension candidates. Maximal degree in co-relation 8391. Up to 1268 conditions per place. [2024-06-14 11:20:30,703 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 101 selfloop transitions, 31 changer transitions 10/148 dead transitions. [2024-06-14 11:20:30,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 148 transitions, 1390 flow [2024-06-14 11:20:30,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:20:30,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:20:30,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-14 11:20:30,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5068181818181818 [2024-06-14 11:20:30,704 INFO L175 Difference]: Start difference. First operand has 158 places, 117 transitions, 906 flow. Second operand 11 states and 223 transitions. [2024-06-14 11:20:30,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 148 transitions, 1390 flow [2024-06-14 11:20:30,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 148 transitions, 1312 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-14 11:20:30,803 INFO L231 Difference]: Finished difference. Result has 153 places, 114 transitions, 874 flow [2024-06-14 11:20:30,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=834, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=874, PETRI_PLACES=153, PETRI_TRANSITIONS=114} [2024-06-14 11:20:30,804 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 112 predicate places. [2024-06-14 11:20:30,804 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 114 transitions, 874 flow [2024-06-14 11:20:30,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:30,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:30,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:30,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 11:20:30,805 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:30,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:30,805 INFO L85 PathProgramCache]: Analyzing trace with hash -232150688, now seen corresponding path program 8 times [2024-06-14 11:20:30,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:30,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689991084] [2024-06-14 11:20:30,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:30,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:30,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:30,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:30,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:30,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689991084] [2024-06-14 11:20:30,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689991084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:30,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:30,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:30,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252102861] [2024-06-14 11:20:30,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:30,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:30,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:30,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:30,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:30,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:30,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 114 transitions, 874 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:30,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:30,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:30,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:31,156 INFO L124 PetriNetUnfolderBase]: 920/1577 cut-off events. [2024-06-14 11:20:31,157 INFO L125 PetriNetUnfolderBase]: For 44711/44712 co-relation queries the response was YES. [2024-06-14 11:20:31,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6446 conditions, 1577 events. 920/1577 cut-off events. For 44711/44712 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 8554 event pairs, 329 based on Foata normal form. 27/1600 useless extension candidates. Maximal degree in co-relation 6377. Up to 1268 conditions per place. [2024-06-14 11:20:31,166 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 87 selfloop transitions, 25 changer transitions 19/137 dead transitions. [2024-06-14 11:20:31,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 137 transitions, 1212 flow [2024-06-14 11:20:31,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:20:31,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:20:31,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-14 11:20:31,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975 [2024-06-14 11:20:31,168 INFO L175 Difference]: Start difference. First operand has 153 places, 114 transitions, 874 flow. Second operand 10 states and 199 transitions. [2024-06-14 11:20:31,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 137 transitions, 1212 flow [2024-06-14 11:20:31,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 137 transitions, 1149 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 11:20:31,224 INFO L231 Difference]: Finished difference. Result has 150 places, 108 transitions, 820 flow [2024-06-14 11:20:31,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=820, PETRI_PLACES=150, PETRI_TRANSITIONS=108} [2024-06-14 11:20:31,224 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2024-06-14 11:20:31,224 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 108 transitions, 820 flow [2024-06-14 11:20:31,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:31,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:31,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:31,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 11:20:31,226 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:31,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:31,226 INFO L85 PathProgramCache]: Analyzing trace with hash -2007476048, now seen corresponding path program 9 times [2024-06-14 11:20:31,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:31,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292916296] [2024-06-14 11:20:31,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:31,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:31,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:31,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:31,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:31,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292916296] [2024-06-14 11:20:31,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292916296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:31,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:31,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:31,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400492596] [2024-06-14 11:20:31,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:31,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:31,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:31,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:31,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:31,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:31,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 108 transitions, 820 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:31,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:31,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:31,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:31,661 INFO L124 PetriNetUnfolderBase]: 1088/1888 cut-off events. [2024-06-14 11:20:31,662 INFO L125 PetriNetUnfolderBase]: For 70272/70273 co-relation queries the response was YES. [2024-06-14 11:20:31,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8994 conditions, 1888 events. 1088/1888 cut-off events. For 70272/70273 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10751 event pairs, 329 based on Foata normal form. 19/1903 useless extension candidates. Maximal degree in co-relation 8926. Up to 1050 conditions per place. [2024-06-14 11:20:31,674 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 105 selfloop transitions, 29 changer transitions 15/155 dead transitions. [2024-06-14 11:20:31,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 155 transitions, 1448 flow [2024-06-14 11:20:31,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:20:31,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:20:31,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 249 transitions. [2024-06-14 11:20:31,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51875 [2024-06-14 11:20:31,675 INFO L175 Difference]: Start difference. First operand has 150 places, 108 transitions, 820 flow. Second operand 12 states and 249 transitions. [2024-06-14 11:20:31,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 155 transitions, 1448 flow [2024-06-14 11:20:31,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 155 transitions, 1374 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-14 11:20:31,777 INFO L231 Difference]: Finished difference. Result has 144 places, 106 transitions, 809 flow [2024-06-14 11:20:31,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=809, PETRI_PLACES=144, PETRI_TRANSITIONS=106} [2024-06-14 11:20:31,778 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-14 11:20:31,778 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 106 transitions, 809 flow [2024-06-14 11:20:31,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:31,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:31,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:31,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 11:20:31,779 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:31,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:31,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1073247804, now seen corresponding path program 10 times [2024-06-14 11:20:31,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:31,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414180182] [2024-06-14 11:20:31,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:31,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:31,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:31,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:31,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414180182] [2024-06-14 11:20:31,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414180182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:31,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:31,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:31,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001636972] [2024-06-14 11:20:31,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:31,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:31,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:31,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:31,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:31,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:31,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 106 transitions, 809 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:31,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:31,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:31,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:32,141 INFO L124 PetriNetUnfolderBase]: 956/1650 cut-off events. [2024-06-14 11:20:32,142 INFO L125 PetriNetUnfolderBase]: For 48772/48773 co-relation queries the response was YES. [2024-06-14 11:20:32,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7457 conditions, 1650 events. 