./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/thin002_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/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --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 11:38:37,944 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 11:38:38,014 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 11:38:38,019 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 11:38:38,020 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 11:38:38,043 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 11:38:38,044 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 11:38:38,045 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 11:38:38,045 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 11:38:38,048 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 11:38:38,049 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 11:38:38,049 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 11:38:38,050 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 11:38:38,051 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 11:38:38,051 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 11:38:38,051 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 11:38:38,051 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 11:38:38,051 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 11:38:38,052 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 11:38:38,052 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 11:38:38,052 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 11:38:38,052 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 11:38:38,052 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 11:38:38,053 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 11:38:38,053 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 11:38:38,053 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 11:38:38,053 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 11:38:38,053 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 11:38:38,054 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 11:38:38,054 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 11:38:38,055 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 11:38:38,055 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 11:38:38,055 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:38:38,055 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 11:38:38,055 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 11:38:38,056 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 11:38:38,056 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 11:38:38,056 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 11:38:38,056 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 11:38:38,056 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 11:38:38,056 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 11:38:38,057 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 11:38:38,057 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 11:38:38,057 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 11:38:38,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 11:38:38,318 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 11:38:38,320 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 11:38:38,321 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 11:38:38,321 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 11:38:38,322 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 11:38:39,393 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 11:38:39,571 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 11:38:39,581 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 11:38:39,598 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcfe0b360/79d125ab164d43a9874119806727c0a9/FLAGa56d569b6 [2024-06-14 11:38:39,609 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcfe0b360/79d125ab164d43a9874119806727c0a9 [2024-06-14 11:38:39,611 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 11:38:39,611 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 11:38:39,612 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-14 11:38:39,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 11:38:39,719 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 11:38:39,720 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 11:38:39,721 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 11:38:39,724 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 11:38:39,725 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:38:39" (1/2) ... [2024-06-14 11:38:39,726 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fe2f98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:38:39, skipping insertion in model container [2024-06-14 11:38:39,726 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:38:39" (1/2) ... [2024-06-14 11:38:39,728 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5c8a038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:38:39, skipping insertion in model container [2024-06-14 11:38:39,728 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:38:39" (2/2) ... [2024-06-14 11:38:39,729 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fe2f98 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:38:39, skipping insertion in model container [2024-06-14 11:38:39,730 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:38:39" (2/2) ... [2024-06-14 11:38:39,730 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 11:38:39,819 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 11:38:39,820 INFO L97 edCorrectnessWitness]: Location invariant before [L807-L807] ((((((((! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) [2024-06-14 11:38:39,821 INFO L97 edCorrectnessWitness]: Location invariant before [L808-L808] ((((((((! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) [2024-06-14 11:38:39,821 INFO L97 edCorrectnessWitness]: Location invariant before [L805-L805] ((((((((! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) [2024-06-14 11:38:39,821 INFO L97 edCorrectnessWitness]: Location invariant before [L803-L803] ((((((((! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) [2024-06-14 11:38:39,821 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 11:38:39,822 INFO L106 edCorrectnessWitness]: ghost_update [L801-L801] multithreaded = 1; [2024-06-14 11:38:39,872 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 11:38:40,140 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:38:40,147 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 11:38:40,275 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:38:40,319 INFO L206 MainTranslator]: Completed translation [2024-06-14 11:38:40,320 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:38:40 WrapperNode [2024-06-14 11:38:40,320 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 11:38:40,320 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 11:38:40,321 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 11:38:40,321 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 11:38:40,337 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 11:38:40" (1/1) ... [2024-06-14 11:38:40,347 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 11:38:40" (1/1) ... [2024-06-14 11:38:40,411 INFO L138 Inliner]: procedures = 176, calls = 51, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 77 [2024-06-14 11:38:40,411 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 11:38:40,412 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 11:38:40,413 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 11:38:40,413 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 11:38:40,426 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 11:38:40" (1/1) ... [2024-06-14 11:38:40,427 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 11:38:40" (1/1) ... [2024-06-14 11:38:40,430 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 11:38:40" (1/1) ... [2024-06-14 11:38:40,445 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 11:38:40,445 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 11:38:40" (1/1) ... [2024-06-14 11:38:40,445 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 11:38:40" (1/1) ... [2024-06-14 11:38:40,450 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 11:38:40" (1/1) ... [2024-06-14 11:38:40,451 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 11:38:40" (1/1) ... [2024-06-14 11:38:40,452 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 11:38:40" (1/1) ... [2024-06-14 11:38:40,453 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 11:38:40" (1/1) ... [2024-06-14 11:38:40,454 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 11:38:40,455 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 11:38:40,455 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 11:38:40,455 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 11:38:40,456 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 11:38:40" (1/1) ... [2024-06-14 11:38:40,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:38:40,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 11:38:40,475 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 11:38:40,492 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 11:38:40,501 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 11:38:40,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 11:38:40,502 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 11:38:40,502 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 11:38:40,502 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 11:38:40,502 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 11:38:40,502 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 11:38:40,502 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 11:38:40,502 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 11:38:40,503 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 11:38:40,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 11:38:40,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 11:38:40,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 11:38:40,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 11:38:40,504 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 11:38:40,594 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 11:38:40,595 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 11:38:40,793 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 11:38:40,793 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 11:38:40,893 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 11:38:40,895 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 11:38:40,895 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:38:40 BoogieIcfgContainer [2024-06-14 11:38:40,895 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 11:38:40,897 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 11:38:40,897 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 11:38:40,900 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 11:38:40,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 11:38:39" (1/4) ... [2024-06-14 11:38:40,901 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629ed0f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:38:40, skipping insertion in model container [2024-06-14 11:38:40,901 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:38:39" (2/4) ... [2024-06-14 11:38:40,901 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629ed0f9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:38:40, skipping insertion in model container [2024-06-14 11:38:40,902 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 11:38:40" (3/4) ... [2024-06-14 11:38:40,903 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629ed0f9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:38:40, skipping insertion in model container [2024-06-14 11:38:40,903 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:38:40" (4/4) ... [2024-06-14 11:38:40,904 INFO L112 eAbstractionObserver]: Analyzing ICFG thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 11:38:40,920 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 11:38:40,920 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 11:38:40,920 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 11:38:40,975 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 11:38:41,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-14 11:38:41,025 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-14 11:38:41,025 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:38:41,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 11:38:41,028 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-14 11:38:41,031 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-14 11:38:41,045 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 11:38:41,051 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;@729f865d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 11:38:41,051 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 11:38:41,059 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 11:38:41,059 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 11:38:41,059 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:38:41,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:41,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 11:38:41,060 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:38:41,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:41,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1238650552, now seen corresponding path program 1 times [2024-06-14 11:38:41,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:41,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679018433] [2024-06-14 11:38:41,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:41,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:41,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:41,496 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 11:38:41,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:41,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679018433] [2024-06-14 11:38:41,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679018433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:41,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:41,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 11:38:41,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524459676] [2024-06-14 11:38:41,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:41,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 11:38:41,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:41,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 11:38:41,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 11:38:41,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 52 [2024-06-14 11:38:41,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:41,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:41,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 52 [2024-06-14 11:38:41,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:42,106 INFO L124 PetriNetUnfolderBase]: 2723/4078 cut-off events. [2024-06-14 11:38:42,106 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-06-14 11:38:42,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8080 conditions, 4078 events. 2723/4078 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 22549 event pairs, 1898 based on Foata normal form. 1/3992 useless extension candidates. Maximal degree in co-relation 8064. Up to 3813 conditions per place. [2024-06-14 11:38:42,130 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 39 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-14 11:38:42,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 221 flow [2024-06-14 11:38:42,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 11:38:42,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 11:38:42,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2024-06-14 11:38:42,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6923076923076923 [2024-06-14 11:38:42,140 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 108 transitions. [2024-06-14 11:38:42,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 221 flow [2024-06-14 11:38:42,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 214 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 11:38:42,144 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-14 11:38:42,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-14 11:38:42,148 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-14 11:38:42,148 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-14 11:38:42,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:42,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:42,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:42,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 11:38:42,149 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:38:42,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:42,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1721547629, now seen corresponding path program 1 times [2024-06-14 11:38:42,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:42,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95315793] [2024-06-14 11:38:42,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:42,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:42,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:42,417 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 11:38:42,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:42,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95315793] [2024-06-14 11:38:42,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95315793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:42,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:42,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:38:42,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869913430] [2024-06-14 11:38:42,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:42,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:38:42,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:42,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:38:42,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:38:42,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-14 11:38:42,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:42,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:42,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-14 11:38:42,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:42,987 INFO L124 PetriNetUnfolderBase]: 4389/6482 cut-off events. [2024-06-14 11:38:42,987 INFO L125 PetriNetUnfolderBase]: For 1055/1077 co-relation queries the response was YES. [2024-06-14 11:38:42,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14774 conditions, 6482 events. 4389/6482 cut-off events. For 1055/1077 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 36434 event pairs, 2308 based on Foata normal form. 10/6482 useless extension candidates. Maximal degree in co-relation 14759. Up to 6039 conditions per place. [2024-06-14 11:38:43,024 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 56 selfloop transitions, 9 changer transitions 0/75 dead transitions. [2024-06-14 11:38:43,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 75 transitions, 344 flow [2024-06-14 11:38:43,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:38:43,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:38:43,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 137 transitions. [2024-06-14 11:38:43,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6586538461538461 [2024-06-14 11:38:43,026 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 137 transitions. [2024-06-14 11:38:43,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 75 transitions, 344 flow [2024-06-14 11:38:43,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 75 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 11:38:43,029 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 202 flow [2024-06-14 11:38:43,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-14 11:38:43,030 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 3 predicate places. [2024-06-14 11:38:43,030 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 202 flow [2024-06-14 11:38:43,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:43,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:43,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:43,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 11:38:43,031 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:38:43,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:43,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1846111926, now seen corresponding path program 1 times [2024-06-14 11:38:43,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:43,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897432649] [2024-06-14 11:38:43,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:43,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:43,314 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 11:38:43,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:43,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897432649] [2024-06-14 11:38:43,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897432649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:43,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:43,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:38:43,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526153731] [2024-06-14 11:38:43,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:43,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:38:43,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:43,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:38:43,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:38:43,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-14 11:38:43,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:43,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:43,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-14 11:38:43,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:43,911 INFO L124 PetriNetUnfolderBase]: 4373/6454 cut-off events. [2024-06-14 11:38:43,911 INFO L125 PetriNetUnfolderBase]: For 3049/3136 co-relation queries the response was YES. [2024-06-14 11:38:43,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16582 conditions, 6454 events. 4373/6454 cut-off events. For 3049/3136 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 36274 event pairs, 1831 based on Foata normal form. 32/6476 useless extension candidates. Maximal degree in co-relation 16564. Up to 5973 conditions per place. [2024-06-14 11:38:43,953 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 63 selfloop transitions, 12 changer transitions 0/85 dead transitions. [2024-06-14 11:38:43,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 85 transitions, 436 flow [2024-06-14 11:38:43,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:38:43,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:38:43,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 165 transitions. [2024-06-14 11:38:43,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-14 11:38:43,959 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 202 flow. Second operand 5 states and 165 transitions. [2024-06-14 11:38:43,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 85 transitions, 436 flow [2024-06-14 11:38:43,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 85 transitions, 432 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-14 11:38:43,964 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 248 flow [2024-06-14 11:38:43,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2024-06-14 11:38:43,965 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2024-06-14 11:38:43,965 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 248 flow [2024-06-14 11:38:43,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:43,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:43,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:43,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 11:38:43,966 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:38:43,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:43,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1305937115, now seen corresponding path program 1 times [2024-06-14 11:38:43,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:43,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747178814] [2024-06-14 11:38:43,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:43,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:43,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:44,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:44,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:44,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747178814] [2024-06-14 11:38:44,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747178814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:44,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:44,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:38:44,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129295824] [2024-06-14 11:38:44,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:44,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:38:44,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:44,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:38:44,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:38:44,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-14 11:38:44,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:44,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:44,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-14 11:38:44,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:44,808 INFO L124 PetriNetUnfolderBase]: 4310/6335 cut-off events. [2024-06-14 11:38:44,809 INFO L125 PetriNetUnfolderBase]: For 5513/5523 co-relation queries the response was YES. [2024-06-14 11:38:44,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17800 conditions, 6335 events. 4310/6335 cut-off events. For 5513/5523 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 35990 event pairs, 2266 based on Foata normal form. 6/6330 useless extension candidates. Maximal degree in co-relation 17779. Up to 5934 conditions per place. [2024-06-14 11:38:44,844 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 63 selfloop transitions, 11 changer transitions 0/84 dead transitions. [2024-06-14 11:38:44,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 84 transitions, 500 flow [2024-06-14 11:38:44,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:38:44,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:38:44,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-06-14 11:38:44,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-14 11:38:44,845 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 248 flow. Second operand 4 states and 132 transitions. [2024-06-14 11:38:44,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 84 transitions, 500 flow [2024-06-14 11:38:44,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 84 transitions, 464 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 11:38:44,852 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 325 flow [2024-06-14 11:38:44,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=325, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-06-14 11:38:44,853 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2024-06-14 11:38:44,853 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 325 flow [2024-06-14 11:38:44,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:44,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:44,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:44,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 11:38:44,854 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:38:44,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:44,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1413391936, now seen corresponding path program 1 times [2024-06-14 11:38:44,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:44,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002719031] [2024-06-14 11:38:44,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:44,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:45,040 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 11:38:45,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:45,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002719031] [2024-06-14 11:38:45,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002719031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:45,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:45,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:38:45,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162984443] [2024-06-14 11:38:45,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:45,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:38:45,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:45,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:38:45,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:38:45,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-14 11:38:45,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 325 flow. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:45,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:45,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-14 11:38:45,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:45,732 INFO L124 PetriNetUnfolderBase]: 5207/7677 cut-off events. [2024-06-14 11:38:45,732 INFO L125 PetriNetUnfolderBase]: For 11031/11297 co-relation queries the response was YES. [2024-06-14 11:38:45,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23683 conditions, 7677 events. 5207/7677 cut-off events. For 11031/11297 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 44253 event pairs, 2250 based on Foata normal form. 57/7672 useless extension candidates. Maximal degree in co-relation 23660. Up to 7050 conditions per place. [2024-06-14 11:38:45,772 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 68 selfloop transitions, 25 changer transitions 0/105 dead transitions. [2024-06-14 11:38:45,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 105 transitions, 665 flow [2024-06-14 11:38:45,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:38:45,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:38:45,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 169 transitions. [2024-06-14 11:38:45,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-14 11:38:45,774 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 325 flow. Second operand 5 states and 169 transitions. [2024-06-14 11:38:45,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 105 transitions, 665 flow [2024-06-14 11:38:45,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 105 transitions, 657 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-14 11:38:45,786 INFO L231 Difference]: Finished difference. Result has 69 places, 74 transitions, 438 flow [2024-06-14 11:38:45,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=438, PETRI_PLACES=69, PETRI_TRANSITIONS=74} [2024-06-14 11:38:45,791 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 14 predicate places. [2024-06-14 11:38:45,791 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 74 transitions, 438 flow [2024-06-14 11:38:45,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:45,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:45,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:45,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 11:38:45,792 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:38:45,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:45,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1402172416, now seen corresponding path program 2 times [2024-06-14 11:38:45,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:45,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495763579] [2024-06-14 11:38:45,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:45,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:45,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:46,027 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 11:38:46,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:46,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495763579] [2024-06-14 11:38:46,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495763579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:46,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:46,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:38:46,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51697140] [2024-06-14 11:38:46,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:46,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:38:46,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:46,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:38:46,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:38:46,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-14 11:38:46,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 74 transitions, 438 flow. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:46,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:46,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-14 11:38:46,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:46,712 INFO L124 PetriNetUnfolderBase]: 5198/7665 cut-off events. [2024-06-14 11:38:46,712 INFO L125 PetriNetUnfolderBase]: For 17236/17544 co-relation queries the response was YES. [2024-06-14 11:38:46,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26021 conditions, 7665 events. 5198/7665 cut-off events. For 17236/17544 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 44041 event pairs, 2250 based on Foata normal form. 65/7670 useless extension candidates. Maximal degree in co-relation 25995. Up to 7056 conditions per place. [2024-06-14 11:38:46,753 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 62 selfloop transitions, 21 changer transitions 0/95 dead transitions. [2024-06-14 11:38:46,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 658 flow [2024-06-14 11:38:46,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:38:46,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:38:46,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 137 transitions. [2024-06-14 11:38:46,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6586538461538461 [2024-06-14 11:38:46,755 INFO L175 Difference]: Start difference. First operand has 69 places, 74 transitions, 438 flow. Second operand 4 states and 137 transitions. [2024-06-14 11:38:46,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 658 flow [2024-06-14 11:38:46,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 95 transitions, 615 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-14 11:38:46,768 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 455 flow [2024-06-14 11:38:46,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=455, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-06-14 11:38:46,769 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 17 predicate places. [2024-06-14 11:38:46,769 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 455 flow [2024-06-14 11:38:46,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:46,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:46,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:46,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 11:38:46,770 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:38:46,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:46,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1343067912, now seen corresponding path program 1 times [2024-06-14 11:38:46,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:46,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520848467] [2024-06-14 11:38:46,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:46,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:46,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:46,949 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 11:38:46,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:46,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520848467] [2024-06-14 11:38:46,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520848467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:46,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:46,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:38:46,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429210922] [2024-06-14 11:38:46,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:46,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:38:46,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:46,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:38:46,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:38:46,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-14 11:38:46,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 455 flow. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:46,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:46,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-14 11:38:46,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:47,478 INFO L124 PetriNetUnfolderBase]: 4317/6351 cut-off events. [2024-06-14 11:38:47,479 INFO L125 PetriNetUnfolderBase]: For 15941/15980 co-relation queries the response was YES. [2024-06-14 11:38:47,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22023 conditions, 6351 events. 4317/6351 cut-off events. For 15941/15980 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 36181 event pairs, 2074 based on Foata normal form. 19/6357 useless extension candidates. Maximal degree in co-relation 21995. Up to 5913 conditions per place. [2024-06-14 11:38:47,512 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 79 selfloop transitions, 14 changer transitions 0/103 dead transitions. [2024-06-14 11:38:47,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 103 transitions, 732 flow [2024-06-14 11:38:47,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:38:47,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:38:47,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-14 11:38:47,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6192307692307693 [2024-06-14 11:38:47,514 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 455 flow. Second operand 5 states and 161 transitions. [2024-06-14 11:38:47,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 103 transitions, 732 flow [2024-06-14 11:38:47,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 103 transitions, 690 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 11:38:47,522 INFO L231 Difference]: Finished difference. Result has 74 places, 77 transitions, 479 flow [2024-06-14 11:38:47,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=479, PETRI_PLACES=74, PETRI_TRANSITIONS=77} [2024-06-14 11:38:47,523 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 19 predicate places. [2024-06-14 11:38:47,523 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 77 transitions, 479 flow [2024-06-14 11:38:47,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:47,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:47,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:47,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 11:38:47,524 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:38:47,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:47,524 INFO L85 PathProgramCache]: Analyzing trace with hash 152893862, now seen corresponding path program 1 times [2024-06-14 11:38:47,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:47,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114295641] [2024-06-14 11:38:47,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:47,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:47,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:47,737 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 11:38:47,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:47,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114295641] [2024-06-14 11:38:47,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114295641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:47,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:47,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:38:47,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824683747] [2024-06-14 11:38:47,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:47,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:38:47,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:47,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:38:47,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:38:47,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-14 11:38:47,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 77 transitions, 479 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:47,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:47,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-14 11:38:47,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:48,334 INFO L124 PetriNetUnfolderBase]: 5487/8006 cut-off events. [2024-06-14 11:38:48,334 INFO L125 PetriNetUnfolderBase]: For 24508/24685 co-relation queries the response was YES. [2024-06-14 11:38:48,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28818 conditions, 8006 events. 5487/8006 cut-off events. For 24508/24685 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 45276 event pairs, 2358 based on Foata normal form. 40/8021 useless extension candidates. Maximal degree in co-relation 28789. Up to 7366 conditions per place. [2024-06-14 11:38:48,387 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 98 selfloop transitions, 27 changer transitions 0/134 dead transitions. [2024-06-14 11:38:48,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 134 transitions, 999 flow [2024-06-14 11:38:48,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:38:48,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:38:48,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2024-06-14 11:38:48,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-14 11:38:48,389 INFO L175 Difference]: Start difference. First operand has 74 places, 77 transitions, 479 flow. Second operand 6 states and 195 transitions. [2024-06-14 11:38:48,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 134 transitions, 999 flow [2024-06-14 11:38:48,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 134 transitions, 959 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 11:38:48,403 INFO L231 Difference]: Finished difference. Result has 79 places, 94 transitions, 667 flow [2024-06-14 11:38:48,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=667, PETRI_PLACES=79, PETRI_TRANSITIONS=94} [2024-06-14 11:38:48,404 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 24 predicate places. [2024-06-14 11:38:48,404 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 94 transitions, 667 flow [2024-06-14 11:38:48,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:48,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:48,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:48,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 11:38:48,405 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:38:48,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:48,405 INFO L85 PathProgramCache]: Analyzing trace with hash -517664846, now seen corresponding path program 2 times [2024-06-14 11:38:48,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:48,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337389095] [2024-06-14 11:38:48,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:48,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:48,608 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 11:38:48,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:48,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337389095] [2024-06-14 11:38:48,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337389095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:48,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:48,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:38:48,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452425031] [2024-06-14 11:38:48,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:48,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:38:48,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:48,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:38:48,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:38:48,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-14 11:38:48,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 94 transitions, 667 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:48,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:48,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-14 11:38:48,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:49,242 INFO L124 PetriNetUnfolderBase]: 5509/8052 cut-off events. [2024-06-14 11:38:49,242 INFO L125 PetriNetUnfolderBase]: For 32038/32364 co-relation queries the response was YES. [2024-06-14 11:38:49,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31089 conditions, 8052 events. 5509/8052 cut-off events. For 32038/32364 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 45539 event pairs, 2336 based on Foata normal form. 81/8115 useless extension candidates. Maximal degree in co-relation 31057. Up to 7419 conditions per place. [2024-06-14 11:38:49,293 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 112 selfloop transitions, 26 changer transitions 0/147 dead transitions. [2024-06-14 11:38:49,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 147 transitions, 1168 flow [2024-06-14 11:38:49,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:38:49,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:38:49,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 222 transitions. [2024-06-14 11:38:49,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6098901098901099 [2024-06-14 11:38:49,294 INFO L175 Difference]: Start difference. First operand has 79 places, 94 transitions, 667 flow. Second operand 7 states and 222 transitions. [2024-06-14 11:38:49,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 147 transitions, 1168 flow [2024-06-14 11:38:49,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 147 transitions, 1114 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-14 11:38:49,317 INFO L231 Difference]: Finished difference. Result has 85 places, 100 transitions, 743 flow [2024-06-14 11:38:49,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=743, PETRI_PLACES=85, PETRI_TRANSITIONS=100} [2024-06-14 11:38:49,317 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 30 predicate places. [2024-06-14 11:38:49,318 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 100 transitions, 743 flow [2024-06-14 11:38:49,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:49,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:49,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:49,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 11:38:49,318 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:38:49,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:49,319 INFO L85 PathProgramCache]: Analyzing trace with hash -517670426, now seen corresponding path program 3 times [2024-06-14 11:38:49,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:49,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837278850] [2024-06-14 11:38:49,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:49,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:49,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:49,507 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 11:38:49,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:49,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837278850] [2024-06-14 11:38:49,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837278850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:49,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:49,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:38:49,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923132497] [2024-06-14 11:38:49,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:49,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:38:49,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:49,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:38:49,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:38:49,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-14 11:38:49,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 100 transitions, 743 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:49,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:49,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-14 11:38:49,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:50,142 INFO L124 PetriNetUnfolderBase]: 5500/8032 cut-off events. [2024-06-14 11:38:50,143 INFO L125 PetriNetUnfolderBase]: For 36452/36703 co-relation queries the response was YES. [2024-06-14 11:38:50,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31394 conditions, 8032 events. 5500/8032 cut-off events. For 36452/36703 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 45396 event pairs, 2358 based on Foata normal form. 65/8072 useless extension candidates. Maximal degree in co-relation 31360. Up to 7410 conditions per place. [2024-06-14 11:38:50,190 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 95 selfloop transitions, 25 changer transitions 0/129 dead transitions. [2024-06-14 11:38:50,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 129 transitions, 1060 flow [2024-06-14 11:38:50,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:38:50,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:38:50,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2024-06-14 11:38:50,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6307692307692307 [2024-06-14 11:38:50,191 INFO L175 Difference]: Start difference. First operand has 85 places, 100 transitions, 743 flow. Second operand 5 states and 164 transitions. [2024-06-14 11:38:50,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 129 transitions, 1060 flow [2024-06-14 11:38:50,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 129 transitions, 968 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 11:38:50,230 INFO L231 Difference]: Finished difference. Result has 86 places, 100 transitions, 712 flow [2024-06-14 11:38:50,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=712, PETRI_PLACES=86, PETRI_TRANSITIONS=100} [2024-06-14 11:38:50,231 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 31 predicate places. [2024-06-14 11:38:50,231 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 100 transitions, 712 flow [2024-06-14 11:38:50,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:50,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:50,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:50,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 11:38:50,231 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:38:50,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:50,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1709679874, now seen corresponding path program 1 times [2024-06-14 11:38:50,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:50,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294541922] [2024-06-14 11:38:50,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:50,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:50,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:50,394 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 11:38:50,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:50,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294541922] [2024-06-14 11:38:50,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294541922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:50,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:50,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:38:50,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137068905] [2024-06-14 11:38:50,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:50,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:38:50,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:50,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:38:50,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:38:50,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-14 11:38:50,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 100 transitions, 712 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 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 11:38:50,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:50,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-14 11:38:50,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:50,981 INFO L124 PetriNetUnfolderBase]: 4998/7360 cut-off events. [2024-06-14 11:38:50,981 INFO L125 PetriNetUnfolderBase]: For 40838/40861 co-relation queries the response was YES. [2024-06-14 11:38:51,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29609 conditions, 7360 events. 4998/7360 cut-off events. For 40838/40861 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 42865 event pairs, 2477 based on Foata normal form. 27/7358 useless extension candidates. Maximal degree in co-relation 29574. Up to 6752 conditions per place. [2024-06-14 11:38:51,034 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 100 selfloop transitions, 14 changer transitions 0/128 dead transitions. [2024-06-14 11:38:51,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 128 transitions, 1088 flow [2024-06-14 11:38:51,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:38:51,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:38:51,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-06-14 11:38:51,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-14 11:38:51,036 INFO L175 Difference]: Start difference. First operand has 86 places, 100 transitions, 712 flow. Second operand 4 states and 128 transitions. [2024-06-14 11:38:51,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 128 transitions, 1088 flow [2024-06-14 11:38:51,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 128 transitions, 1032 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 11:38:51,068 INFO L231 Difference]: Finished difference. Result has 87 places, 113 transitions, 835 flow [2024-06-14 11:38:51,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=835, PETRI_PLACES=87, PETRI_TRANSITIONS=113} [2024-06-14 11:38:51,069 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 32 predicate places. [2024-06-14 11:38:51,069 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 113 transitions, 835 flow [2024-06-14 11:38:51,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 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 11:38:51,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:51,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:51,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 11:38:51,070 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:38:51,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:51,070 INFO L85 PathProgramCache]: Analyzing trace with hash 441882047, now seen corresponding path program 1 times [2024-06-14 11:38:51,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:51,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694977378] [2024-06-14 11:38:51,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:51,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:51,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:51,284 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 11:38:51,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:51,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694977378] [2024-06-14 11:38:51,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694977378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:51,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:51,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:38:51,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091332797] [2024-06-14 11:38:51,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:51,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:38:51,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:51,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:38:51,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:38:51,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-14 11:38:51,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 113 transitions, 835 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:51,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:51,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-14 11:38:51,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:52,209 INFO L124 PetriNetUnfolderBase]: 6100/8926 cut-off events. [2024-06-14 11:38:52,210 INFO L125 PetriNetUnfolderBase]: For 65148/65365 co-relation queries the response was YES. [2024-06-14 11:38:52,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39636 conditions, 8926 events. 6100/8926 cut-off events. For 65148/65365 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 52025 event pairs, 1808 based on Foata normal form. 62/8736 useless extension candidates. Maximal degree in co-relation 39599. Up to 7913 conditions per place. [2024-06-14 11:38:52,282 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 90 selfloop transitions, 49 changer transitions 0/159 dead transitions. [2024-06-14 11:38:52,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 159 transitions, 1345 flow [2024-06-14 11:38:52,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:38:52,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:38:52,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 199 transitions. [2024-06-14 11:38:52,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6378205128205128 [2024-06-14 11:38:52,294 INFO L175 Difference]: Start difference. First operand has 87 places, 113 transitions, 835 flow. Second operand 6 states and 199 transitions. [2024-06-14 11:38:52,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 159 transitions, 1345 flow [2024-06-14 11:38:52,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 159 transitions, 1335 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-14 11:38:52,377 INFO L231 Difference]: Finished difference. Result has 93 places, 119 transitions, 1007 flow [2024-06-14 11:38:52,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1007, PETRI_PLACES=93, PETRI_TRANSITIONS=119} [2024-06-14 11:38:52,378 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 38 predicate places. [2024-06-14 11:38:52,378 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 119 transitions, 1007 flow [2024-06-14 11:38:52,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:52,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:52,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:52,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 11:38:52,379 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:38:52,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:52,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1059941569, now seen corresponding path program 2 times [2024-06-14 11:38:52,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:52,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001738138] [2024-06-14 11:38:52,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:52,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:52,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:52,638 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 11:38:52,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:52,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001738138] [2024-06-14 11:38:52,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001738138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:52,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:52,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:38:52,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2878236] [2024-06-14 11:38:52,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:52,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:38:52,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:52,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:38:52,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:38:52,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-14 11:38:52,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 119 transitions, 1007 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:52,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:52,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-14 11:38:52,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:53,570 INFO L124 PetriNetUnfolderBase]: 6152/8994 cut-off events. [2024-06-14 11:38:53,570 INFO L125 PetriNetUnfolderBase]: For 82571/82865 co-relation queries the response was YES. [2024-06-14 11:38:53,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42498 conditions, 8994 events. 6152/8994 cut-off events. For 82571/82865 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 52385 event pairs, 2212 based on Foata normal form. 75/8805 useless extension candidates. Maximal degree in co-relation 42458. Up to 8117 conditions per place. [2024-06-14 11:38:53,621 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 93 selfloop transitions, 45 changer transitions 0/158 dead transitions. [2024-06-14 11:38:53,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 158 transitions, 1415 flow [2024-06-14 11:38:53,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:38:53,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:38:53,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2024-06-14 11:38:53,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-14 11:38:53,624 INFO L175 Difference]: Start difference. First operand has 93 places, 119 transitions, 1007 flow. Second operand 6 states and 195 transitions. [2024-06-14 11:38:53,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 158 transitions, 1415 flow [2024-06-14 11:38:53,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 158 transitions, 1331 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-14 11:38:53,690 INFO L231 Difference]: Finished difference. Result has 97 places, 122 transitions, 1070 flow [2024-06-14 11:38:53,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=929, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1070, PETRI_PLACES=97, PETRI_TRANSITIONS=122} [2024-06-14 11:38:53,691 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 42 predicate places. [2024-06-14 11:38:53,691 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 122 transitions, 1070 flow [2024-06-14 11:38:53,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:53,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:53,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:53,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 11:38:53,692 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:38:53,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:53,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1132082559, now seen corresponding path program 3 times [2024-06-14 11:38:53,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:53,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748097547] [2024-06-14 11:38:53,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:53,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:53,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:53,895 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 11:38:53,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:53,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748097547] [2024-06-14 11:38:53,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748097547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:53,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:53,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:38:53,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720360510] [2024-06-14 11:38:53,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:53,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:38:53,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:53,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:38:53,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:38:53,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-14 11:38:53,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 122 transitions, 1070 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:53,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:53,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-14 11:38:53,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:54,665 INFO L124 PetriNetUnfolderBase]: 6120/8959 cut-off events. [2024-06-14 11:38:54,666 INFO L125 PetriNetUnfolderBase]: For 90292/90580 co-relation queries the response was YES. [2024-06-14 11:38:54,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42932 conditions, 8959 events. 6120/8959 cut-off events. For 90292/90580 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 52219 event pairs, 1798 based on Foata normal form. 106/8808 useless extension candidates. Maximal degree in co-relation 42890. Up to 8047 conditions per place. [2024-06-14 11:38:54,731 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 90 selfloop transitions, 41 changer transitions 0/151 dead transitions. [2024-06-14 11:38:54,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 151 transitions, 1406 flow [2024-06-14 11:38:54,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:38:54,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:38:54,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2024-06-14 11:38:54,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6423076923076924 [2024-06-14 11:38:54,734 INFO L175 Difference]: Start difference. First operand has 97 places, 122 transitions, 1070 flow. Second operand 5 states and 167 transitions. [2024-06-14 11:38:54,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 151 transitions, 1406 flow [2024-06-14 11:38:54,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 151 transitions, 1289 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 11:38:54,818 INFO L231 Difference]: Finished difference. Result has 98 places, 122 transitions, 1051 flow [2024-06-14 11:38:54,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=953, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1051, PETRI_PLACES=98, PETRI_TRANSITIONS=122} [2024-06-14 11:38:54,818 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 43 predicate places. [2024-06-14 11:38:54,818 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 122 transitions, 1051 flow [2024-06-14 11:38:54,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:54,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:54,819 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 11:38:54,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 11:38:54,819 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:38:54,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:54,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1412985479, now seen corresponding path program 1 times [2024-06-14 11:38:54,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:54,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139662372] [2024-06-14 11:38:54,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:54,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:54,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:55,016 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 11:38:55,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:55,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139662372] [2024-06-14 11:38:55,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139662372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:55,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:55,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:55,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311451249] [2024-06-14 11:38:55,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:55,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:55,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:55,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:55,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:55,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-14 11:38:55,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 122 transitions, 1051 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:55,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:55,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-14 11:38:55,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:55,965 INFO L124 PetriNetUnfolderBase]: 6715/9793 cut-off events. [2024-06-14 11:38:55,965 INFO L125 PetriNetUnfolderBase]: For 94509/94826 co-relation queries the response was YES. [2024-06-14 11:38:55,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45993 conditions, 9793 events. 