956/1650 cut-off events. For 48772/48773 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9153 event pairs, 317 based on Foata normal form. 19/1665 useless extension candidates. Maximal degree in co-relation 7392. Up to 1050 conditions per place. [2024-06-14 11:20:32,151 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 89 selfloop transitions, 26 changer transitions 18/139 dead transitions. [2024-06-14 11:20:32,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 139 transitions, 1267 flow [2024-06-14 11:20:32,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:20:32,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:20:32,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-14 11:20:32,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175 [2024-06-14 11:20:32,152 INFO L175 Difference]: Start difference. First operand has 144 places, 106 transitions, 809 flow. Second operand 10 states and 207 transitions. [2024-06-14 11:20:32,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 139 transitions, 1267 flow [2024-06-14 11:20:32,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 139 transitions, 1202 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-14 11:20:32,200 INFO L231 Difference]: Finished difference. Result has 141 places, 103 transitions, 785 flow [2024-06-14 11:20:32,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=785, PETRI_PLACES=141, PETRI_TRANSITIONS=103} [2024-06-14 11:20:32,201 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-06-14 11:20:32,201 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 103 transitions, 785 flow [2024-06-14 11:20:32,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:32,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:32,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:32,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 11:20:32,202 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:32,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:32,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1063070814, now seen corresponding path program 11 times [2024-06-14 11:20:32,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:32,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656357413] [2024-06-14 11:20:32,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:32,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:32,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:32,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:32,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:32,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656357413] [2024-06-14 11:20:32,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656357413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:32,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:32,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:32,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79746469] [2024-06-14 11:20:32,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:32,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:32,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:32,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:32,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:32,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:32,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 103 transitions, 785 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 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) [2024-06-14 11:20:32,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:32,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:32,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:32,476 INFO L124 PetriNetUnfolderBase]: 1093/1886 cut-off events. [2024-06-14 11:20:32,477 INFO L125 PetriNetUnfolderBase]: For 61573/61573 co-relation queries the response was YES. [2024-06-14 11:20:32,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8975 conditions, 1886 events. 1093/1886 cut-off events. For 61573/61573 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 10948 event pairs, 316 based on Foata normal form. 18/1899 useless extension candidates. Maximal degree in co-relation 8911. Up to 849 conditions per place. [2024-06-14 11:20:32,488 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 78 selfloop transitions, 27 changer transitions 22/133 dead transitions. [2024-06-14 11:20:32,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 133 transitions, 1236 flow [2024-06-14 11:20:32,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:32,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:32,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-14 11:20:32,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-14 11:20:32,489 INFO L175 Difference]: Start difference. First operand has 141 places, 103 transitions, 785 flow. Second operand 8 states and 172 transitions. [2024-06-14 11:20:32,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 133 transitions, 1236 flow [2024-06-14 11:20:32,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 133 transitions, 1172 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-14 11:20:32,542 INFO L231 Difference]: Finished difference. Result has 134 places, 98 transitions, 747 flow [2024-06-14 11:20:32,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=747, PETRI_PLACES=134, PETRI_TRANSITIONS=98} [2024-06-14 11:20:32,542 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 93 predicate places. [2024-06-14 11:20:32,542 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 98 transitions, 747 flow [2024-06-14 11:20:32,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 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) [2024-06-14 11:20:32,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:32,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:32,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 11:20:32,543 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:32,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:32,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1729188270, now seen corresponding path program 12 times [2024-06-14 11:20:32,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:32,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866680018] [2024-06-14 11:20:32,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:32,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:32,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:32,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:32,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:32,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866680018] [2024-06-14 11:20:32,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866680018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:32,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:32,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:32,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114494138] [2024-06-14 11:20:32,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:32,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:32,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:32,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:32,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:32,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:32,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 98 transitions, 747 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:32,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:32,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:32,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:32,855 INFO L124 PetriNetUnfolderBase]: 951/1623 cut-off events. [2024-06-14 11:20:32,855 INFO L125 PetriNetUnfolderBase]: For 46485/46485 co-relation queries the response was YES. [2024-06-14 11:20:32,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7275 conditions, 1623 events. 951/1623 cut-off events. For 46485/46485 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 9028 event pairs, 396 based on Foata normal form. 26/1647 useless extension candidates. Maximal degree in co-relation 7213. Up to 1337 conditions per place. [2024-06-14 11:20:32,865 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 71 selfloop transitions, 23 changer transitions 12/112 dead transitions. [2024-06-14 11:20:32,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 112 transitions, 1011 flow [2024-06-14 11:20:32,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:20:32,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:20:32,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-14 11:20:32,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725 [2024-06-14 11:20:32,866 INFO L175 Difference]: Start difference. First operand has 134 places, 98 transitions, 747 flow. Second operand 10 states and 189 transitions. [2024-06-14 11:20:32,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 112 transitions, 1011 flow [2024-06-14 11:20:32,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 112 transitions, 944 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-14 11:20:32,895 INFO L231 Difference]: Finished difference. Result has 127 places, 94 transitions, 701 flow [2024-06-14 11:20:32,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=701, PETRI_PLACES=127, PETRI_TRANSITIONS=94} [2024-06-14 11:20:32,896 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 86 predicate places. [2024-06-14 11:20:32,896 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 94 transitions, 701 flow [2024-06-14 11:20:32,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:32,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:32,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:32,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 11:20:32,896 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:32,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:32,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1784824960, now seen corresponding path program 6 times [2024-06-14 11:20:32,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:32,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672602632] [2024-06-14 11:20:32,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:32,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:32,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:32,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:32,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:32,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672602632] [2024-06-14 11:20:32,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672602632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:32,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:32,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:32,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523680188] [2024-06-14 11:20:32,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:32,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:32,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:32,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:32,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:33,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:33,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 94 transitions, 701 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:33,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:33,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:33,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:33,179 INFO L124 PetriNetUnfolderBase]: 990/1694 cut-off events. [2024-06-14 11:20:33,179 INFO L125 PetriNetUnfolderBase]: For 43451/43451 co-relation queries the response was YES. [2024-06-14 11:20:33,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7884 conditions, 1694 events. 990/1694 cut-off events. For 43451/43451 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 9582 event pairs, 302 based on Foata normal form. 18/1710 useless extension candidates. Maximal degree in co-relation 7827. Up to 826 conditions per place. [2024-06-14 11:20:33,188 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 80 selfloop transitions, 29 changer transitions 8/123 dead transitions. [2024-06-14 11:20:33,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 123 transitions, 1176 flow [2024-06-14 11:20:33,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:20:33,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:20:33,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-14 11:20:33,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49318181818181817 [2024-06-14 11:20:33,189 INFO L175 Difference]: Start difference. First operand has 127 places, 94 transitions, 701 flow. Second operand 11 states and 217 transitions. [2024-06-14 11:20:33,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 123 transitions, 1176 flow [2024-06-14 11:20:33,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 123 transitions, 1118 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-14 11:20:33,219 INFO L231 Difference]: Finished difference. Result has 127 places, 93 transitions, 721 flow [2024-06-14 11:20:33,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=721, PETRI_PLACES=127, PETRI_TRANSITIONS=93} [2024-06-14 11:20:33,219 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 86 predicate places. [2024-06-14 11:20:33,219 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 93 transitions, 721 flow [2024-06-14 11:20:33,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:33,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:33,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:33,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 11:20:33,220 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:33,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:33,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1779266350, now seen corresponding path program 7 times [2024-06-14 11:20:33,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:33,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678844982] [2024-06-14 11:20:33,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:33,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:33,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:33,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:33,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:33,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678844982] [2024-06-14 11:20:33,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678844982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:33,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:33,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:33,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038220343] [2024-06-14 11:20:33,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:33,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:33,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:33,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:33,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:33,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:33,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 93 transitions, 721 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:33,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:33,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:33,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:33,623 INFO L124 PetriNetUnfolderBase]: 1067/1835 cut-off events. [2024-06-14 11:20:33,624 INFO L125 PetriNetUnfolderBase]: For 50833/50833 co-relation queries the response was YES. [2024-06-14 11:20:33,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8868 conditions, 1835 events. 1067/1835 cut-off events. For 50833/50833 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 10659 event pairs, 485 based on Foata normal form. 24/1857 useless extension candidates. Maximal degree in co-relation 8811. Up to 1299 conditions per place. [2024-06-14 11:20:33,633 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 76 selfloop transitions, 20 changer transitions 12/114 dead transitions. [2024-06-14 11:20:33,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 114 transitions, 1083 flow [2024-06-14 11:20:33,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:20:33,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:20:33,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-14 11:20:33,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4825 [2024-06-14 11:20:33,634 INFO L175 Difference]: Start difference. First operand has 127 places, 93 transitions, 721 flow. Second operand 10 states and 193 transitions. [2024-06-14 11:20:33,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 114 transitions, 1083 flow [2024-06-14 11:20:33,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 114 transitions, 1029 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-14 11:20:33,667 INFO L231 Difference]: Finished difference. Result has 125 places, 89 transitions, 673 flow [2024-06-14 11:20:33,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=673, PETRI_PLACES=125, PETRI_TRANSITIONS=89} [2024-06-14 11:20:33,668 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 84 predicate places. [2024-06-14 11:20:33,668 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 89 transitions, 673 flow [2024-06-14 11:20:33,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:33,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:33,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:33,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 11:20:33,669 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:33,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:33,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1784830540, now seen corresponding path program 8 times [2024-06-14 11:20:33,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:33,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133239288] [2024-06-14 11:20:33,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:33,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:33,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:33,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133239288] [2024-06-14 11:20:33,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133239288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:33,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:33,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:33,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397167034] [2024-06-14 11:20:33,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:33,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:33,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:33,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:33,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:33,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:33,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 89 transitions, 673 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:33,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:33,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:33,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:34,026 INFO L124 PetriNetUnfolderBase]: 933/1601 cut-off events. [2024-06-14 11:20:34,027 INFO L125 PetriNetUnfolderBase]: For 40809/40809 co-relation queries the response was YES. [2024-06-14 11:20:34,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7515 conditions, 1601 events. 933/1601 cut-off events. For 40809/40809 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 8983 event pairs, 296 based on Foata normal form. 18/1617 useless extension candidates. Maximal degree in co-relation 7459. Up to 826 conditions per place. [2024-06-14 11:20:34,035 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 78 selfloop transitions, 23 changer transitions 9/116 dead transitions. [2024-06-14 11:20:34,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 116 transitions, 1123 flow [2024-06-14 11:20:34,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:20:34,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:20:34,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-14 11:20:34,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975 [2024-06-14 11:20:34,036 INFO L175 Difference]: Start difference. First operand has 125 places, 89 transitions, 673 flow. Second operand 10 states and 199 transitions. [2024-06-14 11:20:34,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 116 transitions, 1123 flow [2024-06-14 11:20:34,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 116 transitions, 1068 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-14 11:20:34,059 INFO L231 Difference]: Finished difference. Result has 122 places, 86 transitions, 652 flow [2024-06-14 11:20:34,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=652, PETRI_PLACES=122, PETRI_TRANSITIONS=86} [2024-06-14 11:20:34,059 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-14 11:20:34,059 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 86 transitions, 652 flow [2024-06-14 11:20:34,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:34,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:34,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:34,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 11:20:34,060 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:34,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:34,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1773545920, now seen corresponding path program 9 times [2024-06-14 11:20:34,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:34,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863586938] [2024-06-14 11:20:34,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:34,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:34,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:34,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:34,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:34,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863586938] [2024-06-14 11:20:34,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863586938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:34,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:34,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:34,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770890969] [2024-06-14 11:20:34,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:34,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:34,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:34,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:34,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:34,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:34,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 86 transitions, 652 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:34,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:34,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:34,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:34,379 INFO L124 PetriNetUnfolderBase]: 808/1384 cut-off events. [2024-06-14 11:20:34,379 INFO L125 PetriNetUnfolderBase]: For 29255/29255 co-relation queries the response was YES. [2024-06-14 11:20:34,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6051 conditions, 1384 events. 808/1384 cut-off events. For 29255/29255 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7433 event pairs, 359 based on Foata normal form. 26/1408 useless extension candidates. Maximal degree in co-relation 5997. Up to 1122 conditions per place. [2024-06-14 11:20:34,386 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 65 selfloop transitions, 15 changer transitions 12/98 dead transitions. [2024-06-14 11:20:34,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 98 transitions, 884 flow [2024-06-14 11:20:34,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:34,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:34,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 11:20:34,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48125 [2024-06-14 11:20:34,387 INFO L175 Difference]: Start difference. First operand has 122 places, 86 transitions, 652 flow. Second operand 8 states and 154 transitions. [2024-06-14 11:20:34,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 98 transitions, 884 flow [2024-06-14 11:20:34,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 98 transitions, 807 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-14 11:20:34,406 INFO L231 Difference]: Finished difference. Result has 118 places, 82 transitions, 576 flow [2024-06-14 11:20:34,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=576, PETRI_PLACES=118, PETRI_TRANSITIONS=82} [2024-06-14 11:20:34,407 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 77 predicate places. [2024-06-14 11:20:34,407 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 82 transitions, 576 flow [2024-06-14 11:20:34,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:34,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:34,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:34,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 11:20:34,408 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:34,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:34,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1773725410, now seen corresponding path program 10 times [2024-06-14 11:20:34,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:34,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054074840] [2024-06-14 11:20:34,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:34,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:34,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:34,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:34,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:34,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054074840] [2024-06-14 11:20:34,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054074840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:34,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:34,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:34,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712115386] [2024-06-14 11:20:34,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:34,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:34,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:34,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:34,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:34,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:34,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 82 transitions, 576 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:34,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:34,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:34,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:34,727 INFO L124 PetriNetUnfolderBase]: 679/1173 cut-off events. [2024-06-14 11:20:34,727 INFO L125 PetriNetUnfolderBase]: For 19489/19489 co-relation queries the response was YES. [2024-06-14 11:20:34,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4604 conditions, 1173 events. 