6715/9793 cut-off events. For 94509/94826 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 56812 event pairs, 1908 based on Foata normal form. 117/9859 useless extension candidates. Maximal degree in co-relation 45950. Up to 8482 conditions per place. [2024-06-14 11:38:56,024 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 135 selfloop transitions, 43 changer transitions 0/189 dead transitions. [2024-06-14 11:38:56,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 189 transitions, 1765 flow [2024-06-14 11:38:56,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:38:56,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:38:56,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2024-06-14 11:38:56,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6263736263736264 [2024-06-14 11:38:56,025 INFO L175 Difference]: Start difference. First operand has 98 places, 122 transitions, 1051 flow. Second operand 7 states and 228 transitions. [2024-06-14 11:38:56,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 189 transitions, 1765 flow [2024-06-14 11:38:56,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 189 transitions, 1658 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 11:38:56,106 INFO L231 Difference]: Finished difference. Result has 103 places, 133 transitions, 1191 flow [2024-06-14 11:38:56,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1191, PETRI_PLACES=103, PETRI_TRANSITIONS=133} [2024-06-14 11:38:56,107 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 48 predicate places. [2024-06-14 11:38:56,107 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 133 transitions, 1191 flow [2024-06-14 11:38:56,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:56,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:56,108 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 11:38:56,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 11:38:56,108 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:38:56,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:56,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1501551239, now seen corresponding path program 2 times [2024-06-14 11:38:56,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:56,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962623578] [2024-06-14 11:38:56,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:56,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:56,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:56,311 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 11:38:56,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:56,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962623578] [2024-06-14 11:38:56,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962623578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:56,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:56,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:56,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604538091] [2024-06-14 11:38:56,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:56,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:56,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:56,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:56,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:56,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-14 11:38:56,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 133 transitions, 1191 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:56,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:56,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-14 11:38:56,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:57,206 INFO L124 PetriNetUnfolderBase]: 6989/10199 cut-off events. [2024-06-14 11:38:57,206 INFO L125 PetriNetUnfolderBase]: For 112685/113054 co-relation queries the response was YES. [2024-06-14 11:38:57,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49946 conditions, 10199 events. 6989/10199 cut-off events. For 112685/113054 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 59624 event pairs, 2358 based on Foata normal form. 127/10275 useless extension candidates. Maximal degree in co-relation 49900. Up to 9096 conditions per place. [2024-06-14 11:38:57,279 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 141 selfloop transitions, 39 changer transitions 0/191 dead transitions. [2024-06-14 11:38:57,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 191 transitions, 1851 flow [2024-06-14 11:38:57,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:38:57,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:38:57,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2024-06-14 11:38:57,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6263736263736264 [2024-06-14 11:38:57,280 INFO L175 Difference]: Start difference. First operand has 103 places, 133 transitions, 1191 flow. Second operand 7 states and 228 transitions. [2024-06-14 11:38:57,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 191 transitions, 1851 flow [2024-06-14 11:38:57,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 191 transitions, 1792 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 11:38:57,401 INFO L231 Difference]: Finished difference. Result has 109 places, 138 transitions, 1297 flow [2024-06-14 11:38:57,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1132, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1297, PETRI_PLACES=109, PETRI_TRANSITIONS=138} [2024-06-14 11:38:57,402 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 54 predicate places. [2024-06-14 11:38:57,402 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 138 transitions, 1297 flow [2024-06-14 11:38:57,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:57,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:57,403 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 11:38:57,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 11:38:57,403 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:38:57,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:57,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1501699109, now seen corresponding path program 3 times [2024-06-14 11:38:57,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:57,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436457461] [2024-06-14 11:38:57,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:57,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:57,601 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 11:38:57,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:57,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436457461] [2024-06-14 11:38:57,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436457461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:57,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:57,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:57,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854509988] [2024-06-14 11:38:57,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:57,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:57,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:57,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:57,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:57,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-14 11:38:57,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 138 transitions, 1297 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:57,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:57,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-14 11:38:57,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:58,559 INFO L124 PetriNetUnfolderBase]: 6935/10121 cut-off events. [2024-06-14 11:38:58,559 INFO L125 PetriNetUnfolderBase]: For 122389/122760 co-relation queries the response was YES. [2024-06-14 11:38:58,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50417 conditions, 10121 events. 6935/10121 cut-off events. For 122389/122760 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 59036 event pairs, 2363 based on Foata normal form. 133/10203 useless extension candidates. Maximal degree in co-relation 50368. Up to 9216 conditions per place. [2024-06-14 11:38:58,626 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 139 selfloop transitions, 36 changer transitions 0/186 dead transitions. [2024-06-14 11:38:58,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 186 transitions, 1790 flow [2024-06-14 11:38:58,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:38:58,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:38:58,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 222 transitions. [2024-06-14 11:38:58,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6098901098901099 [2024-06-14 11:38:58,627 INFO L175 Difference]: Start difference. First operand has 109 places, 138 transitions, 1297 flow. Second operand 7 states and 222 transitions. [2024-06-14 11:38:58,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 186 transitions, 1790 flow [2024-06-14 11:38:58,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 186 transitions, 1721 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-14 11:38:58,783 INFO L231 Difference]: Finished difference. Result has 113 places, 139 transitions, 1324 flow [2024-06-14 11:38:58,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1230, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1324, PETRI_PLACES=113, PETRI_TRANSITIONS=139} [2024-06-14 11:38:58,784 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 58 predicate places. [2024-06-14 11:38:58,784 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 139 transitions, 1324 flow [2024-06-14 11:38:58,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:58,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:58,784 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 11:38:58,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 11:38:58,785 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:38:58,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:58,785 INFO L85 PathProgramCache]: Analyzing trace with hash 740332721, now seen corresponding path program 4 times [2024-06-14 11:38:58,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:58,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999522835] [2024-06-14 11:38:58,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:58,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:59,032 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 11:38:59,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:59,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999522835] [2024-06-14 11:38:59,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999522835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:59,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:59,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:59,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794782811] [2024-06-14 11:38:59,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:59,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:59,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:59,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:59,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:59,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-14 11:38:59,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 139 transitions, 1324 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:59,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:59,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-14 11:38:59,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:59,993 INFO L124 PetriNetUnfolderBase]: 6968/10192 cut-off events. [2024-06-14 11:38:59,994 INFO L125 PetriNetUnfolderBase]: For 131050/131427 co-relation queries the response was YES. [2024-06-14 11:39:00,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51083 conditions, 10192 events. 6968/10192 cut-off events. For 131050/131427 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 59535 event pairs, 2343 based on Foata normal form. 142/10293 useless extension candidates. Maximal degree in co-relation 51032. Up to 9310 conditions per place. [2024-06-14 11:39:00,078 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 154 selfloop transitions, 31 changer transitions 0/196 dead transitions. [2024-06-14 11:39:00,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 196 transitions, 1879 flow [2024-06-14 11:39:00,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:39:00,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:39:00,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 249 transitions. [2024-06-14 11:39:00,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5985576923076923 [2024-06-14 11:39:00,080 INFO L175 Difference]: Start difference. First operand has 113 places, 139 transitions, 1324 flow. Second operand 8 states and 249 transitions. [2024-06-14 11:39:00,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 196 transitions, 1879 flow [2024-06-14 11:39:00,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 196 transitions, 1807 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 11:39:00,227 INFO L231 Difference]: Finished difference. Result has 116 places, 141 transitions, 1362 flow [2024-06-14 11:39:00,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1362, PETRI_PLACES=116, PETRI_TRANSITIONS=141} [2024-06-14 11:39:00,228 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 61 predicate places. [2024-06-14 11:39:00,228 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 141 transitions, 1362 flow [2024-06-14 11:39:00,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:00,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:00,228 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 11:39:00,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 11:39:00,229 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:39:00,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:00,229 INFO L85 PathProgramCache]: Analyzing trace with hash 734970341, now seen corresponding path program 5 times [2024-06-14 11:39:00,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:00,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614360043] [2024-06-14 11:39:00,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:00,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:00,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:00,445 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 11:39:00,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:00,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614360043] [2024-06-14 11:39:00,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614360043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:00,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:00,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:00,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531309379] [2024-06-14 11:39:00,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:00,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:00,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:00,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:00,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:00,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-14 11:39:00,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 141 transitions, 1362 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:00,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:00,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-14 11:39:00,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:01,545 INFO L124 PetriNetUnfolderBase]: 7114/10416 cut-off events. [2024-06-14 11:39:01,545 INFO L125 PetriNetUnfolderBase]: For 145143/145514 co-relation queries the response was YES. [2024-06-14 11:39:01,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53033 conditions, 10416 events. 7114/10416 cut-off events. For 145143/145514 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 61023 event pairs, 2399 based on Foata normal form. 127/10494 useless extension candidates. Maximal degree in co-relation 52981. Up to 9523 conditions per place. [2024-06-14 11:39:01,634 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 143 selfloop transitions, 29 changer transitions 0/183 dead transitions. [2024-06-14 11:39:01,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 183 transitions, 1857 flow [2024-06-14 11:39:01,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:39:01,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:39:01,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-14 11:39:01,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6217948717948718 [2024-06-14 11:39:01,635 INFO L175 Difference]: Start difference. First operand has 116 places, 141 transitions, 1362 flow. Second operand 6 states and 194 transitions. [2024-06-14 11:39:01,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 183 transitions, 1857 flow [2024-06-14 11:39:01,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 183 transitions, 1785 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 11:39:01,821 INFO L231 Difference]: Finished difference. Result has 116 places, 143 transitions, 1400 flow [2024-06-14 11:39:01,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1290, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1400, PETRI_PLACES=116, PETRI_TRANSITIONS=143} [2024-06-14 11:39:01,822 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 61 predicate places. [2024-06-14 11:39:01,822 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 143 transitions, 1400 flow [2024-06-14 11:39:01,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:01,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:01,822 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 11:39:01,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 11:39:01,822 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:39:01,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:01,823 INFO L85 PathProgramCache]: Analyzing trace with hash 734822471, now seen corresponding path program 6 times [2024-06-14 11:39:01,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:01,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604815355] [2024-06-14 11:39:01,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:01,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:01,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:02,070 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 11:39:02,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:02,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604815355] [2024-06-14 11:39:02,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604815355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:02,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:02,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:02,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856184842] [2024-06-14 11:39:02,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:02,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:02,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:02,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:02,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:02,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-14 11:39:02,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 143 transitions, 1400 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:02,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:02,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-14 11:39:02,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:03,233 INFO L124 PetriNetUnfolderBase]: 7075/10355 cut-off events. [2024-06-14 11:39:03,233 INFO L125 PetriNetUnfolderBase]: For 152682/153045 co-relation queries the response was YES. [2024-06-14 11:39:03,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52979 conditions, 10355 events. 7075/10355 cut-off events. For 152682/153045 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 60676 event pairs, 1958 based on Foata normal form. 141/10447 useless extension candidates. Maximal degree in co-relation 52926. Up to 9116 conditions per place. [2024-06-14 11:39:03,331 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 140 selfloop transitions, 37 changer transitions 0/188 dead transitions. [2024-06-14 11:39:03,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 188 transitions, 1897 flow [2024-06-14 11:39:03,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:39:03,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:39:03,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 197 transitions. [2024-06-14 11:39:03,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6314102564102564 [2024-06-14 11:39:03,333 INFO L175 Difference]: Start difference. First operand has 116 places, 143 transitions, 1400 flow. Second operand 6 states and 197 transitions. [2024-06-14 11:39:03,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 188 transitions, 1897 flow [2024-06-14 11:39:03,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 188 transitions, 1815 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 11:39:03,563 INFO L231 Difference]: Finished difference. Result has 119 places, 145 transitions, 1438 flow [2024-06-14 11:39:03,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1320, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1438, PETRI_PLACES=119, PETRI_TRANSITIONS=145} [2024-06-14 11:39:03,563 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 64 predicate places. [2024-06-14 11:39:03,563 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 145 transitions, 1438 flow [2024-06-14 11:39:03,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:03,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:03,564 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 11:39:03,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 11:39:03,564 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:39:03,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:03,564 INFO L85 PathProgramCache]: Analyzing trace with hash 740547923, now seen corresponding path program 1 times [2024-06-14 11:39:03,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:03,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520965396] [2024-06-14 11:39:03,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:03,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:03,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:03,801 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 11:39:03,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:03,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520965396] [2024-06-14 11:39:03,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520965396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:03,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:03,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:03,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450549896] [2024-06-14 11:39:03,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:03,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:03,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:03,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:03,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:03,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-14 11:39:03,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 145 transitions, 1438 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:03,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:03,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-14 11:39:03,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:04,918 INFO L124 PetriNetUnfolderBase]: 6967/10209 cut-off events. [2024-06-14 11:39:04,919 INFO L125 PetriNetUnfolderBase]: For 159572/159923 co-relation queries the response was YES. [2024-06-14 11:39:04,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52530 conditions, 10209 events. 6967/10209 cut-off events. For 159572/159923 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 59633 event pairs, 2184 based on Foata normal form. 144/10312 useless extension candidates. Maximal degree in co-relation 52475. Up to 8973 conditions per place. [2024-06-14 11:39:05,004 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 156 selfloop transitions, 38 changer transitions 0/205 dead transitions. [2024-06-14 11:39:05,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 205 transitions, 1979 flow [2024-06-14 11:39:05,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:39:05,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:39:05,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 251 transitions. [2024-06-14 11:39:05,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6033653846153846 [2024-06-14 11:39:05,006 INFO L175 Difference]: Start difference. First operand has 119 places, 145 transitions, 1438 flow. Second operand 8 states and 251 transitions. [2024-06-14 11:39:05,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 205 transitions, 1979 flow [2024-06-14 11:39:05,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 205 transitions, 1844 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 11:39:05,276 INFO L231 Difference]: Finished difference. Result has 121 places, 146 transitions, 1378 flow [2024-06-14 11:39:05,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1263, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1378, PETRI_PLACES=121, PETRI_TRANSITIONS=146} [2024-06-14 11:39:05,276 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 66 predicate places. [2024-06-14 11:39:05,277 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 146 transitions, 1378 flow [2024-06-14 11:39:05,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:05,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:05,277 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 11:39:05,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 11:39:05,277 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:39:05,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:05,278 INFO L85 PathProgramCache]: Analyzing trace with hash -904215641, now seen corresponding path program 1 times [2024-06-14 11:39:05,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:05,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716012539] [2024-06-14 11:39:05,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:05,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:05,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:05,446 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 11:39:05,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:05,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716012539] [2024-06-14 11:39:05,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716012539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:05,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:05,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:39:05,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506952255] [2024-06-14 11:39:05,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:05,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:39:05,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:05,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:39:05,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:39:05,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-14 11:39:05,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 146 transitions, 1378 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:05,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:05,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-14 11:39:05,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:06,235 INFO L124 PetriNetUnfolderBase]: 5676/8381 cut-off events. [2024-06-14 11:39:06,235 INFO L125 PetriNetUnfolderBase]: For 138754/139003 co-relation queries the response was YES. [2024-06-14 11:39:06,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44545 conditions, 8381 events. 5676/8381 cut-off events. For 138754/139003 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 49240 event pairs, 2029 based on Foata normal form. 32/8386 useless extension candidates. Maximal degree in co-relation 44490. Up to 7824 conditions per place. [2024-06-14 11:39:06,304 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 132 selfloop transitions, 33 changer transitions 0/177 dead transitions. [2024-06-14 11:39:06,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 177 transitions, 1950 flow [2024-06-14 11:39:06,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:39:06,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:39:06,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-06-14 11:39:06,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-14 11:39:06,307 INFO L175 Difference]: Start difference. First operand has 121 places, 146 transitions, 1378 flow. Second operand 5 states and 160 transitions. [2024-06-14 11:39:06,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 177 transitions, 1950 flow [2024-06-14 11:39:06,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 177 transitions, 1861 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 11:39:06,451 INFO L231 Difference]: Finished difference. Result has 120 places, 154 transitions, 1472 flow [2024-06-14 11:39:06,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1472, PETRI_PLACES=120, PETRI_TRANSITIONS=154} [2024-06-14 11:39:06,451 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 65 predicate places. [2024-06-14 11:39:06,451 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 154 transitions, 1472 flow [2024-06-14 11:39:06,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:06,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:06,452 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 11:39:06,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 11:39:06,452 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:39:06,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:06,453 INFO L85 PathProgramCache]: Analyzing trace with hash -872699801, now seen corresponding path program 2 times [2024-06-14 11:39:06,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:06,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498209364] [2024-06-14 11:39:06,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:06,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:06,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:06,622 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 11:39:06,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:06,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498209364] [2024-06-14 11:39:06,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498209364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:06,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:06,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:39:06,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146467346] [2024-06-14 11:39:06,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:06,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:39:06,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:06,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:39:06,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:39:06,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-14 11:39:06,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 154 transitions, 1472 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:06,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:06,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-14 11:39:06,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:07,411 INFO L124 PetriNetUnfolderBase]: 5669/8372 cut-off events. [2024-06-14 11:39:07,412 INFO L125 PetriNetUnfolderBase]: For 154341/154602 co-relation queries the response was YES. [2024-06-14 11:39:07,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46125 conditions, 8372 events. 5669/8372 cut-off events. For 154341/154602 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 49085 event pairs, 2029 based on Foata normal form. 34/8380 useless extension candidates. Maximal degree in co-relation 46069. Up to 7826 conditions per place. [2024-06-14 11:39:07,480 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 130 selfloop transitions, 29 changer transitions 0/171 dead transitions. [2024-06-14 11:39:07,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 171 transitions, 1834 flow [2024-06-14 11:39:07,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:39:07,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:39:07,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-06-14 11:39:07,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-14 11:39:07,481 INFO L175 Difference]: Start difference. First operand has 120 places, 154 transitions, 1472 flow. Second operand 4 states and 132 transitions. [2024-06-14 11:39:07,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 171 transitions, 1834 flow [2024-06-14 11:39:07,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 171 transitions, 1741 flow, removed 36 selfloop flow, removed 1 redundant places. [2024-06-14 11:39:07,638 INFO L231 Difference]: Finished difference. Result has 123 places, 154 transitions, 1453 flow [2024-06-14 11:39:07,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1453, PETRI_PLACES=123, PETRI_TRANSITIONS=154} [2024-06-14 11:39:07,639 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 68 predicate places. [2024-06-14 11:39:07,639 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 154 transitions, 1453 flow [2024-06-14 11:39:07,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:07,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:07,640 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 11:39:07,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 11:39:07,640 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:39:07,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:07,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1863391521, now seen corresponding path program 1 times [2024-06-14 11:39:07,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:07,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984978363] [2024-06-14 11:39:07,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:07,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:07,808 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 11:39:07,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:07,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984978363] [2024-06-14 11:39:07,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984978363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:07,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:07,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:39:07,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847678098] [2024-06-14 11:39:07,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:07,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:39:07,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:07,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:39:07,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:39:07,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-14 11:39:07,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 154 transitions, 1453 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:07,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:07,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-14 11:39:07,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:08,629 INFO L124 PetriNetUnfolderBase]: 5840/8644 cut-off events. [2024-06-14 11:39:08,629 INFO L125 PetriNetUnfolderBase]: For 160629/160684 co-relation queries the response was YES. [2024-06-14 11:39:08,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45630 conditions, 8644 events. 5840/8644 cut-off events. For 160629/160684 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 51334 event pairs, 2282 based on Foata normal form. 63/8680 useless extension candidates. Maximal degree in co-relation 45572. Up to 7977 conditions per place. [2024-06-14 11:39:08,703 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 145 selfloop transitions, 17 changer transitions 0/177 dead transitions. [2024-06-14 11:39:08,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 177 transitions, 1857 flow [2024-06-14 11:39:08,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:39:08,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:39:08,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-14 11:39:08,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884615384615385 [2024-06-14 11:39:08,705 INFO L175 Difference]: Start difference. First operand has 123 places, 154 transitions, 1453 flow. Second operand 5 states and 153 transitions. [2024-06-14 11:39:08,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 177 transitions, 1857 flow [2024-06-14 11:39:08,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 177 transitions, 1799 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 11:39:08,842 INFO L231 Difference]: Finished difference. Result has 125 places, 157 transitions, 1469 flow [2024-06-14 11:39:08,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1395, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1469, PETRI_PLACES=125, PETRI_TRANSITIONS=157} [2024-06-14 11:39:08,842 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 70 predicate places. [2024-06-14 11:39:08,842 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 157 transitions, 1469 flow [2024-06-14 11:39:08,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:08,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:08,843 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 11:39:08,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 11:39:08,843 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:39:08,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:08,843 INFO L85 PathProgramCache]: Analyzing trace with hash 938080417, now seen corresponding path program 1 times [2024-06-14 11:39:08,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:08,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601468664] [2024-06-14 11:39:08,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:08,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:09,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:39:09,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:09,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601468664] [2024-06-14 11:39:09,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601468664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:09,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:09,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:39:09,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048501753] [2024-06-14 11:39:09,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:09,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:39:09,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:09,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:39:09,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:39:09,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-14 11:39:09,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 157 transitions, 1469 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:09,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:09,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-14 11:39:09,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:10,039 INFO L124 PetriNetUnfolderBase]: 7463/10909 cut-off events. [2024-06-14 11:39:10,039 INFO L125 PetriNetUnfolderBase]: For 207782/207797 co-relation queries the response was YES. [2024-06-14 11:39:10,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57863 conditions, 10909 events. 7463/10909 cut-off events. For 207782/207797 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 63540 event pairs, 2649 based on Foata normal form. 10/10913 useless extension candidates. Maximal degree in co-relation 57804. Up to 10181 conditions per place. [2024-06-14 11:39:10,124 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 179 selfloop transitions, 26 changer transitions 0/213 dead transitions. [2024-06-14 11:39:10,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 213 transitions, 2261 flow [2024-06-14 11:39:10,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:39:10,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:39:10,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-14 11:39:10,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5801282051282052 [2024-06-14 11:39:10,126 INFO L175 Difference]: Start difference. First operand has 125 places, 157 transitions, 1469 flow. Second operand 6 states and 181 transitions. [2024-06-14 11:39:10,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 213 transitions, 2261 flow [2024-06-14 11:39:10,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 213 transitions, 2204 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-14 11:39:10,379 INFO L231 Difference]: Finished difference. Result has 131 places, 180 transitions, 1722 flow [2024-06-14 11:39:10,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1419, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1722, PETRI_PLACES=131, PETRI_TRANSITIONS=180} [2024-06-14 11:39:10,379 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 76 predicate places. [2024-06-14 11:39:10,379 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 180 transitions, 1722 flow [2024-06-14 11:39:10,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:10,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:10,380 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 11:39:10,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 11:39:10,380 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:39:10,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:10,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1818957531, now seen corresponding path program 2 times [2024-06-14 11:39:10,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:10,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608595154] [2024-06-14 11:39:10,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:10,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:10,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:10,565 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 11:39:10,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:10,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608595154] [2024-06-14 11:39:10,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608595154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:10,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:10,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:39:10,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230941385] [2024-06-14 11:39:10,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:10,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:39:10,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:10,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:39:10,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:39:10,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-14 11:39:10,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 180 transitions, 1722 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:10,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:10,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-14 11:39:10,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:11,580 INFO L124 PetriNetUnfolderBase]: 7479/10933 cut-off events. [2024-06-14 11:39:11,580 INFO L125 PetriNetUnfolderBase]: For 226146/226150 co-relation queries the response was YES. [2024-06-14 11:39:11,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60286 conditions, 10933 events. 7479/10933 cut-off events. For 226146/226150 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 63806 event pairs, 2654 based on Foata normal form. 6/10932 useless extension candidates. Maximal degree in co-relation 60223. Up to 10198 conditions per place. [2024-06-14 11:39:11,679 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 171 selfloop transitions, 30 changer transitions 0/209 dead transitions. [2024-06-14 11:39:11,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 209 transitions, 2340 flow [2024-06-14 11:39:11,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:39:11,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:39:11,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-14 11:39:11,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5807692307692308 [2024-06-14 11:39:11,680 INFO L175 Difference]: Start difference. First operand has 131 places, 180 transitions, 1722 flow. Second operand 5 states and 151 transitions. [2024-06-14 11:39:11,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 209 transitions, 2340 flow [2024-06-14 11:39:11,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 209 transitions, 2308 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-14 11:39:11,931 INFO L231 Difference]: Finished difference. Result has 137 places, 186 transitions, 1831 flow [2024-06-14 11:39:11,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1694, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1831, PETRI_PLACES=137, PETRI_TRANSITIONS=186} [2024-06-14 11:39:11,931 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 82 predicate places. [2024-06-14 11:39:11,932 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 186 transitions, 1831 flow [2024-06-14 11:39:11,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:11,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:11,932 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 11:39:11,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 11:39:11,932 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:39:11,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:11,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1818946371, now seen corresponding path program 3 times [2024-06-14 11:39:11,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:11,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336595990] [2024-06-14 11:39:11,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:11,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:12,106 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 11:39:12,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:12,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336595990] [2024-06-14 11:39:12,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336595990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:12,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:12,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:39:12,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797510158] [2024-06-14 11:39:12,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:12,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:39:12,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:12,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:39:12,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:39:12,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-14 11:39:12,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 186 transitions, 1831 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:12,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:12,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-14 11:39:12,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:13,154 INFO L124 PetriNetUnfolderBase]: 7472/10926 cut-off events. [2024-06-14 11:39:13,154 INFO L125 PetriNetUnfolderBase]: For 241088/241114 co-relation queries the response was YES. [2024-06-14 11:39:13,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61040 conditions, 10926 events. 7472/10926 cut-off events. For 241088/241114 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 63774 event pairs, 2649 based on Foata normal form. 18/10938 useless extension candidates. Maximal degree in co-relation 60973. Up to 10191 conditions per place. [2024-06-14 11:39:13,254 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 173 selfloop transitions, 31 changer transitions 0/212 dead transitions. [2024-06-14 11:39:13,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 212 transitions, 2309 flow [2024-06-14 11:39:13,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:39:13,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:39:13,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-14 11:39:13,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-06-14 11:39:13,256 INFO L175 Difference]: Start difference. First operand has 137 places, 186 transitions, 1831 flow. Second operand 5 states and 155 transitions. [2024-06-14 11:39:13,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 212 transitions, 2309 flow [2024-06-14 11:39:13,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 212 transitions, 2249 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-14 11:39:13,587 INFO L231 Difference]: Finished difference. Result has 141 places, 186 transitions, 1847 flow [2024-06-14 11:39:13,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1771, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1847, PETRI_PLACES=141, PETRI_TRANSITIONS=186} [2024-06-14 11:39:13,588 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 86 predicate places. [2024-06-14 11:39:13,588 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 186 transitions, 1847 flow [2024-06-14 11:39:13,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:13,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:13,588 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 11:39:13,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 11:39:13,589 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:39:13,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:13,589 INFO L85 PathProgramCache]: Analyzing trace with hash 2145451239, now seen corresponding path program 1 times [2024-06-14 11:39:13,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:13,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536998825] [2024-06-14 11:39:13,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:13,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:13,898 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 11:39:13,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:13,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536998825] [2024-06-14 11:39:13,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536998825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:13,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:13,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:39:13,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063674860] [2024-06-14 11:39:13,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:13,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:39:13,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:13,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:39:13,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:39:13,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-14 11:39:13,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 186 transitions, 1847 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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 11:39:13,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:13,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-14 11:39:13,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:14,789 INFO L124 PetriNetUnfolderBase]: 6148/8991 cut-off events. [2024-06-14 11:39:14,789 INFO L125 PetriNetUnfolderBase]: For 216241/216248 co-relation queries the response was YES. [2024-06-14 11:39:14,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51954 conditions, 8991 events. 6148/8991 cut-off events. For 216241/216248 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 52057 event pairs, 2307 based on Foata normal form. 6/8992 useless extension candidates. Maximal degree in co-relation 51885. Up to 8422 conditions per place. [2024-06-14 11:39:14,873 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 190 selfloop transitions, 33 changer transitions 0/232 dead transitions. [2024-06-14 11:39:14,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 232 transitions, 2622 flow [2024-06-14 11:39:14,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:39:14,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:39:14,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-14 11:39:14,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5865384615384616 [2024-06-14 11:39:14,874 INFO L175 Difference]: Start difference. First operand has 141 places, 186 transitions, 1847 flow. Second operand 6 states and 183 transitions. [2024-06-14 11:39:14,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 232 transitions, 2622 flow [2024-06-14 11:39:15,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 232 transitions, 2574 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 11:39:15,115 INFO L231 Difference]: Finished difference. Result has 146 places, 203 transitions, 2061 flow [2024-06-14 11:39:15,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1803, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2061, PETRI_PLACES=146, PETRI_TRANSITIONS=203} [2024-06-14 11:39:15,116 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 91 predicate places. [2024-06-14 11:39:15,116 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 203 transitions, 2061 flow [2024-06-14 11:39:15,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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 11:39:15,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:15,116 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 11:39:15,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 11:39:15,117 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:39:15,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:15,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1283882509, now seen corresponding path program 2 times [2024-06-14 11:39:15,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:15,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201873166] [2024-06-14 11:39:15,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:15,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:15,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:15,302 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 11:39:15,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:15,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201873166] [2024-06-14 11:39:15,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201873166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:15,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:15,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:39:15,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003867291] [2024-06-14 11:39:15,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:15,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:39:15,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:15,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:39:15,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:39:15,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-14 11:39:15,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 203 transitions, 2061 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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 11:39:15,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:15,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-14 11:39:15,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:16,285 INFO L124 PetriNetUnfolderBase]: 6164/9018 cut-off events. [2024-06-14 11:39:16,286 INFO L125 PetriNetUnfolderBase]: For 221400/221410 co-relation queries the response was YES. [2024-06-14 11:39:16,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53716 conditions, 9018 events. 6164/9018 cut-off events. For 221400/221410 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 52072 event pairs, 2299 based on Foata normal form. 10/9024 useless extension candidates. Maximal degree in co-relation 53645. Up to 8457 conditions per place. [2024-06-14 11:39:16,373 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 199 selfloop transitions, 33 changer transitions 0/241 dead transitions. [2024-06-14 11:39:16,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 241 transitions, 2781 flow [2024-06-14 11:39:16,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:39:16,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:39:16,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-14 11:39:16,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5686813186813187 [2024-06-14 11:39:16,375 INFO L175 Difference]: Start difference. First operand has 146 places, 203 transitions, 2061 flow. Second operand 7 states and 207 transitions. [2024-06-14 11:39:16,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 241 transitions, 2781 flow [2024-06-14 11:39:16,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 241 transitions, 2697 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-14 11:39:16,653 INFO L231 Difference]: Finished difference. Result has 152 places, 209 transitions, 2127 flow [2024-06-14 11:39:16,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2127, PETRI_PLACES=152, PETRI_TRANSITIONS=209} [2024-06-14 11:39:16,654 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 97 predicate places. [2024-06-14 11:39:16,654 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 209 transitions, 2127 flow [2024-06-14 11:39:16,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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 11:39:16,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:16,654 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 11:39:16,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 11:39:16,654 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:39:16,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:16,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1283888089, now seen corresponding path program 3 times [2024-06-14 11:39:16,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:16,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540196047] [2024-06-14 11:39:16,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:16,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:16,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:16,838 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 11:39:16,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:16,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540196047] [2024-06-14 11:39:16,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540196047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:16,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:16,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:39:16,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837835542] [2024-06-14 11:39:16,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:16,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:39:16,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:16,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:39:16,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:39:16,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-14 11:39:16,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 209 transitions, 2127 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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 11:39:16,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:16,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-14 11:39:16,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:17,848 INFO L124 PetriNetUnfolderBase]: 6157/9008 cut-off events. [2024-06-14 11:39:17,848 INFO L125 PetriNetUnfolderBase]: For 233096/233106 co-relation queries the response was YES. [2024-06-14 11:39:17,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53818 conditions, 9008 events. 6157/9008 cut-off events. For 233096/233106 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 51929 event pairs, 2307 based on Foata normal form. 8/9011 useless extension candidates. Maximal degree in co-relation 53745. Up to 8450 conditions per place. [2024-06-14 11:39:17,947 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 191 selfloop transitions, 31 changer transitions 0/231 dead transitions. [2024-06-14 11:39:17,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 231 transitions, 2631 flow [2024-06-14 11:39:17,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:39:17,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:39:17,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2024-06-14 11:39:17,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 11:39:17,948 INFO L175 Difference]: Start difference. First operand has 152 places, 209 transitions, 2127 flow. Second operand 5 states and 156 transitions. [2024-06-14 11:39:17,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 231 transitions, 2631 flow [2024-06-14 11:39:18,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 231 transitions, 2521 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-14 11:39:18,209 INFO L231 Difference]: Finished difference. Result has 153 places, 209 transitions, 2088 flow [2024-06-14 11:39:18,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2017, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2088, PETRI_PLACES=153, PETRI_TRANSITIONS=209} [2024-06-14 11:39:18,210 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 98 predicate places. [2024-06-14 11:39:18,210 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 209 transitions, 2088 flow [2024-06-14 11:39:18,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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 11:39:18,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:18,210 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 11:39:18,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 11:39:18,210 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:39:18,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:18,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1298363159, now seen corresponding path program 1 times [2024-06-14 11:39:18,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:18,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615050992] [2024-06-14 11:39:18,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:18,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:18,370 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 11:39:18,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:18,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615050992] [2024-06-14 11:39:18,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615050992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:18,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:18,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:39:18,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647583115] [2024-06-14 11:39:18,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:18,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:39:18,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:18,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:39:18,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:39:18,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-14 11:39:18,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 209 transitions, 2088 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 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 11:39:18,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:18,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-14 11:39:18,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:19,430 INFO L124 PetriNetUnfolderBase]: 6897/10158 cut-off events. [2024-06-14 11:39:19,430 INFO L125 PetriNetUnfolderBase]: For 318594/318755 co-relation queries the response was YES. [2024-06-14 11:39:19,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62319 conditions, 10158 events. 6897/10158 cut-off events. For 318594/318755 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 60332 event pairs, 2392 based on Foata normal form. 45/9978 useless extension candidates. Maximal degree in co-relation 62245. Up to 9062 conditions per place. [2024-06-14 11:39:19,532 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 178 selfloop transitions, 18 changer transitions 0/239 dead transitions. [2024-06-14 11:39:19,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 239 transitions, 2726 flow [2024-06-14 11:39:19,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:39:19,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:39:19,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-06-14 11:39:19,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913461538461539 [2024-06-14 11:39:19,533 INFO L175 Difference]: Start difference. First operand has 153 places, 209 transitions, 2088 flow. Second operand 4 states and 123 transitions. [2024-06-14 11:39:19,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 239 transitions, 2726 flow [2024-06-14 11:39:19,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 239 transitions, 2656 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 11:39:19,991 INFO L231 Difference]: Finished difference. Result has 154 places, 226 transitions, 2311 flow [2024-06-14 11:39:19,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2026, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2311, PETRI_PLACES=154, PETRI_TRANSITIONS=226} [2024-06-14 11:39:19,992 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 99 predicate places. [2024-06-14 11:39:19,992 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 226 transitions, 2311 flow [2024-06-14 11:39:19,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 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 11:39:19,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:19,992 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 11:39:19,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 11:39:19,992 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:39:19,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:19,993 INFO L85 PathProgramCache]: Analyzing trace with hash 2081619046, now seen corresponding path program 1 times [2024-06-14 11:39:19,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:19,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265628303] [2024-06-14 11:39:19,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:19,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:19,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:20,184 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 11:39:20,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:20,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265628303] [2024-06-14 11:39:20,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265628303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:20,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:20,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:39:20,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223997173] [2024-06-14 11:39:20,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:20,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:39:20,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:20,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:39:20,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:39:20,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-14 11:39:20,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 226 transitions, 2311 flow. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:20,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:20,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-14 11:39:20,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:21,312 INFO L124 PetriNetUnfolderBase]: 6790/10088 cut-off events. [2024-06-14 11:39:21,312 INFO L125 PetriNetUnfolderBase]: For 343893/344483 co-relation queries the response was YES. [2024-06-14 11:39:21,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65929 conditions, 10088 events. 6790/10088 cut-off events. For 343893/344483 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 60365 event pairs, 2033 based on Foata normal form. 73/9793 useless extension candidates. Maximal degree in co-relation 65853. Up to 8986 conditions per place. [2024-06-14 11:39:21,414 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 176 selfloop transitions, 61 changer transitions 0/264 dead transitions. [2024-06-14 11:39:21,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 264 transitions, 3095 flow [2024-06-14 11:39:21,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:39:21,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:39:21,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-14 11:39:21,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6089743589743589 [2024-06-14 11:39:21,415 INFO L175 Difference]: Start difference. First operand has 154 places, 226 transitions, 2311 flow. Second operand 6 states and 190 transitions. [2024-06-14 11:39:21,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 264 transitions, 3095 flow [2024-06-14 11:39:21,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 264 transitions, 3075 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-14 11:39:21,784 INFO L231 Difference]: Finished difference. Result has 160 places, 232 transitions, 2539 flow [2024-06-14 11:39:21,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2291, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2539, PETRI_PLACES=160, PETRI_TRANSITIONS=232} [2024-06-14 11:39:21,785 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 105 predicate places. [2024-06-14 11:39:21,785 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 232 transitions, 2539 flow [2024-06-14 11:39:21,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:21,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:21,785 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 11:39:21,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 11:39:21,786 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:39:21,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:21,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1367779226, now seen corresponding path program 2 times [2024-06-14 11:39:21,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:21,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491080819] [2024-06-14 11:39:21,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:21,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:21,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:21,967 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 11:39:21,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:21,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491080819] [2024-06-14 11:39:21,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491080819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:21,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:21,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:39:21,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834423879] [2024-06-14 11:39:21,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:21,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:39:21,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:21,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:39:21,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:39:22,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-14 11:39:22,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 232 transitions, 2539 flow. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:22,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:22,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-14 11:39:22,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:23,180 INFO L124 PetriNetUnfolderBase]: 6847/10169 cut-off events. [2024-06-14 11:39:23,180 INFO L125 PetriNetUnfolderBase]: For 373860/374526 co-relation queries the response was YES. [2024-06-14 11:39:23,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68566 conditions, 10169 events. 6847/10169 cut-off events. For 373860/374526 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 60989 event pairs, 2199 based on Foata normal form. 58/9859 useless extension candidates. Maximal degree in co-relation 68487. Up to 9207 conditions per place. [2024-06-14 11:39:23,281 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 177 selfloop transitions, 57 changer transitions 0/261 dead transitions. [2024-06-14 11:39:23,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 261 transitions, 3135 flow [2024-06-14 11:39:23,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:39:23,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:39:23,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-14 11:39:23,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-14 11:39:23,282 INFO L175 Difference]: Start difference. First operand has 160 places, 232 transitions, 2539 flow. Second operand 6 states and 184 transitions. [2024-06-14 11:39:23,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 261 transitions, 3135 flow [2024-06-14 11:39:23,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 261 transitions, 2993 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-14 11:39:23,783 INFO L231 Difference]: Finished difference. Result has 164 places, 235 transitions, 2588 flow [2024-06-14 11:39:23,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2415, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2588, PETRI_PLACES=164, PETRI_TRANSITIONS=235} [2024-06-14 11:39:23,783 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 109 predicate places. [2024-06-14 11:39:23,783 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 235 transitions, 2588 flow [2024-06-14 11:39:23,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:23,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:23,784 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 11:39:23,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 11:39:23,784 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:39:23,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:23,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1145828058, now seen corresponding path program 3 times [2024-06-14 11:39:23,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:23,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266856178] [2024-06-14 11:39:23,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:23,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:23,991 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 11:39:23,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:23,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266856178] [2024-06-14 11:39:23,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266856178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:23,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:23,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:39:23,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190090521] [2024-06-14 11:39:23,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:23,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:39:23,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:23,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:39:23,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:39:24,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-14 11:39:24,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 235 transitions, 2588 flow. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:24,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:24,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-14 11:39:24,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:25,199 INFO L124 PetriNetUnfolderBase]: 6820/10134 cut-off events. [2024-06-14 11:39:25,199 INFO L125 PetriNetUnfolderBase]: For 388223/388881 co-relation queries the response was YES. [2024-06-14 11:39:25,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68388 conditions, 10134 events. 6820/10134 cut-off events. For 388223/388881 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 60715 event pairs, 2023 based on Foata normal form. 86/9854 useless extension candidates. Maximal degree in co-relation 68307. Up to 9124 conditions per place. [2024-06-14 11:39:25,310 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 180 selfloop transitions, 53 changer transitions 0/260 dead transitions. [2024-06-14 11:39:25,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 260 transitions, 3118 flow [2024-06-14 11:39:25,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:39:25,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:39:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-06-14 11:39:25,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6230769230769231 [2024-06-14 11:39:25,311 INFO L175 Difference]: Start difference. First operand has 164 places, 235 transitions, 2588 flow. Second operand 5 states and 162 transitions. [2024-06-14 11:39:25,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 260 transitions, 3118 flow [2024-06-14 11:39:25,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 260 transitions, 2957 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 11:39:25,872 INFO L231 Difference]: Finished difference. Result has 165 places, 235 transitions, 2547 flow [2024-06-14 11:39:25,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2427, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2547, PETRI_PLACES=165, PETRI_TRANSITIONS=235} [2024-06-14 11:39:25,873 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 110 predicate places. [2024-06-14 11:39:25,873 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 235 transitions, 2547 flow [2024-06-14 11:39:25,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:25,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:25,874 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 11:39:25,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 11:39:25,874 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:39:25,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:25,874 INFO L85 PathProgramCache]: Analyzing trace with hash 374736100, now seen corresponding path program 1 times [2024-06-14 11:39:25,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:25,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465193034] [2024-06-14 11:39:25,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:25,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:25,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:39:26,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:26,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465193034] [2024-06-14 11:39:26,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465193034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:26,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:26,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:26,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558207239] [2024-06-14 11:39:26,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:26,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:26,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:26,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:26,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:26,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-14 11:39:26,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 235 transitions, 2547 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:26,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:26,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-14 11:39:26,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:27,600 INFO L124 PetriNetUnfolderBase]: 7825/11383 cut-off events. [2024-06-14 11:39:27,600 INFO L125 PetriNetUnfolderBase]: For 374029/374053 co-relation queries the response was YES. [2024-06-14 11:39:27,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71024 conditions, 11383 events. 7825/11383 cut-off events. For 374029/374053 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 65983 event pairs, 2105 based on Foata normal form. 28/11406 useless extension candidates. Maximal degree in co-relation 70942. Up to 10367 conditions per place. [2024-06-14 11:39:27,700 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 247 selfloop transitions, 39 changer transitions 0/294 dead transitions. [2024-06-14 11:39:27,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 294 transitions, 3493 flow [2024-06-14 11:39:27,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:39:27,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:39:27,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-14 11:39:27,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5851648351648352 [2024-06-14 11:39:27,701 INFO L175 Difference]: Start difference. First operand has 165 places, 235 transitions, 2547 flow. Second operand 7 states and 213 transitions. [2024-06-14 11:39:27,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 294 transitions, 3493 flow [2024-06-14 11:39:28,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 294 transitions, 3376 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 11:39:28,128 INFO L231 Difference]: Finished difference. Result has 170 places, 245 transitions, 2637 flow [2024-06-14 11:39:28,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2430, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2637, PETRI_PLACES=170, PETRI_TRANSITIONS=245} [2024-06-14 11:39:28,135 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 115 predicate places. [2024-06-14 11:39:28,135 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 245 transitions, 2637 flow [2024-06-14 11:39:28,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:28,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:28,136 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 11:39:28,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 11:39:28,136 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:39:28,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:28,137 INFO L85 PathProgramCache]: Analyzing trace with hash 640433380, now seen corresponding path program 2 times [2024-06-14 11:39:28,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:28,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895063471] [2024-06-14 11:39:28,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:28,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:28,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:28,430 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 11:39:28,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:28,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895063471] [2024-06-14 11:39:28,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895063471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:28,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:28,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:28,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52753916] [2024-06-14 11:39:28,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:28,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:28,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:28,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:28,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:28,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-14 11:39:28,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 245 transitions, 2637 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:28,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:28,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-14 11:39:28,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:29,846 INFO L124 PetriNetUnfolderBase]: 8065/11719 cut-off events. [2024-06-14 11:39:29,846 INFO L125 PetriNetUnfolderBase]: For 406759/406783 co-relation queries the response was YES. [2024-06-14 11:39:29,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74650 conditions, 11719 events. 8065/11719 cut-off events. For 406759/406783 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 68121 event pairs, 2589 based on Foata normal form. 28/11742 useless extension candidates. Maximal degree in co-relation 74565. Up to 10803 conditions per place. [2024-06-14 11:39:29,975 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 251 selfloop transitions, 36 changer transitions 0/295 dead transitions. [2024-06-14 11:39:29,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 295 transitions, 3546 flow [2024-06-14 11:39:29,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:39:29,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:39:29,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-14 11:39:29,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-14 11:39:29,976 INFO L175 Difference]: Start difference. First operand has 170 places, 245 transitions, 2637 flow. Second operand 7 states and 210 transitions. [2024-06-14 11:39:29,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 295 transitions, 3546 flow [2024-06-14 11:39:30,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 295 transitions, 3494 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-14 11:39:30,616 INFO L231 Difference]: Finished difference. Result has 176 places, 251 transitions, 2745 flow [2024-06-14 11:39:30,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2589, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2745, PETRI_PLACES=176, PETRI_TRANSITIONS=251} [2024-06-14 11:39:30,617 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 121 predicate places. [2024-06-14 11:39:30,617 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 251 transitions, 2745 flow [2024-06-14 11:39:30,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:30,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:30,617 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 11:39:30,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 11:39:30,618 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:39:30,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:30,618 INFO L85 PathProgramCache]: Analyzing trace with hash 640759810, now seen corresponding path program 3 times [2024-06-14 11:39:30,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:30,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245196788] [2024-06-14 11:39:30,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:30,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:30,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:30,793 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 11:39:30,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:30,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245196788] [2024-06-14 11:39:30,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245196788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:30,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:30,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:30,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634205524] [2024-06-14 11:39:30,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:30,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:30,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:30,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:30,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:30,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-14 11:39:30,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 251 transitions, 2745 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:30,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:30,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-14 11:39:30,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:32,337 INFO L124 PetriNetUnfolderBase]: 8021/11659 cut-off events. [2024-06-14 11:39:32,337 INFO L125 PetriNetUnfolderBase]: For 421216/421240 co-relation queries the response was YES. [2024-06-14 11:39:32,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74749 conditions, 11659 events. 8021/11659 cut-off events. For 421216/421240 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 67755 event pairs, 2588 based on Foata normal form. 32/11686 useless extension candidates. Maximal degree in co-relation 74661. Up to 10866 conditions per place. [2024-06-14 11:39:32,442 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 250 selfloop transitions, 33 changer transitions 0/291 dead transitions. [2024-06-14 11:39:32,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 291 transitions, 3444 flow [2024-06-14 11:39:32,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:39:32,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:39:32,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-14 11:39:32,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5631868131868132 [2024-06-14 11:39:32,443 INFO L175 Difference]: Start difference. First operand has 176 places, 251 transitions, 2745 flow. Second operand 7 states and 205 transitions. [2024-06-14 11:39:32,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 291 transitions, 3444 flow [2024-06-14 11:39:33,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 291 transitions, 3398 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 11:39:33,038 INFO L231 Difference]: Finished difference. Result has 180 places, 252 transitions, 2789 flow [2024-06-14 11:39:33,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2701, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2789, PETRI_PLACES=180, PETRI_TRANSITIONS=252} [2024-06-14 11:39:33,038 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 125 predicate places. [2024-06-14 11:39:33,038 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 252 transitions, 2789 flow [2024-06-14 11:39:33,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:33,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:33,039 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 11:39:33,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 11:39:33,039 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:39:33,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:33,039 INFO L85 PathProgramCache]: Analyzing trace with hash 463273960, now seen corresponding path program 1 times [2024-06-14 11:39:33,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:33,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359093206] [2024-06-14 11:39:33,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:33,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:33,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:33,228 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 11:39:33,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:33,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359093206] [2024-06-14 11:39:33,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359093206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:33,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:33,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:33,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227184575] [2024-06-14 11:39:33,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:33,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:33,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:33,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:33,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:33,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-14 11:39:33,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 252 transitions, 2789 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:33,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:33,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-14 11:39:33,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:34,739 INFO L124 PetriNetUnfolderBase]: 7665/11275 cut-off events. [2024-06-14 11:39:34,739 INFO L125 PetriNetUnfolderBase]: For 482567/483436 co-relation queries the response was YES. [2024-06-14 11:39:34,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76756 conditions, 11275 events. 7665/11275 cut-off events. For 482567/483436 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 67541 event pairs, 2313 based on Foata normal form. 124/10980 useless extension candidates. Maximal degree in co-relation 76666. Up to 9935 conditions per place. [2024-06-14 11:39:34,865 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 184 selfloop transitions, 93 changer transitions 0/307 dead transitions. [2024-06-14 11:39:34,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 307 transitions, 3929 flow [2024-06-14 11:39:34,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:39:34,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:39:34,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2024-06-14 11:39:34,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6126373626373627 [2024-06-14 11:39:34,867 INFO L175 Difference]: Start difference. First operand has 180 places, 252 transitions, 2789 flow. Second operand 7 states and 223 transitions. [2024-06-14 11:39:34,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 307 transitions, 3929 flow [2024-06-14 11:39:35,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 307 transitions, 3865 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-14 11:39:35,694 INFO L231 Difference]: Finished difference. Result has 182 places, 264 transitions, 3120 flow [2024-06-14 11:39:35,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2725, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3120, PETRI_PLACES=182, PETRI_TRANSITIONS=264} [2024-06-14 11:39:35,695 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 127 predicate places. [2024-06-14 11:39:35,695 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 264 transitions, 3120 flow [2024-06-14 11:39:35,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:35,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:35,695 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 11:39:35,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 11:39:35,695 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:39:35,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:35,696 INFO L85 PathProgramCache]: Analyzing trace with hash 463394116, now seen corresponding path program 1 times [2024-06-14 11:39:35,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:35,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001029523] [2024-06-14 11:39:35,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:35,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:35,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:35,973 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 11:39:35,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:35,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001029523] [2024-06-14 11:39:35,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001029523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:35,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:35,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:35,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898528859] [2024-06-14 11:39:35,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:35,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:35,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:35,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:35,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:36,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-14 11:39:36,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 264 transitions, 3120 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:36,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:36,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-14 11:39:36,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:37,612 INFO L124 PetriNetUnfolderBase]: 8133/11891 cut-off events. [2024-06-14 11:39:37,612 INFO L125 PetriNetUnfolderBase]: For 468462/468500 co-relation queries the response was YES. [2024-06-14 11:39:37,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79128 conditions, 11891 events. 8133/11891 cut-off events. For 468462/468500 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 70067 event pairs, 2602 based on Foata normal form. 30/11914 useless extension candidates. Maximal degree in co-relation 79037. Up to 10882 conditions per place. [2024-06-14 11:39:37,733 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 263 selfloop transitions, 63 changer transitions 0/334 dead transitions. [2024-06-14 11:39:37,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 334 transitions, 4478 flow [2024-06-14 11:39:37,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:39:37,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:39:37,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-06-14 11:39:37,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5879120879120879 [2024-06-14 11:39:37,735 INFO L175 Difference]: Start difference. First operand has 182 places, 264 transitions, 3120 flow. Second operand 7 states and 214 transitions. [2024-06-14 11:39:37,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 334 transitions, 4478 flow [2024-06-14 11:39:38,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 334 transitions, 4332 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-14 11:39:38,490 INFO L231 Difference]: Finished difference. Result has 190 places, 289 transitions, 3466 flow [2024-06-14 11:39:38,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2982, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3466, PETRI_PLACES=190, PETRI_TRANSITIONS=289} [2024-06-14 11:39:38,493 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 135 predicate places. [2024-06-14 11:39:38,493 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 289 transitions, 3466 flow [2024-06-14 11:39:38,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:38,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:38,493 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 11:39:38,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 11:39:38,493 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:39:38,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:38,494 INFO L85 PathProgramCache]: Analyzing trace with hash 463393930, now seen corresponding path program 2 times [2024-06-14 11:39:38,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:38,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315551009] [2024-06-14 11:39:38,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:38,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:38,709 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 11:39:38,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:38,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315551009] [2024-06-14 11:39:38,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315551009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:38,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:38,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:38,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320211442] [2024-06-14 11:39:38,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:38,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:38,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:38,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:38,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:38,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-14 11:39:38,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 289 transitions, 3466 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:38,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:38,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-14 11:39:38,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:40,279 INFO L124 PetriNetUnfolderBase]: 7749/11408 cut-off events. [2024-06-14 11:39:40,279 INFO L125 PetriNetUnfolderBase]: For 550439/551718 co-relation queries the response was YES. [2024-06-14 11:39:40,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82498 conditions, 11408 events. 