679/1173 cut-off events. For 19489/19489 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6092 event pairs, 219 based on Foata normal form. 24/1195 useless extension candidates. Maximal degree in co-relation 4551. Up to 856 conditions per place. [2024-06-14 11:20:34,733 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 67 selfloop transitions, 12 changer transitions 13/98 dead transitions. [2024-06-14 11:20:34,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 98 transitions, 832 flow [2024-06-14 11:20:34,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:34,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:34,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 11:20:34,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-06-14 11:20:34,735 INFO L175 Difference]: Start difference. First operand has 118 places, 82 transitions, 576 flow. Second operand 8 states and 156 transitions. [2024-06-14 11:20:34,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 98 transitions, 832 flow [2024-06-14 11:20:34,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 98 transitions, 798 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 11:20:34,750 INFO L231 Difference]: Finished difference. Result has 115 places, 76 transitions, 521 flow [2024-06-14 11:20:34,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=521, PETRI_PLACES=115, PETRI_TRANSITIONS=76} [2024-06-14 11:20:34,750 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 74 predicate places. [2024-06-14 11:20:34,750 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 76 transitions, 521 flow [2024-06-14 11:20:34,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:34,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:34,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:34,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 11:20:34,751 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:34,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:34,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1712643742, now seen corresponding path program 11 times [2024-06-14 11:20:34,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:34,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629104019] [2024-06-14 11:20:34,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:34,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:34,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:34,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:34,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:34,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629104019] [2024-06-14 11:20:34,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629104019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:34,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:34,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:34,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167861033] [2024-06-14 11:20:34,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:34,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:34,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:34,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:34,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:34,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:34,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 76 transitions, 521 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 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) [2024-06-14 11:20:34,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:34,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:34,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:35,048 INFO L124 PetriNetUnfolderBase]: 744/1300 cut-off events. [2024-06-14 11:20:35,049 INFO L125 PetriNetUnfolderBase]: For 22012/22012 co-relation queries the response was YES. [2024-06-14 11:20:35,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5317 conditions, 1300 events. 744/1300 cut-off events. For 22012/22012 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6954 event pairs, 91 based on Foata normal form. 18/1314 useless extension candidates. Maximal degree in co-relation 5265. Up to 698 conditions per place. [2024-06-14 11:20:35,056 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 67 selfloop transitions, 16 changer transitions 13/102 dead transitions. [2024-06-14 11:20:35,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 102 transitions, 877 flow [2024-06-14 11:20:35,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:35,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:35,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-14 11:20:35,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-06-14 11:20:35,057 INFO L175 Difference]: Start difference. First operand has 115 places, 76 transitions, 521 flow. Second operand 8 states and 165 transitions. [2024-06-14 11:20:35,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 102 transitions, 877 flow [2024-06-14 11:20:35,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 102 transitions, 832 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-14 11:20:35,076 INFO L231 Difference]: Finished difference. Result has 110 places, 74 transitions, 501 flow [2024-06-14 11:20:35,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=501, PETRI_PLACES=110, PETRI_TRANSITIONS=74} [2024-06-14 11:20:35,076 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2024-06-14 11:20:35,077 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 74 transitions, 501 flow [2024-06-14 11:20:35,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 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) [2024-06-14 11:20:35,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:35,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:35,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 11:20:35,077 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:35,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:35,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1685045522, now seen corresponding path program 12 times [2024-06-14 11:20:35,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:35,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394908573] [2024-06-14 11:20:35,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:35,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:35,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:35,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:35,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394908573] [2024-06-14 11:20:35,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394908573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:35,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:35,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:35,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615546135] [2024-06-14 11:20:35,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:35,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:35,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:35,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:35,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:35,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:35,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 74 transitions, 501 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:35,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:35,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:35,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:35,438 INFO L124 PetriNetUnfolderBase]: 700/1226 cut-off events. [2024-06-14 11:20:35,438 INFO L125 PetriNetUnfolderBase]: For 22001/22001 co-relation queries the response was YES. [2024-06-14 11:20:35,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5126 conditions, 1226 events. 700/1226 cut-off events. For 22001/22001 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 6520 event pairs, 64 based on Foata normal form. 18/1242 useless extension candidates. Maximal degree in co-relation 5075. Up to 698 conditions per place. [2024-06-14 11:20:35,445 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 67 selfloop transitions, 19 changer transitions 8/100 dead transitions. [2024-06-14 11:20:35,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 100 transitions, 850 flow [2024-06-14 11:20:35,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:20:35,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:20:35,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-14 11:20:35,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 11:20:35,446 INFO L175 Difference]: Start difference. First operand has 110 places, 74 transitions, 501 flow. Second operand 9 states and 180 transitions. [2024-06-14 11:20:35,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 100 transitions, 850 flow [2024-06-14 11:20:35,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 100 transitions, 814 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 11:20:35,461 INFO L231 Difference]: Finished difference. Result has 111 places, 73 transitions, 503 flow [2024-06-14 11:20:35,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=503, PETRI_PLACES=111, PETRI_TRANSITIONS=73} [2024-06-14 11:20:35,464 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 70 predicate places. [2024-06-14 11:20:35,465 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 73 transitions, 503 flow [2024-06-14 11:20:35,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:35,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:35,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:35,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 11:20:35,465 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:35,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:35,465 INFO L85 PathProgramCache]: Analyzing trace with hash 985181480, now seen corresponding path program 13 times [2024-06-14 11:20:35,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:35,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000625720] [2024-06-14 11:20:35,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:35,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:35,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:35,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:35,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:35,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000625720] [2024-06-14 11:20:35,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000625720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:35,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:35,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:35,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529184457] [2024-06-14 11:20:35,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:35,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:35,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:35,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:35,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:35,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:35,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 73 transitions, 503 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:35,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:35,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:35,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:35,730 INFO L124 PetriNetUnfolderBase]: 595/1039 cut-off events. [2024-06-14 11:20:35,730 INFO L125 PetriNetUnfolderBase]: For 16151/16151 co-relation queries the response was YES. [2024-06-14 11:20:35,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4146 conditions, 1039 events. 595/1039 cut-off events. For 16151/16151 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5240 event pairs, 52 based on Foata normal form. 18/1055 useless extension candidates. Maximal degree in co-relation 4095. Up to 698 conditions per place. [2024-06-14 11:20:35,735 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 58 selfloop transitions, 16 changer transitions 13/93 dead transitions. [2024-06-14 11:20:35,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 93 transitions, 757 flow [2024-06-14 11:20:35,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:20:35,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:20:35,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-14 11:20:35,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2024-06-14 11:20:35,736 INFO L175 Difference]: Start difference. First operand has 111 places, 73 transitions, 503 flow. Second operand 9 states and 175 transitions. [2024-06-14 11:20:35,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 93 transitions, 757 flow [2024-06-14 11:20:35,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 93 transitions, 715 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 11:20:35,750 INFO L231 Difference]: Finished difference. Result has 111 places, 66 transitions, 444 flow [2024-06-14 11:20:35,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=444, PETRI_PLACES=111, PETRI_TRANSITIONS=66} [2024-06-14 11:20:35,750 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 70 predicate places. [2024-06-14 11:20:35,751 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 66 transitions, 444 flow [2024-06-14 11:20:35,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:35,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:35,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:35,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 11:20:35,751 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:35,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:35,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1235992666, now seen corresponding path program 14 times [2024-06-14 11:20:35,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:35,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113068301] [2024-06-14 11:20:35,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:35,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:35,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:35,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:35,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113068301] [2024-06-14 11:20:35,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113068301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:35,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:35,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:35,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054386421] [2024-06-14 11:20:35,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:35,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:35,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:35,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:35,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:35,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:35,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 66 transitions, 444 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:35,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:35,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:35,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:36,017 INFO L124 PetriNetUnfolderBase]: 659/1149 cut-off events. [2024-06-14 11:20:36,017 INFO L125 PetriNetUnfolderBase]: For 23989/23989 co-relation queries the response was YES. [2024-06-14 11:20:36,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4883 conditions, 1149 events. 659/1149 cut-off events. For 23989/23989 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6067 event pairs, 272 based on Foata normal form. 24/1172 useless extension candidates. Maximal degree in co-relation 4833. Up to 576 conditions per place. [2024-06-14 11:20:36,022 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 56 selfloop transitions, 12 changer transitions 16/90 dead transitions. [2024-06-14 11:20:36,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 90 transitions, 766 flow [2024-06-14 11:20:36,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:20:36,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:20:36,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-14 11:20:36,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-06-14 11:20:36,023 INFO L175 Difference]: Start difference. First operand has 111 places, 66 transitions, 444 flow. Second operand 10 states and 192 transitions. [2024-06-14 11:20:36,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 90 transitions, 766 flow [2024-06-14 11:20:36,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 90 transitions, 687 flow, removed 2 selfloop flow, removed 18 redundant places. [2024-06-14 11:20:36,036 INFO L231 Difference]: Finished difference. Result has 100 places, 62 transitions, 367 flow [2024-06-14 11:20:36,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=367, PETRI_PLACES=100, PETRI_TRANSITIONS=62} [2024-06-14 11:20:36,037 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 59 predicate places. [2024-06-14 11:20:36,037 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 62 transitions, 367 flow [2024-06-14 11:20:36,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:36,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:36,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:36,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 11:20:36,037 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:36,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:36,038 INFO L85 PathProgramCache]: Analyzing trace with hash -2015711204, now seen corresponding path program 15 times [2024-06-14 11:20:36,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:36,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854724357] [2024-06-14 11:20:36,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:36,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:36,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:36,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:36,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:36,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854724357] [2024-06-14 11:20:36,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854724357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:36,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:36,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:36,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141543511] [2024-06-14 11:20:36,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:36,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:36,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:36,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:36,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:36,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:36,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 62 transitions, 367 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:36,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:36,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:36,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:36,310 INFO L124 PetriNetUnfolderBase]: 599/1041 cut-off events. [2024-06-14 11:20:36,310 INFO L125 PetriNetUnfolderBase]: For 23633/23633 co-relation queries the response was YES. [2024-06-14 11:20:36,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4410 conditions, 1041 events. 599/1041 cut-off events. For 23633/23633 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5314 event pairs, 256 based on Foata normal form. 24/1064 useless extension candidates. Maximal degree in co-relation 4365. Up to 576 conditions per place. [2024-06-14 11:20:36,315 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 55 selfloop transitions, 11 changer transitions 10/82 dead transitions. [2024-06-14 11:20:36,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 82 transitions, 649 flow [2024-06-14 11:20:36,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:20:36,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:20:36,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-14 11:20:36,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465 [2024-06-14 11:20:36,316 INFO L175 Difference]: Start difference. First operand has 100 places, 62 transitions, 367 flow. Second operand 10 states and 186 transitions. [2024-06-14 11:20:36,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 82 transitions, 649 flow [2024-06-14 11:20:36,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 82 transitions, 618 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-14 11:20:36,325 INFO L231 Difference]: Finished difference. Result has 97 places, 59 transitions, 345 flow [2024-06-14 11:20:36,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=345, PETRI_PLACES=97, PETRI_TRANSITIONS=59} [2024-06-14 11:20:36,325 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 56 predicate places. [2024-06-14 11:20:36,325 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 59 transitions, 345 flow [2024-06-14 11:20:36,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:36,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:36,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:36,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 11:20:36,326 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:36,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:36,326 INFO L85 PathProgramCache]: Analyzing trace with hash -601525390, now seen corresponding path program 16 times [2024-06-14 11:20:36,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:36,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739230429] [2024-06-14 11:20:36,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:36,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:36,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:36,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:36,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739230429] [2024-06-14 11:20:36,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739230429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:36,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:36,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:36,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404454541] [2024-06-14 11:20:36,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:36,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:36,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:36,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:36,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:36,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:36,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 59 transitions, 345 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:36,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:36,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:36,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:36,634 INFO L124 PetriNetUnfolderBase]: 448/784 cut-off events. [2024-06-14 11:20:36,634 INFO L125 PetriNetUnfolderBase]: For 13285/13285 co-relation queries the response was YES. [2024-06-14 11:20:36,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2896 conditions, 784 events. 448/784 cut-off events. For 13285/13285 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3699 event pairs, 211 based on Foata normal form. 26/809 useless extension candidates. Maximal degree in co-relation 2853. Up to 576 conditions per place. [2024-06-14 11:20:36,637 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 44 selfloop transitions, 5 changer transitions 16/71 dead transitions. [2024-06-14 11:20:36,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 71 transitions, 515 flow [2024-06-14 11:20:36,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:20:36,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:20:36,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 11:20:36,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-14 11:20:36,638 INFO L175 Difference]: Start difference. First operand has 97 places, 59 transitions, 345 flow. Second operand 9 states and 162 transitions. [2024-06-14 11:20:36,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 71 transitions, 515 flow [2024-06-14 11:20:36,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 71 transitions, 492 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 11:20:36,645 INFO L231 Difference]: Finished difference. Result has 95 places, 52 transitions, 282 flow [2024-06-14 11:20:36,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=282, PETRI_PLACES=95, PETRI_TRANSITIONS=52} [2024-06-14 11:20:36,645 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-06-14 11:20:36,645 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 52 transitions, 282 flow [2024-06-14 11:20:36,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:36,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:36,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:36,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 11:20:36,646 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:36,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:36,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1647263804, now seen corresponding path program 17 times [2024-06-14 11:20:36,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:36,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656814991] [2024-06-14 11:20:36,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:36,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:36,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:36,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:36,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656814991] [2024-06-14 11:20:36,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656814991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:36,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:36,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:36,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912797929] [2024-06-14 11:20:36,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:36,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:36,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:36,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:36,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:36,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:36,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 52 transitions, 282 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:36,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:36,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:36,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:36,917 INFO L124 PetriNetUnfolderBase]: 492/880 cut-off events. [2024-06-14 11:20:36,917 INFO L125 PetriNetUnfolderBase]: For 14502/14502 co-relation queries the response was YES. [2024-06-14 11:20:36,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3443 conditions, 880 events. 