7749/11408 cut-off events. For 550439/551718 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 68558 event pairs, 2276 based on Foata normal form. 69/11103 useless extension candidates. Maximal degree in co-relation 82402. Up to 10234 conditions per place. [2024-06-14 11:39:40,422 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 215 selfloop transitions, 83 changer transitions 0/332 dead transitions. [2024-06-14 11:39:40,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 332 transitions, 4245 flow [2024-06-14 11:39:40,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:39:40,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:39:40,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-14 11:39:40,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5851648351648352 [2024-06-14 11:39:40,423 INFO L175 Difference]: Start difference. First operand has 190 places, 289 transitions, 3466 flow. Second operand 7 states and 213 transitions. [2024-06-14 11:39:40,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 332 transitions, 4245 flow [2024-06-14 11:39:41,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 332 transitions, 4163 flow, removed 32 selfloop flow, removed 1 redundant places. [2024-06-14 11:39:41,608 INFO L231 Difference]: Finished difference. Result has 196 places, 297 transitions, 3661 flow [2024-06-14 11:39:41,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3384, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3661, PETRI_PLACES=196, PETRI_TRANSITIONS=297} [2024-06-14 11:39:41,609 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 141 predicate places. [2024-06-14 11:39:41,609 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 297 transitions, 3661 flow [2024-06-14 11:39:41,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:41,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:41,609 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] [2024-06-14 11:39:41,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 11:39:41,610 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:39:41,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:41,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1489162500, now seen corresponding path program 2 times [2024-06-14 11:39:41,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:41,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75197875] [2024-06-14 11:39:41,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:41,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:41,781 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 11:39:41,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:41,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75197875] [2024-06-14 11:39:41,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75197875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:41,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:41,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:41,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701266689] [2024-06-14 11:39:41,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:41,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:41,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:41,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:41,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:41,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-14 11:39:41,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 297 transitions, 3661 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:41,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:41,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-14 11:39:41,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:43,379 INFO L124 PetriNetUnfolderBase]: 8257/12073 cut-off events. [2024-06-14 11:39:43,379 INFO L125 PetriNetUnfolderBase]: For 525198/525239 co-relation queries the response was YES. [2024-06-14 11:39:43,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83849 conditions, 12073 events. 8257/12073 cut-off events. For 525198/525239 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 71170 event pairs, 2602 based on Foata normal form. 33/12099 useless extension candidates. Maximal degree in co-relation 83751. Up to 11010 conditions per place. [2024-06-14 11:39:43,532 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 270 selfloop transitions, 81 changer transitions 0/359 dead transitions. [2024-06-14 11:39:43,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 359 transitions, 5049 flow [2024-06-14 11:39:43,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:39:43,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:39:43,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-14 11:39:43,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5796703296703297 [2024-06-14 11:39:43,552 INFO L175 Difference]: Start difference. First operand has 196 places, 297 transitions, 3661 flow. Second operand 7 states and 211 transitions. [2024-06-14 11:39:43,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 359 transitions, 5049 flow [2024-06-14 11:39:44,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 359 transitions, 4833 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 11:39:44,723 INFO L231 Difference]: Finished difference. Result has 201 places, 318 transitions, 3930 flow [2024-06-14 11:39:44,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3465, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3930, PETRI_PLACES=201, PETRI_TRANSITIONS=318} [2024-06-14 11:39:44,724 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 146 predicate places. [2024-06-14 11:39:44,724 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 318 transitions, 3930 flow [2024-06-14 11:39:44,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:44,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:44,724 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 11:39:44,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 11:39:44,725 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:39:44,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:44,725 INFO L85 PathProgramCache]: Analyzing trace with hash 640525636, now seen corresponding path program 3 times [2024-06-14 11:39:44,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:44,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20391369] [2024-06-14 11:39:44,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:44,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:44,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:44,927 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 11:39:44,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:44,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20391369] [2024-06-14 11:39:44,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20391369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:44,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:44,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:44,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590320142] [2024-06-14 11:39:44,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:44,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:44,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:44,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:44,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:44,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-14 11:39:44,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 318 transitions, 3930 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:44,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:44,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-14 11:39:44,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:46,496 INFO L124 PetriNetUnfolderBase]: 8250/12064 cut-off events. [2024-06-14 11:39:46,496 INFO L125 PetriNetUnfolderBase]: For 547545/547589 co-relation queries the response was YES. [2024-06-14 11:39:46,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84611 conditions, 12064 events. 8250/12064 cut-off events. For 547545/547589 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 71138 event pairs, 2602 based on Foata normal form. 35/12092 useless extension candidates. Maximal degree in co-relation 84510. Up to 11003 conditions per place. [2024-06-14 11:39:46,642 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 272 selfloop transitions, 79 changer transitions 0/359 dead transitions. [2024-06-14 11:39:46,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 359 transitions, 5074 flow [2024-06-14 11:39:46,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:39:46,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:39:46,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-14 11:39:46,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5824175824175825 [2024-06-14 11:39:46,646 INFO L175 Difference]: Start difference. First operand has 201 places, 318 transitions, 3930 flow. Second operand 7 states and 212 transitions. [2024-06-14 11:39:46,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 359 transitions, 5074 flow [2024-06-14 11:39:47,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 359 transitions, 4933 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-14 11:39:47,925 INFO L231 Difference]: Finished difference. Result has 206 places, 318 transitions, 3956 flow [2024-06-14 11:39:47,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3789, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3956, PETRI_PLACES=206, PETRI_TRANSITIONS=318} [2024-06-14 11:39:47,930 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 151 predicate places. [2024-06-14 11:39:47,931 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 318 transitions, 3956 flow [2024-06-14 11:39:47,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:47,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:47,931 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 11:39:47,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 11:39:47,931 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:39:47,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:47,932 INFO L85 PathProgramCache]: Analyzing trace with hash 640525450, now seen corresponding path program 3 times [2024-06-14 11:39:47,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:47,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295392549] [2024-06-14 11:39:47,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:47,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:48,147 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 11:39:48,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:48,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295392549] [2024-06-14 11:39:48,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295392549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:48,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:48,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:48,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007817020] [2024-06-14 11:39:48,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:48,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:48,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:48,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:48,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:48,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-14 11:39:48,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 318 transitions, 3956 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:48,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:48,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-14 11:39:48,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:49,810 INFO L124 PetriNetUnfolderBase]: 7893/11625 cut-off events. [2024-06-14 11:39:49,810 INFO L125 PetriNetUnfolderBase]: For 634160/635410 co-relation queries the response was YES. [2024-06-14 11:39:49,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86447 conditions, 11625 events. 7893/11625 cut-off events. For 634160/635410 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 70008 event pairs, 2277 based on Foata normal form. 71/11323 useless extension candidates. Maximal degree in co-relation 86345. Up to 10372 conditions per place. [2024-06-14 11:39:49,960 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 229 selfloop transitions, 108 changer transitions 0/376 dead transitions. [2024-06-14 11:39:49,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 376 transitions, 5158 flow [2024-06-14 11:39:49,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:39:49,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:39:49,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-14 11:39:49,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5697115384615384 [2024-06-14 11:39:49,961 INFO L175 Difference]: Start difference. First operand has 206 places, 318 transitions, 3956 flow. Second operand 8 states and 237 transitions. [2024-06-14 11:39:49,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 376 transitions, 5158 flow [2024-06-14 11:39:50,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 376 transitions, 5025 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 11:39:50,963 INFO L231 Difference]: Finished difference. Result has 213 places, 338 transitions, 4375 flow [2024-06-14 11:39:50,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3823, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4375, PETRI_PLACES=213, PETRI_TRANSITIONS=338} [2024-06-14 11:39:50,964 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 158 predicate places. [2024-06-14 11:39:50,964 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 338 transitions, 4375 flow [2024-06-14 11:39:50,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:50,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:50,964 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 11:39:50,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 11:39:50,965 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:39:50,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:50,965 INFO L85 PathProgramCache]: Analyzing trace with hash -44174910, now seen corresponding path program 4 times [2024-06-14 11:39:50,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:50,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480971151] [2024-06-14 11:39:50,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:50,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:50,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:51,166 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 11:39:51,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:51,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480971151] [2024-06-14 11:39:51,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480971151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:51,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:51,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:51,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534023713] [2024-06-14 11:39:51,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:51,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:51,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:51,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:51,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:51,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-14 11:39:51,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 338 transitions, 4375 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:51,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:51,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-14 11:39:51,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:52,816 INFO L124 PetriNetUnfolderBase]: 8426/12328 cut-off events. [2024-06-14 11:39:52,817 INFO L125 PetriNetUnfolderBase]: For 613585/613612 co-relation queries the response was YES. [2024-06-14 11:39:52,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87539 conditions, 12328 events. 8426/12328 cut-off events. For 613585/613612 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 72883 event pairs, 2565 based on Foata normal form. 34/12357 useless extension candidates. Maximal degree in co-relation 87434. Up to 11312 conditions per place. [2024-06-14 11:39:52,971 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 332 selfloop transitions, 35 changer transitions 0/375 dead transitions. [2024-06-14 11:39:52,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 375 transitions, 5248 flow [2024-06-14 11:39:52,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:39:52,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:39:52,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-14 11:39:52,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5801282051282052 [2024-06-14 11:39:52,972 INFO L175 Difference]: Start difference. First operand has 213 places, 338 transitions, 4375 flow. Second operand 6 states and 181 transitions. [2024-06-14 11:39:52,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 375 transitions, 5248 flow [2024-06-14 11:39:54,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 375 transitions, 5041 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-14 11:39:54,424 INFO L231 Difference]: Finished difference. Result has 216 places, 340 transitions, 4278 flow [2024-06-14 11:39:54,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4168, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4278, PETRI_PLACES=216, PETRI_TRANSITIONS=340} [2024-06-14 11:39:54,425 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 161 predicate places. [2024-06-14 11:39:54,425 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 340 transitions, 4278 flow [2024-06-14 11:39:54,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:54,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:54,426 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 11:39:54,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 11:39:54,426 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:39:54,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:54,427 INFO L85 PathProgramCache]: Analyzing trace with hash -44501340, now seen corresponding path program 5 times [2024-06-14 11:39:54,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:54,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155739974] [2024-06-14 11:39:54,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:54,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:54,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:54,725 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 11:39:54,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:54,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155739974] [2024-06-14 11:39:54,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155739974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:54,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:54,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:54,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552220510] [2024-06-14 11:39:54,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:54,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:54,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:54,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:54,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:54,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-14 11:39:54,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 340 transitions, 4278 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:54,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:54,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-14 11:39:54,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:56,463 INFO L124 PetriNetUnfolderBase]: 8497/12429 cut-off events. [2024-06-14 11:39:56,463 INFO L125 PetriNetUnfolderBase]: For 637327/637354 co-relation queries the response was YES. [2024-06-14 11:39:56,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88616 conditions, 12429 events. 8497/12429 cut-off events. For 637327/637354 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 73505 event pairs, 2087 based on Foata normal form. 30/12454 useless extension candidates. Maximal degree in co-relation 88511. Up to 10977 conditions per place. [2024-06-14 11:39:56,628 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 328 selfloop transitions, 50 changer transitions 0/386 dead transitions. [2024-06-14 11:39:56,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 386 transitions, 5384 flow [2024-06-14 11:39:56,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:39:56,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:39:56,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-14 11:39:56,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6057692307692307 [2024-06-14 11:39:56,629 INFO L175 Difference]: Start difference. First operand has 216 places, 340 transitions, 4278 flow. Second operand 6 states and 189 transitions. [2024-06-14 11:39:56,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 386 transitions, 5384 flow [2024-06-14 11:39:57,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 386 transitions, 5318 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 11:39:57,914 INFO L231 Difference]: Finished difference. Result has 219 places, 343 transitions, 4390 flow [2024-06-14 11:39:57,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4212, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4390, PETRI_PLACES=219, PETRI_TRANSITIONS=343} [2024-06-14 11:39:57,915 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 164 predicate places. [2024-06-14 11:39:57,915 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 343 transitions, 4390 flow [2024-06-14 11:39:57,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:57,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:57,915 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 11:39:57,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 11:39:57,916 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:39:57,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:57,916 INFO L85 PathProgramCache]: Analyzing trace with hash -33450150, now seen corresponding path program 6 times [2024-06-14 11:39:57,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:57,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837734726] [2024-06-14 11:39:57,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:57,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:57,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:58,112 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 11:39:58,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:58,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837734726] [2024-06-14 11:39:58,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837734726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:58,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:58,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:58,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868423123] [2024-06-14 11:39:58,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:58,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:58,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:58,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:58,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:58,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-14 11:39:58,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 343 transitions, 4390 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:58,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:58,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-14 11:39:58,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:59,995 INFO L124 PetriNetUnfolderBase]: 8453/12366 cut-off events. [2024-06-14 11:39:59,995 INFO L125 PetriNetUnfolderBase]: For 655158/655160 co-relation queries the response was YES. [2024-06-14 11:40:00,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88840 conditions, 12366 events. 8453/12366 cut-off events. For 655158/655160 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 73181 event pairs, 2577 based on Foata normal form. 18/12377 useless extension candidates. Maximal degree in co-relation 88733. Up to 11445 conditions per place. [2024-06-14 11:40:00,158 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 332 selfloop transitions, 33 changer transitions 0/373 dead transitions. [2024-06-14 11:40:00,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 373 transitions, 5237 flow [2024-06-14 11:40:00,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:40:00,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:40:00,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-14 11:40:00,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608974358974359 [2024-06-14 11:40:00,162 INFO L175 Difference]: Start difference. First operand has 219 places, 343 transitions, 4390 flow. Second operand 6 states and 175 transitions. [2024-06-14 11:40:00,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 373 transitions, 5237 flow [2024-06-14 11:40:01,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 373 transitions, 5135 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 11:40:01,330 INFO L231 Difference]: Finished difference. Result has 220 places, 344 transitions, 4382 flow [2024-06-14 11:40:01,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4291, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4382, PETRI_PLACES=220, PETRI_TRANSITIONS=344} [2024-06-14 11:40:01,331 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 165 predicate places. [2024-06-14 11:40:01,331 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 344 transitions, 4382 flow [2024-06-14 11:40:01,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:01,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:01,331 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 11:40:01,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 11:40:01,335 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:40:01,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:01,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1957468184, now seen corresponding path program 4 times [2024-06-14 11:40:01,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:01,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025242072] [2024-06-14 11:40:01,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:01,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:01,526 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 11:40:01,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:01,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025242072] [2024-06-14 11:40:01,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025242072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:01,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:01,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:01,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850185121] [2024-06-14 11:40:01,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:01,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:01,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:01,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:01,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:01,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-14 11:40:01,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 344 transitions, 4382 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:01,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:01,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-14 11:40:01,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:03,243 INFO L124 PetriNetUnfolderBase]: 8051/11860 cut-off events. [2024-06-14 11:40:03,243 INFO L125 PetriNetUnfolderBase]: For 681776/683116 co-relation queries the response was YES. [2024-06-14 11:40:03,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88871 conditions, 11860 events. 8051/11860 cut-off events. For 681776/683116 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 71532 event pairs, 2317 based on Foata normal form. 115/11581 useless extension candidates. Maximal degree in co-relation 88765. Up to 10471 conditions per place. [2024-06-14 11:40:03,411 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 242 selfloop transitions, 104 changer transitions 0/388 dead transitions. [2024-06-14 11:40:03,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 388 transitions, 5646 flow [2024-06-14 11:40:03,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:40:03,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:40:03,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-14 11:40:03,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6217948717948718 [2024-06-14 11:40:03,413 INFO L175 Difference]: Start difference. First operand has 220 places, 344 transitions, 4382 flow. Second operand 6 states and 194 transitions. [2024-06-14 11:40:03,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 388 transitions, 5646 flow [2024-06-14 11:40:04,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 388 transitions, 5574 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 11:40:04,575 INFO L231 Difference]: Finished difference. Result has 222 places, 352 transitions, 4667 flow [2024-06-14 11:40:04,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4310, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4667, PETRI_PLACES=222, PETRI_TRANSITIONS=352} [2024-06-14 11:40:04,576 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 167 predicate places. [2024-06-14 11:40:04,576 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 352 transitions, 4667 flow [2024-06-14 11:40:04,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:04,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:04,576 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 11:40:04,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 11:40:04,577 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:40:04,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:04,577 INFO L85 PathProgramCache]: Analyzing trace with hash -368910168, now seen corresponding path program 5 times [2024-06-14 11:40:04,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:04,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972006234] [2024-06-14 11:40:04,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:04,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:04,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:04,772 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 11:40:04,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:04,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972006234] [2024-06-14 11:40:04,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972006234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:04,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:04,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:04,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614404038] [2024-06-14 11:40:04,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:04,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:04,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:04,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:04,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:04,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-14 11:40:04,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 352 transitions, 4667 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:04,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:04,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-14 11:40:04,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:06,504 INFO L124 PetriNetUnfolderBase]: 8051/11864 cut-off events. [2024-06-14 11:40:06,504 INFO L125 PetriNetUnfolderBase]: For 709896/711310 co-relation queries the response was YES. [2024-06-14 11:40:06,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89540 conditions, 11864 events. 