492/880 cut-off events. For 14502/14502 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4364 event pairs, 161 based on Foata normal form. 18/897 useless extension candidates. Maximal degree in co-relation 3401. Up to 422 conditions per place. [2024-06-14 11:20:36,922 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 50 selfloop transitions, 7 changer transitions 13/76 dead transitions. [2024-06-14 11:20:36,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 76 transitions, 562 flow [2024-06-14 11:20:36,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:20:36,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:20:36,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 11:20:36,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48055555555555557 [2024-06-14 11:20:36,923 INFO L175 Difference]: Start difference. First operand has 95 places, 52 transitions, 282 flow. Second operand 9 states and 173 transitions. [2024-06-14 11:20:36,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 76 transitions, 562 flow [2024-06-14 11:20:36,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 76 transitions, 515 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-14 11:20:36,931 INFO L231 Difference]: Finished difference. Result has 85 places, 49 transitions, 256 flow [2024-06-14 11:20:36,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=256, PETRI_PLACES=85, PETRI_TRANSITIONS=49} [2024-06-14 11:20:36,932 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 44 predicate places. [2024-06-14 11:20:36,932 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 49 transitions, 256 flow [2024-06-14 11:20:36,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:36,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:36,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:36,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 11:20:36,932 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:36,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:36,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1713524148, now seen corresponding path program 18 times [2024-06-14 11:20:36,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:36,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865678414] [2024-06-14 11:20:36,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:36,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:37,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:37,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:37,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865678414] [2024-06-14 11:20:37,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865678414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:37,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:37,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:37,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938067598] [2024-06-14 11:20:37,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:37,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:37,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:37,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:37,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:37,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:37,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 49 transitions, 256 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:37,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:37,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:37,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:37,230 INFO L124 PetriNetUnfolderBase]: 448/808 cut-off events. [2024-06-14 11:20:37,231 INFO L125 PetriNetUnfolderBase]: For 10606/10606 co-relation queries the response was YES. [2024-06-14 11:20:37,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2992 conditions, 808 events. 448/808 cut-off events. For 10606/10606 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3941 event pairs, 153 based on Foata normal form. 18/825 useless extension candidates. Maximal degree in co-relation 2955. Up to 422 conditions per place. [2024-06-14 11:20:37,233 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 51 selfloop transitions, 8 changer transitions 12/77 dead transitions. [2024-06-14 11:20:37,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 77 transitions, 528 flow [2024-06-14 11:20:37,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:20:37,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:20:37,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-14 11:20:37,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590909090909091 [2024-06-14 11:20:37,235 INFO L175 Difference]: Start difference. First operand has 85 places, 49 transitions, 256 flow. Second operand 11 states and 202 transitions. [2024-06-14 11:20:37,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 77 transitions, 528 flow [2024-06-14 11:20:37,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 77 transitions, 504 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 11:20:37,239 INFO L231 Difference]: Finished difference. Result has 84 places, 47 transitions, 245 flow [2024-06-14 11:20:37,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=245, PETRI_PLACES=84, PETRI_TRANSITIONS=47} [2024-06-14 11:20:37,239 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-06-14 11:20:37,239 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 47 transitions, 245 flow [2024-06-14 11:20:37,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:37,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:37,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:37,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 11:20:37,240 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:37,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:37,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1713529728, now seen corresponding path program 19 times [2024-06-14 11:20:37,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:37,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982750179] [2024-06-14 11:20:37,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:37,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:37,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:37,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:37,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982750179] [2024-06-14 11:20:37,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982750179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:37,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:37,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:37,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322738854] [2024-06-14 11:20:37,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:37,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:37,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:37,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:37,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:37,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:37,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 47 transitions, 245 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:37,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:37,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:37,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:37,494 INFO L124 PetriNetUnfolderBase]: 343/621 cut-off events. [2024-06-14 11:20:37,494 INFO L125 PetriNetUnfolderBase]: For 5898/5898 co-relation queries the response was YES. [2024-06-14 11:20:37,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2110 conditions, 621 events. 343/621 cut-off events. For 5898/5898 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2776 event pairs, 141 based on Foata normal form. 18/638 useless extension candidates. Maximal degree in co-relation 2075. Up to 422 conditions per place. [2024-06-14 11:20:37,496 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 35 selfloop transitions, 3 changer transitions 20/64 dead transitions. [2024-06-14 11:20:37,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 64 transitions, 413 flow [2024-06-14 11:20:37,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:20:37,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:20:37,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 11:20:37,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-14 11:20:37,497 INFO L175 Difference]: Start difference. First operand has 84 places, 47 transitions, 245 flow. Second operand 9 states and 163 transitions. [2024-06-14 11:20:37,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 64 transitions, 413 flow [2024-06-14 11:20:37,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 64 transitions, 394 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 11:20:37,500 INFO L231 Difference]: Finished difference. Result has 81 places, 42 transitions, 205 flow [2024-06-14 11:20:37,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=205, PETRI_PLACES=81, PETRI_TRANSITIONS=42} [2024-06-14 11:20:37,500 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 40 predicate places. [2024-06-14 11:20:37,500 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 42 transitions, 205 flow [2024-06-14 11:20:37,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:37,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:37,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:37,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 11:20:37,501 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:37,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:37,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1356038226, now seen corresponding path program 20 times [2024-06-14 11:20:37,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:37,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748491474] [2024-06-14 11:20:37,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:37,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:37,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:37,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:37,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:37,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748491474] [2024-06-14 11:20:37,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748491474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:37,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:37,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:37,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941820550] [2024-06-14 11:20:37,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:37,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:37,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:37,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:37,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:37,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:37,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 42 transitions, 205 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 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) [2024-06-14 11:20:37,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:37,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:37,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:37,772 INFO L124 PetriNetUnfolderBase]: 393/710 cut-off events. [2024-06-14 11:20:37,772 INFO L125 PetriNetUnfolderBase]: For 7650/7650 co-relation queries the response was YES. [2024-06-14 11:20:37,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2574 conditions, 710 events. 393/710 cut-off events. For 7650/7650 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3372 event pairs, 71 based on Foata normal form. 18/726 useless extension candidates. Maximal degree in co-relation 2540. Up to 204 conditions per place. [2024-06-14 11:20:37,775 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 41 selfloop transitions, 12 changer transitions 13/72 dead transitions. [2024-06-14 11:20:37,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 72 transitions, 471 flow [2024-06-14 11:20:37,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:20:37,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:20:37,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-14 11:20:37,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-06-14 11:20:37,777 INFO L175 Difference]: Start difference. First operand has 81 places, 42 transitions, 205 flow. Second operand 10 states and 192 transitions. [2024-06-14 11:20:37,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 72 transitions, 471 flow [2024-06-14 11:20:37,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 72 transitions, 447 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-14 11:20:37,780 INFO L231 Difference]: Finished difference. Result has 72 places, 39 transitions, 198 flow [2024-06-14 11:20:37,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=198, PETRI_PLACES=72, PETRI_TRANSITIONS=39} [2024-06-14 11:20:37,781 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-14 11:20:37,781 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 39 transitions, 198 flow [2024-06-14 11:20:37,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 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) [2024-06-14 11:20:37,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:37,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:37,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 11:20:37,781 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:37,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:37,782 INFO L85 PathProgramCache]: Analyzing trace with hash 2121279086, now seen corresponding path program 21 times [2024-06-14 11:20:37,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:37,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948536331] [2024-06-14 11:20:37,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:37,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:37,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:37,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:37,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948536331] [2024-06-14 11:20:37,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948536331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:37,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:37,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:37,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537021561] [2024-06-14 11:20:37,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:37,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:37,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:37,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:37,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:37,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:37,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 39 transitions, 198 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:37,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:37,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:37,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:38,071 INFO L124 PetriNetUnfolderBase]: 450/818 cut-off events. [2024-06-14 11:20:38,072 INFO L125 PetriNetUnfolderBase]: For 7104/7104 co-relation queries the response was YES. [2024-06-14 11:20:38,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3040 conditions, 818 events. 450/818 cut-off events. For 7104/7104 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4161 event pairs, 118 based on Foata normal form. 18/835 useless extension candidates. Maximal degree in co-relation 3009. Up to 387 conditions per place. [2024-06-14 11:20:38,075 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 43 selfloop transitions, 12 changer transitions 8/69 dead transitions. [2024-06-14 11:20:38,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 69 transitions, 451 flow [2024-06-14 11:20:38,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:20:38,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:20:38,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-14 11:20:38,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-14 11:20:38,076 INFO L175 Difference]: Start difference. First operand has 72 places, 39 transitions, 198 flow. Second operand 11 states and 206 transitions. [2024-06-14 11:20:38,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 69 transitions, 451 flow [2024-06-14 11:20:38,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 69 transitions, 409 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-14 11:20:38,080 INFO L231 Difference]: Finished difference. Result has 70 places, 38 transitions, 191 flow [2024-06-14 11:20:38,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=191, PETRI_PLACES=70, PETRI_TRANSITIONS=38} [2024-06-14 11:20:38,080 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 29 predicate places. [2024-06-14 11:20:38,080 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 38 transitions, 191 flow [2024-06-14 11:20:38,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:38,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:38,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:38,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 11:20:38,081 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:38,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:38,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1999593288, now seen corresponding path program 22 times [2024-06-14 11:20:38,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:38,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914804808] [2024-06-14 11:20:38,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:38,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:38,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:38,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:38,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:38,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914804808] [2024-06-14 11:20:38,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914804808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:38,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:38,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:38,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965620950] [2024-06-14 11:20:38,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:38,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:38,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:38,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:38,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:38,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:38,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 38 transitions, 191 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:38,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:38,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:38,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:38,303 INFO L124 PetriNetUnfolderBase]: 345/631 cut-off events. [2024-06-14 11:20:38,303 INFO L125 PetriNetUnfolderBase]: For 3964/3964 co-relation queries the response was YES. [2024-06-14 11:20:38,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2194 conditions, 631 events. 345/631 cut-off events. For 3964/3964 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2969 event pairs, 106 based on Foata normal form. 18/648 useless extension candidates. Maximal degree in co-relation 2165. Up to 387 conditions per place. [2024-06-14 11:20:38,305 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 30 selfloop transitions, 8 changer transitions 16/60 dead transitions. [2024-06-14 11:20:38,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 60 transitions, 365 flow [2024-06-14 11:20:38,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:20:38,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:20:38,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-14 11:20:38,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-14 11:20:38,306 INFO L175 Difference]: Start difference. First operand has 70 places, 38 transitions, 191 flow. Second operand 10 states and 184 transitions. [2024-06-14 11:20:38,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 60 transitions, 365 flow [2024-06-14 11:20:38,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 60 transitions, 337 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 11:20:38,308 INFO L231 Difference]: Finished difference. Result has 69 places, 34 transitions, 161 flow [2024-06-14 11:20:38,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=161, PETRI_PLACES=69, PETRI_TRANSITIONS=34} [2024-06-14 11:20:38,309 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 28 predicate places. [2024-06-14 11:20:38,309 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 34 transitions, 161 flow [2024-06-14 11:20:38,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:38,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:38,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:38,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 11:20:38,310 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:38,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:38,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1800297078, now seen corresponding path program 23 times [2024-06-14 11:20:38,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:38,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707037739] [2024-06-14 11:20:38,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:38,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:38,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:38,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:38,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707037739] [2024-06-14 11:20:38,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707037739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:38,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:38,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:38,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372875679] [2024-06-14 11:20:38,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:38,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:38,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:38,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:38,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:38,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:38,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 34 transitions, 161 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:38,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:38,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:38,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:38,512 INFO L124 PetriNetUnfolderBase]: 313/579 cut-off events. [2024-06-14 11:20:38,512 INFO L125 PetriNetUnfolderBase]: For 3830/3830 co-relation queries the response was YES. [2024-06-14 11:20:38,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1993 conditions, 579 events. 313/579 cut-off events. For 3830/3830 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2730 event pairs, 68 based on Foata normal form. 18/596 useless extension candidates. Maximal degree in co-relation 1965. Up to 204 conditions per place. [2024-06-14 11:20:38,515 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 37 selfloop transitions, 8 changer transitions 12/63 dead transitions. [2024-06-14 11:20:38,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 63 transitions, 385 flow [2024-06-14 11:20:38,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:20:38,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:20:38,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-14 11:20:38,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45681818181818185 [2024-06-14 11:20:38,516 INFO L175 Difference]: Start difference. First operand has 69 places, 34 transitions, 161 flow. Second operand 11 states and 201 transitions. [2024-06-14 11:20:38,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 63 transitions, 385 flow [2024-06-14 11:20:38,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 63 transitions, 361 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 11:20:38,517 INFO L231 Difference]: Finished difference. Result has 65 places, 32 transitions, 148 flow [2024-06-14 11:20:38,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=148, PETRI_PLACES=65, PETRI_TRANSITIONS=32} [2024-06-14 11:20:38,518 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2024-06-14 11:20:38,518 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 32 transitions, 148 flow [2024-06-14 11:20:38,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:38,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:38,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:38,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 11:20:38,518 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:38,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:38,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1020795598, now seen corresponding path program 24 times [2024-06-14 11:20:38,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:38,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163832829] [2024-06-14 11:20:38,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:38,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:38,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:38,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:38,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163832829] [2024-06-14 11:20:38,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163832829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:38,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:38,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:38,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859500496] [2024-06-14 11:20:38,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:38,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:38,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:38,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:38,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:38,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:38,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 32 transitions, 148 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:38,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:38,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:38,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:38,741 INFO L124 PetriNetUnfolderBase]: 208/396 cut-off events. [2024-06-14 11:20:38,741 INFO L125 PetriNetUnfolderBase]: For 2212/2212 co-relation queries the response was YES. [2024-06-14 11:20:38,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1280 conditions, 396 events. 