8051/11864 cut-off events. For 709896/711310 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 71570 event pairs, 2286 based on Foata normal form. 96/11587 useless extension candidates. Maximal degree in co-relation 89433. Up to 10665 conditions per place. [2024-06-14 11:40:06,647 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 261 selfloop transitions, 77 changer transitions 0/380 dead transitions. [2024-06-14 11:40:06,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 380 transitions, 5415 flow [2024-06-14 11:40:06,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:40:06,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:40:06,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-14 11:40:06,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592948717948718 [2024-06-14 11:40:06,648 INFO L175 Difference]: Start difference. First operand has 222 places, 352 transitions, 4667 flow. Second operand 6 states and 185 transitions. [2024-06-14 11:40:06,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 380 transitions, 5415 flow [2024-06-14 11:40:08,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 380 transitions, 5129 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-14 11:40:08,141 INFO L231 Difference]: Finished difference. Result has 225 places, 352 transitions, 4545 flow [2024-06-14 11:40:08,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4381, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4545, PETRI_PLACES=225, PETRI_TRANSITIONS=352} [2024-06-14 11:40:08,142 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 170 predicate places. [2024-06-14 11:40:08,142 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 352 transitions, 4545 flow [2024-06-14 11:40:08,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:08,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:08,142 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] [2024-06-14 11:40:08,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 11:40:08,143 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:40:08,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:08,143 INFO L85 PathProgramCache]: Analyzing trace with hash -368909982, now seen corresponding path program 4 times [2024-06-14 11:40:08,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:08,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13721700] [2024-06-14 11:40:08,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:08,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:08,333 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 11:40:08,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:08,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13721700] [2024-06-14 11:40:08,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13721700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:08,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:08,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:08,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434104367] [2024-06-14 11:40:08,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:08,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:08,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:08,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:08,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:08,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-14 11:40:08,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 352 transitions, 4545 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:08,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:08,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-14 11:40:08,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:10,109 INFO L124 PetriNetUnfolderBase]: 8492/12420 cut-off events. [2024-06-14 11:40:10,109 INFO L125 PetriNetUnfolderBase]: For 665119/665163 co-relation queries the response was YES. [2024-06-14 11:40:10,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89127 conditions, 12420 events. 8492/12420 cut-off events. For 665119/665163 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 73543 event pairs, 2614 based on Foata normal form. 35/12448 useless extension candidates. Maximal degree in co-relation 89019. Up to 11426 conditions per place. [2024-06-14 11:40:10,273 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 321 selfloop transitions, 57 changer transitions 0/386 dead transitions. [2024-06-14 11:40:10,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 386 transitions, 5583 flow [2024-06-14 11:40:10,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:40:10,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:40:10,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-14 11:40:10,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592948717948718 [2024-06-14 11:40:10,274 INFO L175 Difference]: Start difference. First operand has 225 places, 352 transitions, 4545 flow. Second operand 6 states and 185 transitions. [2024-06-14 11:40:10,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 386 transitions, 5583 flow [2024-06-14 11:40:11,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 386 transitions, 5359 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 11:40:11,678 INFO L231 Difference]: Finished difference. Result has 225 places, 352 transitions, 4451 flow [2024-06-14 11:40:11,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4323, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4451, PETRI_PLACES=225, PETRI_TRANSITIONS=352} [2024-06-14 11:40:11,678 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 170 predicate places. [2024-06-14 11:40:11,678 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 352 transitions, 4451 flow [2024-06-14 11:40:11,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:11,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:11,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:40:11,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 11:40:11,679 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:40:11,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:11,679 INFO L85 PathProgramCache]: Analyzing trace with hash -363667758, now seen corresponding path program 6 times [2024-06-14 11:40:11,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:11,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683627406] [2024-06-14 11:40:11,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:11,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:11,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:11,867 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 11:40:11,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:11,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683627406] [2024-06-14 11:40:11,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683627406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:11,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:11,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:11,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538766824] [2024-06-14 11:40:11,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:11,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:11,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:11,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:11,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:11,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-14 11:40:11,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 352 transitions, 4451 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:11,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:11,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-14 11:40:11,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:13,536 INFO L124 PetriNetUnfolderBase]: 8050/11869 cut-off events. [2024-06-14 11:40:13,536 INFO L125 PetriNetUnfolderBase]: For 760615/761977 co-relation queries the response was YES. [2024-06-14 11:40:13,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90219 conditions, 11869 events. 8050/11869 cut-off events. For 760615/761977 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 71717 event pairs, 2286 based on Foata normal form. 132/11628 useless extension candidates. Maximal degree in co-relation 90111. Up to 10477 conditions per place. [2024-06-14 11:40:13,679 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 248 selfloop transitions, 116 changer transitions 0/406 dead transitions. [2024-06-14 11:40:13,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 406 transitions, 5733 flow [2024-06-14 11:40:13,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:40:13,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:40:13,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 251 transitions. [2024-06-14 11:40:13,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6033653846153846 [2024-06-14 11:40:13,680 INFO L175 Difference]: Start difference. First operand has 225 places, 352 transitions, 4451 flow. Second operand 8 states and 251 transitions. [2024-06-14 11:40:13,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 406 transitions, 5733 flow [2024-06-14 11:40:15,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 406 transitions, 5583 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 11:40:15,327 INFO L231 Difference]: Finished difference. Result has 228 places, 356 transitions, 4604 flow [2024-06-14 11:40:15,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4301, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4604, PETRI_PLACES=228, PETRI_TRANSITIONS=356} [2024-06-14 11:40:15,328 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 173 predicate places. [2024-06-14 11:40:15,328 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 356 transitions, 4604 flow [2024-06-14 11:40:15,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:15,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:15,328 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 11:40:15,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 11:40:15,329 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:40:15,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:15,329 INFO L85 PathProgramCache]: Analyzing trace with hash -363369228, now seen corresponding path program 7 times [2024-06-14 11:40:15,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:15,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293750500] [2024-06-14 11:40:15,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:15,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:15,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:15,533 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 11:40:15,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:15,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293750500] [2024-06-14 11:40:15,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293750500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:15,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:15,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:15,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691156083] [2024-06-14 11:40:15,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:15,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:15,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:15,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:15,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:15,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-14 11:40:15,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 356 transitions, 4604 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:15,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:15,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-14 11:40:15,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:17,333 INFO L124 PetriNetUnfolderBase]: 8080/11913 cut-off events. [2024-06-14 11:40:17,334 INFO L125 PetriNetUnfolderBase]: For 792289/793698 co-relation queries the response was YES. [2024-06-14 11:40:17,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91443 conditions, 11913 events. 8080/11913 cut-off events. For 792289/793698 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 71964 event pairs, 2285 based on Foata normal form. 187/11727 useless extension candidates. Maximal degree in co-relation 91334. Up to 10509 conditions per place. [2024-06-14 11:40:17,520 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 245 selfloop transitions, 123 changer transitions 0/410 dead transitions. [2024-06-14 11:40:17,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 410 transitions, 5726 flow [2024-06-14 11:40:17,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:40:17,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:40:17,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 271 transitions. [2024-06-14 11:40:17,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5790598290598291 [2024-06-14 11:40:17,521 INFO L175 Difference]: Start difference. First operand has 228 places, 356 transitions, 4604 flow. Second operand 9 states and 271 transitions. [2024-06-14 11:40:17,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 410 transitions, 5726 flow [2024-06-14 11:40:19,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 410 transitions, 5381 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 11:40:19,774 INFO L231 Difference]: Finished difference. Result has 231 places, 360 transitions, 4585 flow [2024-06-14 11:40:19,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4277, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4585, PETRI_PLACES=231, PETRI_TRANSITIONS=360} [2024-06-14 11:40:19,775 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 176 predicate places. [2024-06-14 11:40:19,775 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 360 transitions, 4585 flow [2024-06-14 11:40:19,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:19,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:19,775 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 11:40:19,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 11:40:19,776 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:40:19,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:19,776 INFO L85 PathProgramCache]: Analyzing trace with hash 613616418, now seen corresponding path program 5 times [2024-06-14 11:40:19,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:19,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704402641] [2024-06-14 11:40:19,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:19,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:19,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:20,009 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 11:40:20,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:20,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704402641] [2024-06-14 11:40:20,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704402641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:20,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:20,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:20,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534261476] [2024-06-14 11:40:20,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:20,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:20,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:20,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:20,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:20,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-14 11:40:20,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 360 transitions, 4585 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:20,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:20,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-14 11:40:20,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:21,796 INFO L124 PetriNetUnfolderBase]: 8554/12518 cut-off events. [2024-06-14 11:40:21,796 INFO L125 PetriNetUnfolderBase]: For 746077/746121 co-relation queries the response was YES. [2024-06-14 11:40:21,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91580 conditions, 12518 events. 8554/12518 cut-off events. For 746077/746121 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 74252 event pairs, 2613 based on Foata normal form. 35/12546 useless extension candidates. Maximal degree in co-relation 91470. Up to 11503 conditions per place. [2024-06-14 11:40:21,989 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 325 selfloop transitions, 61 changer transitions 0/394 dead transitions. [2024-06-14 11:40:21,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 394 transitions, 5700 flow [2024-06-14 11:40:21,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:40:21,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:40:21,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-06-14 11:40:21,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-14 11:40:21,991 INFO L175 Difference]: Start difference. First operand has 231 places, 360 transitions, 4585 flow. Second operand 5 states and 160 transitions. [2024-06-14 11:40:21,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 394 transitions, 5700 flow [2024-06-14 11:40:23,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 394 transitions, 5456 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 11:40:23,960 INFO L231 Difference]: Finished difference. Result has 231 places, 365 transitions, 4594 flow [2024-06-14 11:40:23,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4343, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4594, PETRI_PLACES=231, PETRI_TRANSITIONS=365} [2024-06-14 11:40:23,960 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 176 predicate places. [2024-06-14 11:40:23,960 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 365 transitions, 4594 flow [2024-06-14 11:40:23,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:23,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:23,961 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 11:40:23,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 11:40:23,961 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:40:23,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:23,961 INFO L85 PathProgramCache]: Analyzing trace with hash 613627578, now seen corresponding path program 6 times [2024-06-14 11:40:23,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:23,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487503051] [2024-06-14 11:40:23,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:23,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:24,144 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 11:40:24,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:24,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487503051] [2024-06-14 11:40:24,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487503051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:24,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:24,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:24,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467752223] [2024-06-14 11:40:24,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:24,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:24,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:24,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:24,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:24,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-14 11:40:24,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 365 transitions, 4594 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:24,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:24,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-14 11:40:24,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:26,040 INFO L124 PetriNetUnfolderBase]: 8547/12510 cut-off events. [2024-06-14 11:40:26,041 INFO L125 PetriNetUnfolderBase]: For 771991/772035 co-relation queries the response was YES. [2024-06-14 11:40:26,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91934 conditions, 12510 events. 8547/12510 cut-off events. For 771991/772035 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 74112 event pairs, 2597 based on Foata normal form. 37/12541 useless extension candidates. Maximal degree in co-relation 91822. Up to 11496 conditions per place. [2024-06-14 11:40:26,257 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 327 selfloop transitions, 66 changer transitions 0/401 dead transitions. [2024-06-14 11:40:26,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 401 transitions, 5493 flow [2024-06-14 11:40:26,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:40:26,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:40:26,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-14 11:40:26,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5686813186813187 [2024-06-14 11:40:26,259 INFO L175 Difference]: Start difference. First operand has 231 places, 365 transitions, 4594 flow. Second operand 7 states and 207 transitions. [2024-06-14 11:40:26,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 401 transitions, 5493 flow [2024-06-14 11:40:28,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 401 transitions, 5357 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-14 11:40:28,304 INFO L231 Difference]: Finished difference. Result has 234 places, 366 transitions, 4620 flow [2024-06-14 11:40:28,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4461, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4620, PETRI_PLACES=234, PETRI_TRANSITIONS=366} [2024-06-14 11:40:28,304 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 179 predicate places. [2024-06-14 11:40:28,305 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 366 transitions, 4620 flow [2024-06-14 11:40:28,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:28,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:28,305 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 11:40:28,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 11:40:28,305 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:40:28,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:28,306 INFO L85 PathProgramCache]: Analyzing trace with hash 613616232, now seen corresponding path program 8 times [2024-06-14 11:40:28,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:28,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148461528] [2024-06-14 11:40:28,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:28,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:28,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:28,499 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 11:40:28,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:28,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148461528] [2024-06-14 11:40:28,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148461528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:28,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:28,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:28,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913432469] [2024-06-14 11:40:28,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:28,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:28,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:28,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:28,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:28,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-14 11:40:28,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 366 transitions, 4620 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:28,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:28,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-14 11:40:28,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:30,325 INFO L124 PetriNetUnfolderBase]: 8080/11923 cut-off events. [2024-06-14 11:40:30,326 INFO L125 PetriNetUnfolderBase]: For 814433/815818 co-relation queries the response was YES. [2024-06-14 11:40:30,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91635 conditions, 11923 events. 8080/11923 cut-off events. For 814433/815818 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 72179 event pairs, 2284 based on Foata normal form. 128/11678 useless extension candidates. Maximal degree in co-relation 91524. Up to 10568 conditions per place. [2024-06-14 11:40:30,487 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 261 selfloop transitions, 105 changer transitions 0/410 dead transitions. [2024-06-14 11:40:30,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 410 transitions, 5656 flow [2024-06-14 11:40:30,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:40:30,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:40:30,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 224 transitions. [2024-06-14 11:40:30,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-14 11:40:30,488 INFO L175 Difference]: Start difference. First operand has 234 places, 366 transitions, 4620 flow. Second operand 7 states and 224 transitions. [2024-06-14 11:40:30,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 410 transitions, 5656 flow [2024-06-14 11:40:32,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 410 transitions, 5475 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 11:40:32,433 INFO L231 Difference]: Finished difference. Result has 235 places, 366 transitions, 4675 flow [2024-06-14 11:40:32,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4443, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4675, PETRI_PLACES=235, PETRI_TRANSITIONS=366} [2024-06-14 11:40:32,434 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 180 predicate places. [2024-06-14 11:40:32,434 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 366 transitions, 4675 flow [2024-06-14 11:40:32,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:32,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:32,434 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 11:40:32,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 11:40:32,435 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:40:32,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:32,435 INFO L85 PathProgramCache]: Analyzing trace with hash 613621812, now seen corresponding path program 9 times [2024-06-14 11:40:32,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:32,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365362060] [2024-06-14 11:40:32,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:32,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:32,618 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 11:40:32,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:32,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365362060] [2024-06-14 11:40:32,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365362060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:32,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:32,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:32,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282372806] [2024-06-14 11:40:32,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:32,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:32,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:32,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:32,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:32,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-14 11:40:32,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 366 transitions, 4675 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:32,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:32,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-14 11:40:32,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:34,537 INFO L124 PetriNetUnfolderBase]: 8062/11897 cut-off events. [2024-06-14 11:40:34,537 INFO L125 PetriNetUnfolderBase]: For 809384/810758 co-relation queries the response was YES. [2024-06-14 11:40:34,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91387 conditions, 11897 events. 8062/11897 cut-off events. For 809384/810758 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 72008 event pairs, 2284 based on Foata normal form. 128/11652 useless extension candidates. Maximal degree in co-relation 91276. Up to 10549 conditions per place. [2024-06-14 11:40:34,699 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 252 selfloop transitions, 105 changer transitions 0/401 dead transitions. [2024-06-14 11:40:34,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 401 transitions, 5481 flow [2024-06-14 11:40:34,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:40:34,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:40:34,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-14 11:40:34,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6217948717948718 [2024-06-14 11:40:34,700 INFO L175 Difference]: Start difference. First operand has 235 places, 366 transitions, 4675 flow. Second operand 6 states and 194 transitions. [2024-06-14 11:40:34,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 401 transitions, 5481 flow [2024-06-14 11:40:36,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 401 transitions, 5191 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-14 11:40:36,577 INFO L231 Difference]: Finished difference. Result has 232 places, 366 transitions, 4611 flow [2024-06-14 11:40:36,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4385, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4611, PETRI_PLACES=232, PETRI_TRANSITIONS=366} [2024-06-14 11:40:36,578 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 177 predicate places. [2024-06-14 11:40:36,578 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 366 transitions, 4611 flow [2024-06-14 11:40:36,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:36,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:36,578 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 11:40:36,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 11:40:36,579 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:40:36,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:36,579 INFO L85 PathProgramCache]: Analyzing trace with hash -44171934, now seen corresponding path program 7 times [2024-06-14 11:40:36,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:36,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694597018] [2024-06-14 11:40:36,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:36,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:36,770 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 11:40:36,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:36,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694597018] [2024-06-14 11:40:36,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694597018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:36,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:36,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:36,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920798085] [2024-06-14 11:40:36,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:36,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:36,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:36,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:36,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:36,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-14 11:40:36,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 366 transitions, 4611 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:36,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:36,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-14 11:40:36,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:38,551 INFO L124 PetriNetUnfolderBase]: 8564/12537 cut-off events. [2024-06-14 11:40:38,552 INFO L125 PetriNetUnfolderBase]: For 712412/712456 co-relation queries the response was YES. [2024-06-14 11:40:38,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90702 conditions, 12537 events. 8564/12537 cut-off events. For 712412/712456 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 74370 event pairs, 2612 based on Foata normal form. 35/12565 useless extension candidates. Maximal degree in co-relation 90592. Up to 11419 conditions per place. [2024-06-14 11:40:38,709 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 307 selfloop transitions, 95 changer transitions 0/410 dead transitions. [2024-06-14 11:40:38,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 410 transitions, 5994 flow [2024-06-14 11:40:38,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:40:38,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:40:38,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-14 11:40:38,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-06-14 11:40:38,710 INFO L175 Difference]: Start difference. First operand has 232 places, 366 transitions, 4611 flow. Second operand 6 states and 186 transitions. [2024-06-14 11:40:38,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 410 transitions, 5994 flow [2024-06-14 11:40:40,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 410 transitions, 5766 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 11:40:40,532 INFO L231 Difference]: Finished difference. Result has 233 places, 375 transitions, 4756 flow [2024-06-14 11:40:40,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4391, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4756, PETRI_PLACES=233, PETRI_TRANSITIONS=375} [2024-06-14 11:40:40,533 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 178 predicate places. [2024-06-14 11:40:40,533 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 375 transitions, 4756 flow [2024-06-14 11:40:40,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:40,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:40,534 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] [2024-06-14 11:40:40,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 11:40:40,534 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:40:40,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:40,538 INFO L85 PathProgramCache]: Analyzing trace with hash -44409270, now seen corresponding path program 10 times [2024-06-14 11:40:40,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:40,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389955117] [2024-06-14 11:40:40,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:40,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:40,728 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 11:40:40,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:40,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389955117] [2024-06-14 11:40:40,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389955117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:40,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:40,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:40,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861274052] [2024-06-14 11:40:40,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:40,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:40,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:40,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:40,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:40,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-14 11:40:40,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 375 transitions, 4756 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:40,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:40,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-14 11:40:40,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:42,539 INFO L124 PetriNetUnfolderBase]: 8092/11941 cut-off events. [2024-06-14 11:40:42,540 INFO L125 PetriNetUnfolderBase]: For 778201/779572 co-relation queries the response was YES. [2024-06-14 11:40:42,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91128 conditions, 11941 events. 8092/11941 cut-off events. For 778201/779572 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 72325 event pairs, 2283 based on Foata normal form. 151/11719 useless extension candidates. Maximal degree in co-relation 91017. Up to 10484 conditions per place. [2024-06-14 11:40:42,689 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 231 selfloop transitions, 147 changer transitions 0/424 dead transitions. [2024-06-14 11:40:42,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 424 transitions, 5640 flow [2024-06-14 11:40:42,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:40:42,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:40:42,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 251 transitions. [2024-06-14 11:40:42,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6033653846153846 [2024-06-14 11:40:42,690 INFO L175 Difference]: Start difference. First operand has 233 places, 375 transitions, 4756 flow. Second operand 8 states and 251 transitions. [2024-06-14 11:40:42,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 424 transitions, 5640 flow [2024-06-14 11:40:44,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 424 transitions, 5475 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-14 11:40:44,239 INFO L231 Difference]: Finished difference. Result has 238 places, 375 transitions, 4913 flow [2024-06-14 11:40:44,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4591, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4913, PETRI_PLACES=238, PETRI_TRANSITIONS=375} [2024-06-14 11:40:44,239 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 183 predicate places. [2024-06-14 11:40:44,239 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 375 transitions, 4913 flow [2024-06-14 11:40:44,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:44,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:44,240 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] [2024-06-14 11:40:44,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 11:40:44,240 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:40:44,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:44,240 INFO L85 PathProgramCache]: Analyzing trace with hash -44409084, now seen corresponding path program 8 times [2024-06-14 11:40:44,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:44,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012455135] [2024-06-14 11:40:44,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:44,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:44,425 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 11:40:44,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:44,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012455135] [2024-06-14 11:40:44,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012455135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:44,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:44,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:44,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652563295] [2024-06-14 11:40:44,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:44,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:44,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:44,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:44,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:44,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-14 11:40:44,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 375 transitions, 4913 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:44,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:44,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-14 11:40:44,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:46,274 INFO L124 PetriNetUnfolderBase]: 8546/12514 cut-off events. [2024-06-14 11:40:46,274 INFO L125 PetriNetUnfolderBase]: For 708568/708612 co-relation queries the response was YES. [2024-06-14 11:40:46,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90743 conditions, 12514 events. 8546/12514 cut-off events. For 708568/708612 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 74313 event pairs, 2611 based on Foata normal form. 35/12542 useless extension candidates. Maximal degree in co-relation 90632. Up to 11398 conditions per place. [2024-06-14 11:40:46,464 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 308 selfloop transitions, 95 changer transitions 0/411 dead transitions. [2024-06-14 11:40:46,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 411 transitions, 6004 flow [2024-06-14 11:40:46,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:40:46,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:40:46,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-14 11:40:46,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6025641025641025 [2024-06-14 11:40:46,466 INFO L175 Difference]: Start difference. First operand has 238 places, 375 transitions, 4913 flow. Second operand 6 states and 188 transitions. [2024-06-14 11:40:46,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 411 transitions, 6004 flow [2024-06-14 11:40:47,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 411 transitions, 5666 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-14 11:40:47,998 INFO L231 Difference]: Finished difference. Result has 236 places, 375 transitions, 4796 flow [2024-06-14 11:40:47,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4587, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4796, PETRI_PLACES=236, PETRI_TRANSITIONS=375} [2024-06-14 11:40:47,998 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 181 predicate places. [2024-06-14 11:40:47,998 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 375 transitions, 4796 flow [2024-06-14 11:40:47,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:47,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:47,999 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 11:40:47,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 11:40:47,999 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:40:47,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:47,999 INFO L85 PathProgramCache]: Analyzing trace with hash -33447174, now seen corresponding path program 9 times [2024-06-14 11:40:47,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:48,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931907091] [2024-06-14 11:40:48,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:48,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:48,180 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 11:40:48,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:48,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931907091] [2024-06-14 11:40:48,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931907091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:48,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:48,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:48,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196800041] [2024-06-14 11:40:48,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:48,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:48,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:48,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:48,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:48,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-14 11:40:48,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 375 transitions, 4796 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:48,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:48,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-14 11:40:48,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:49,975 INFO L124 PetriNetUnfolderBase]: 8539/12503 cut-off events. [2024-06-14 11:40:49,976 INFO L125 PetriNetUnfolderBase]: For 654908/654924 co-relation queries the response was YES. [2024-06-14 11:40:50,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89223 conditions, 12503 events. 8539/12503 cut-off events. For 654908/654924 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 74187 event pairs, 2647 based on Foata normal form. 16/12509 useless extension candidates. Maximal degree in co-relation 89112. Up to 11391 conditions per place. [2024-06-14 11:40:50,191 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 298 selfloop transitions, 95 changer transitions 0/401 dead transitions. [2024-06-14 11:40:50,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 401 transitions, 5666 flow [2024-06-14 11:40:50,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:40:50,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:40:50,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-14 11:40:50,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-14 11:40:50,192 INFO L175 Difference]: Start difference. First operand has 236 places, 375 transitions, 4796 flow. Second operand 6 states and 176 transitions. [2024-06-14 11:40:50,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 401 transitions, 5666 flow [2024-06-14 11:40:51,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 401 transitions, 5452 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 11:40:51,585 INFO L231 Difference]: Finished difference. Result has 236 places, 376 transitions, 4794 flow [2024-06-14 11:40:51,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4585, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4794, PETRI_PLACES=236, PETRI_TRANSITIONS=376} [2024-06-14 11:40:51,586 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 181 predicate places. [2024-06-14 11:40:51,586 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 376 transitions, 4794 flow [2024-06-14 11:40:51,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:51,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:51,586 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 11:40:51,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 11:40:51,586 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:40:51,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:51,587 INFO L85 PathProgramCache]: Analyzing trace with hash -33050436, now seen corresponding path program 1 times [2024-06-14 11:40:51,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:51,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085613448] [2024-06-14 11:40:51,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:51,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:51,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:51,752 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 11:40:51,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:51,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085613448] [2024-06-14 11:40:51,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085613448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:51,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:51,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:51,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363583780] [2024-06-14 11:40:51,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:51,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:51,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:51,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:51,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:51,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-14 11:40:51,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 376 transitions, 4794 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:51,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:51,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-14 11:40:51,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:53,491 INFO L124 PetriNetUnfolderBase]: 8507/12460 cut-off events. [2024-06-14 11:40:53,492 INFO L125 PetriNetUnfolderBase]: For 625182/625184 co-relation queries the response was YES. [2024-06-14 11:40:53,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87870 conditions, 12460 events. 8507/12460 cut-off events. For 625182/625184 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 73692 event pairs, 2505 based on Foata normal form. 14/12467 useless extension candidates. Maximal degree in co-relation 87760. Up to 11216 conditions per place. [2024-06-14 11:40:53,645 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 365 selfloop transitions, 41 changer transitions 0/414 dead transitions. [2024-06-14 11:40:53,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 414 transitions, 5767 flow [2024-06-14 11:40:53,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:40:53,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:40:53,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-14 11:40:53,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5705128205128205 [2024-06-14 11:40:53,647 INFO L175 Difference]: Start difference. First operand has 236 places, 376 transitions, 4794 flow. Second operand 6 states and 178 transitions. [2024-06-14 11:40:53,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 414 transitions, 5767 flow [2024-06-14 11:40:55,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 414 transitions, 5614 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 11:40:55,256 INFO L231 Difference]: Finished difference. Result has 240 places, 381 transitions, 4794 flow [2024-06-14 11:40:55,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4641, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4794, PETRI_PLACES=240, PETRI_TRANSITIONS=381} [2024-06-14 11:40:55,257 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 185 predicate places. [2024-06-14 11:40:55,257 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 381 transitions, 4794 flow [2024-06-14 11:40:55,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:55,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:55,259 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 11:40:55,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 11:40:55,259 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:40:55,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:55,260 INFO L85 PathProgramCache]: Analyzing trace with hash 599147114, now seen corresponding path program 1 times [2024-06-14 11:40:55,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:55,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539193564] [2024-06-14 11:40:55,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:55,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:55,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:55,463 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 11:40:55,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:55,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539193564] [2024-06-14 11:40:55,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539193564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:55,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:55,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:40:55,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93625072] [2024-06-14 11:40:55,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:55,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:40:55,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:55,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:40:55,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:40:55,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-14 11:40:55,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 381 transitions, 4794 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:55,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:55,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-14 11:40:55,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:57,149 INFO L124 PetriNetUnfolderBase]: 7752/11549 cut-off events. [2024-06-14 11:40:57,149 INFO L125 PetriNetUnfolderBase]: For 693205/693359 co-relation queries the response was YES. [2024-06-14 11:40:57,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86126 conditions, 11549 events. 7752/11549 cut-off events. For 693205/693359 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 70763 event pairs, 2364 based on Foata normal form. 65/11385 useless extension candidates. Maximal degree in co-relation 86013. Up to 10124 conditions per place. [2024-06-14 11:40:57,324 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 296 selfloop transitions, 41 changer transitions 0/396 dead transitions. [2024-06-14 11:40:57,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 396 transitions, 5554 flow [2024-06-14 11:40:57,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:40:57,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:40:57,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-06-14 11:40:57,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6009615384615384 [2024-06-14 11:40:57,325 INFO L175 Difference]: Start difference. First operand has 240 places, 381 transitions, 4794 flow. Second operand 4 states and 125 transitions. [2024-06-14 11:40:57,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 396 transitions, 5554 flow [2024-06-14 11:40:59,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 396 transitions, 5504 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-14 11:40:59,264 INFO L231 Difference]: Finished difference. Result has 242 places, 385 transitions, 4910 flow [2024-06-14 11:40:59,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4744, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4910, PETRI_PLACES=242, PETRI_TRANSITIONS=385} [2024-06-14 11:40:59,265 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 187 predicate places. [2024-06-14 11:40:59,265 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 385 transitions, 4910 flow [2024-06-14 11:40:59,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:59,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:59,266 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 11:40:59,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 11:40:59,266 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:40:59,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:59,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1469081754, now seen corresponding path program 2 times [2024-06-14 11:40:59,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:59,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400003647] [2024-06-14 11:40:59,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:59,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:59,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:59,428 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 11:40:59,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:59,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400003647] [2024-06-14 11:40:59,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400003647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:59,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:59,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:40:59,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918635037] [2024-06-14 11:40:59,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:59,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:40:59,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:59,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:40:59,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:40:59,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-14 11:40:59,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 385 transitions, 4910 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:59,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:59,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-14 11:40:59,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:01,340 INFO L124 PetriNetUnfolderBase]: 7736/11489 cut-off events. [2024-06-14 11:41:01,340 INFO L125 PetriNetUnfolderBase]: For 716286/716440 co-relation queries the response was YES. [2024-06-14 11:41:01,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87755 conditions, 11489 events. 7736/11489 cut-off events. For 716286/716440 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 69978 event pairs, 2364 based on Foata normal form. 65/11325 useless extension candidates. Maximal degree in co-relation 87640. Up to 10096 conditions per place. [2024-06-14 11:41:01,485 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 297 selfloop transitions, 45 changer transitions 0/401 dead transitions. [2024-06-14 11:41:01,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 401 transitions, 5690 flow [2024-06-14 11:41:01,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:41:01,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:41:01,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-14 11:41:01,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5692307692307692 [2024-06-14 11:41:01,486 INFO L175 Difference]: Start difference. First operand has 242 places, 385 transitions, 4910 flow. Second operand 5 states and 148 transitions. [2024-06-14 11:41:01,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 401 transitions, 5690 flow [2024-06-14 11:41:02,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 401 transitions, 5570 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-14 11:41:02,739 INFO L231 Difference]: Finished difference. Result has 245 places, 389 transitions, 4961 flow [2024-06-14 11:41:02,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4796, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4961, PETRI_PLACES=245, PETRI_TRANSITIONS=389} [2024-06-14 11:41:02,740 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 190 predicate places. [2024-06-14 11:41:02,740 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 389 transitions, 4961 flow [2024-06-14 11:41:02,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:02,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:02,740 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 11:41:02,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 11:41:02,741 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:41:02,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:02,741 INFO L85 PathProgramCache]: Analyzing trace with hash 105682952, now seen corresponding path program 1 times [2024-06-14 11:41:02,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:02,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467490508] [2024-06-14 11:41:02,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:02,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:02,946 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 11:41:02,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:02,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467490508] [2024-06-14 11:41:02,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467490508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:02,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:02,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:41:02,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890092811] [2024-06-14 11:41:02,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:02,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:41:02,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:02,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:41:02,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:41:03,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-14 11:41:03,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 389 transitions, 4961 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:03,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:03,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-14 11:41:03,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:04,896 INFO L124 PetriNetUnfolderBase]: 8300/12394 cut-off events. [2024-06-14 11:41:04,897 INFO L125 PetriNetUnfolderBase]: For 713618/713628 co-relation queries the response was YES. [2024-06-14 11:41:05,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92748 conditions, 12394 events. 8300/12394 cut-off events. For 713618/713628 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 75870 event pairs, 2387 based on Foata normal form. 30/12418 useless extension candidates. Maximal degree in co-relation 92632. Up to 10750 conditions per place. [2024-06-14 11:41:05,127 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 385 selfloop transitions, 49 changer transitions 0/445 dead transitions. [2024-06-14 11:41:05,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 445 transitions, 6290 flow [2024-06-14 11:41:05,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:41:05,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:41:05,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2024-06-14 11:41:05,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934065934065934 [2024-06-14 11:41:05,128 INFO L175 Difference]: Start difference. First operand has 245 places, 389 transitions, 4961 flow. Second operand 7 states and 216 transitions. [2024-06-14 11:41:05,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 445 transitions, 6290 flow [2024-06-14 11:41:06,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 445 transitions, 6157 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-14 11:41:06,860 INFO L231 Difference]: Finished difference. Result has 251 places, 400 transitions, 5105 flow [2024-06-14 11:41:06,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4828, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5105, PETRI_PLACES=251, PETRI_TRANSITIONS=400} [2024-06-14 11:41:06,861 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 196 predicate places. [2024-06-14 11:41:06,861 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 400 transitions, 5105 flow [2024-06-14 11:41:06,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:06,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:06,861 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 11:41:06,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 11:41:06,861 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:41:06,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:06,862 INFO L85 PathProgramCache]: Analyzing trace with hash 548518920, now seen corresponding path program 2 times [2024-06-14 11:41:06,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:06,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684661132] [2024-06-14 11:41:06,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:06,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:07,053 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 11:41:07,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:07,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684661132] [2024-06-14 11:41:07,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684661132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:07,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:07,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:41:07,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307505793] [2024-06-14 11:41:07,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:07,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:41:07,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:07,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:41:07,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:41:07,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-14 11:41:07,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 400 transitions, 5105 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:07,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:07,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-14 11:41:07,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:09,106 INFO L124 PetriNetUnfolderBase]: 8640/12906 cut-off events. [2024-06-14 11:41:09,106 INFO L125 PetriNetUnfolderBase]: For 785827/785837 co-relation queries the response was YES. [2024-06-14 11:41:09,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98983 conditions, 12906 events. 8640/12906 cut-off events. For 785827/785837 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 79623 event pairs, 2631 based on Foata normal form. 30/12930 useless extension candidates. Maximal degree in co-relation 98864. Up to 11484 conditions per place. [2024-06-14 11:41:09,282 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 388 selfloop transitions, 45 changer transitions 0/444 dead transitions. [2024-06-14 11:41:09,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 444 transitions, 6368 flow [2024-06-14 11:41:09,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:41:09,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:41:09,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-14 11:41:09,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5851648351648352 [2024-06-14 11:41:09,284 INFO L175 Difference]: Start difference. First operand has 251 places, 400 transitions, 5105 flow. Second operand 7 states and 213 transitions. [2024-06-14 11:41:09,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 444 transitions, 6368 flow [2024-06-14 11:41:11,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 444 transitions, 6281 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-14 11:41:11,141 INFO L231 Difference]: Finished difference. Result has 257 places, 405 transitions, 5217 flow [2024-06-14 11:41:11,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5022, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5217, PETRI_PLACES=257, PETRI_TRANSITIONS=405} [2024-06-14 11:41:11,142 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 202 predicate places. [2024-06-14 11:41:11,142 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 405 transitions, 5217 flow [2024-06-14 11:41:11,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:11,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:11,142 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] [2024-06-14 11:41:11,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 11:41:11,142 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:41:11,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:11,143 INFO L85 PathProgramCache]: Analyzing trace with hash 548666790, now seen corresponding path program 3 times [2024-06-14 11:41:11,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:11,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409516900] [2024-06-14 11:41:11,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:11,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:11,338 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 11:41:11,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:11,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409516900] [2024-06-14 11:41:11,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409516900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:11,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:11,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:41:11,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274492046] [2024-06-14 11:41:11,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:11,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:41:11,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:11,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:41:11,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:41:11,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-14 11:41:11,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 405 transitions, 5217 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:11,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:11,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-14 11:41:11,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:13,372 INFO L124 PetriNetUnfolderBase]: 8568/12802 cut-off events. [2024-06-14 11:41:13,373 INFO L125 PetriNetUnfolderBase]: For 789315/789325 co-relation queries the response was YES. [2024-06-14 11:41:13,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97692 conditions, 12802 events. 8568/12802 cut-off events. For 789315/789325 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 78875 event pairs, 2633 based on Foata normal form. 38/12834 useless extension candidates. Maximal degree in co-relation 97570. Up to 11626 conditions per place. [2024-06-14 11:41:13,581 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 387 selfloop transitions, 42 changer transitions 0/440 dead transitions. [2024-06-14 11:41:13,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 440 transitions, 6199 flow [2024-06-14 11:41:13,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:41:13,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:41:13,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-14 11:41:13,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 11:41:13,582 INFO L175 Difference]: Start difference. First operand has 257 places, 405 transitions, 5217 flow. Second operand 7 states and 208 transitions. [2024-06-14 11:41:13,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 440 transitions, 6199 flow [2024-06-14 11:41:16,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 440 transitions, 6110 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-14 11:