208/396 cut-off events. For 2212/2212 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1614 event pairs, 12 based on Foata normal form. 18/413 useless extension candidates. Maximal degree in co-relation 1253. Up to 147 conditions per place. [2024-06-14 11:20:38,743 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 27 selfloop transitions, 6 changer transitions 13/52 dead transitions. [2024-06-14 11:20:38,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 52 transitions, 302 flow [2024-06-14 11:20:38,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:20:38,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:20:38,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-14 11:20:38,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2024-06-14 11:20:38,744 INFO L175 Difference]: Start difference. First operand has 65 places, 32 transitions, 148 flow. Second operand 10 states and 176 transitions. [2024-06-14 11:20:38,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 52 transitions, 302 flow [2024-06-14 11:20:38,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 52 transitions, 277 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-14 11:20:38,745 INFO L231 Difference]: Finished difference. Result has 62 places, 29 transitions, 124 flow [2024-06-14 11:20:38,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=124, PETRI_PLACES=62, PETRI_TRANSITIONS=29} [2024-06-14 11:20:38,746 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 21 predicate places. [2024-06-14 11:20:38,746 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 29 transitions, 124 flow [2024-06-14 11:20:38,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:38,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:38,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:38,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 11:20:38,746 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:38,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:38,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1562697246, now seen corresponding path program 25 times [2024-06-14 11:20:38,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:38,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581440921] [2024-06-14 11:20:38,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:38,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:38,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:38,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:38,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581440921] [2024-06-14 11:20:38,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581440921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:38,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:38,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:38,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890212868] [2024-06-14 11:20:38,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:38,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:38,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:38,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:38,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:38,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 11:20:38,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 29 transitions, 124 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:38,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:38,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 11:20:38,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:38,978 INFO L124 PetriNetUnfolderBase]: 83/177 cut-off events. [2024-06-14 11:20:38,978 INFO L125 PetriNetUnfolderBase]: For 886/886 co-relation queries the response was YES. [2024-06-14 11:20:38,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 508 conditions, 177 events. 83/177 cut-off events. For 886/886 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 513 event pairs, 0 based on Foata normal form. 18/194 useless extension candidates. Maximal degree in co-relation 494. Up to 96 conditions per place. [2024-06-14 11:20:38,979 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 0 selfloop transitions, 0 changer transitions 40/40 dead transitions. [2024-06-14 11:20:38,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 40 transitions, 202 flow [2024-06-14 11:20:38,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:20:38,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:20:38,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 11:20:38,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-14 11:20:38,980 INFO L175 Difference]: Start difference. First operand has 62 places, 29 transitions, 124 flow. Second operand 9 states and 152 transitions. [2024-06-14 11:20:38,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 40 transitions, 202 flow [2024-06-14 11:20:38,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 40 transitions, 177 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-14 11:20:38,981 INFO L231 Difference]: Finished difference. Result has 53 places, 0 transitions, 0 flow [2024-06-14 11:20:38,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=53, PETRI_TRANSITIONS=0} [2024-06-14 11:20:38,981 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2024-06-14 11:20:38,981 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 0 transitions, 0 flow [2024-06-14 11:20:38,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 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) [2024-06-14 11:20:38,984 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 6 remaining) [2024-06-14 11:20:38,984 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 6 remaining) [2024-06-14 11:20:38,987 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 6 remaining) [2024-06-14 11:20:38,988 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-06-14 11:20:38,988 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2024-06-14 11:20:38,988 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2024-06-14 11:20:38,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 11:20:38,988 INFO L445 BasicCegarLoop]: Path program histogram: [25, 15, 12, 9, 7, 7, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:38,992 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-14 11:20:38,992 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-14 11:20:38,996 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-14 11:20:38,996 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-14 11:20:38,997 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.06 11:20:38 BasicIcfg [2024-06-14 11:20:38,997 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-14 11:20:38,997 INFO L158 Benchmark]: Toolchain (without parser) took 85056.66ms. Allocated memory was 167.8MB in the beginning and 3.6GB in the end (delta: 3.4GB). Free memory was 105.8MB in the beginning and 1.8GB in the end (delta: -1.7GB). Peak memory consumption was 1.7GB. Max. memory is 16.1GB. [2024-06-14 11:20:38,997 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 167.8MB. Free memory is still 132.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-14 11:20:38,998 INFO L158 Benchmark]: Witness Parser took 0.14ms. Allocated memory is still 167.8MB. Free memory is still 109.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-14 11:20:38,998 INFO L158 Benchmark]: CACSL2BoogieTranslator took 520.00ms. Allocated memory is still 167.8MB. Free memory was 105.5MB in the beginning and 78.5MB in the end (delta: 27.0MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2024-06-14 11:20:38,998 INFO L158 Benchmark]: Boogie Procedure Inliner took 68.11ms. Allocated memory is still 167.8MB. Free memory was 78.5MB in the beginning and 76.1MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-14 11:20:38,999 INFO L158 Benchmark]: Boogie Preprocessor took 56.09ms. Allocated memory is still 167.8MB. Free memory was 76.1MB in the beginning and 74.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-14 11:20:38,999 INFO L158 Benchmark]: RCFGBuilder took 364.33ms. Allocated memory is still 167.8MB. Free memory was 74.0MB in the beginning and 48.1MB in the end (delta: 25.9MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-14 11:20:38,999 INFO L158 Benchmark]: TraceAbstraction took 84043.43ms. Allocated memory was 167.8MB in the beginning and 3.6GB in the end (delta: 3.4GB). Free memory was 47.1MB in the beginning and 1.8GB in the end (delta: -1.8GB). Peak memory consumption was 1.6GB. Max. memory is 16.1GB. [2024-06-14 11:20:39,000 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 167.8MB. Free memory is still 132.5MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.14ms. Allocated memory is still 167.8MB. Free memory is still 109.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 520.00ms. Allocated memory is still 167.8MB. Free memory was 105.5MB in the beginning and 78.5MB in the end (delta: 27.0MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 68.11ms. Allocated memory is still 167.8MB. Free memory was 78.5MB in the beginning and 76.1MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 56.09ms. Allocated memory is still 167.8MB. Free memory was 76.1MB in the beginning and 74.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 364.33ms. Allocated memory is still 167.8MB. Free memory was 74.0MB in the beginning and 48.1MB in the end (delta: 25.9MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 84043.43ms. Allocated memory was 167.8MB in the beginning and 3.6GB in the end (delta: 3.4GB). Free memory was 47.1MB in the beginning and 1.8GB in the end (delta: -1.8GB). Peak memory consumption was 1.6GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 776]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 778]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 779]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 64 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 83.9s, OverallIterations: 133, TraceHistogramMax: 1, PathProgramHistogramMax: 25, EmptinessCheckTime: 0.0s, AutomataDifference: 69.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9573 SdHoareTripleChecker+Valid, 15.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7908 mSDsluCounter, 2749 SdHoareTripleChecker+Invalid, 12.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1879 mSDsCounter, 1389 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 34206 IncrementalHoareTripleChecker+Invalid, 35595 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1389 mSolverCounterUnsat, 870 mSDtfsCounter, 34206 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 999 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 999 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 5.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2194occurred in iteration=62, InterpolantAutomatonStates: 1055, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 12.7s InterpolantComputationTime, 2571 NumberOfCodeBlocks, 2571 NumberOfCodeBlocksAsserted, 133 NumberOfCheckSat, 2438 ConstructedInterpolants, 0 QuantifiedInterpolants, 22772 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 133 InterpolantComputations, 133 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-14 11:20:39,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE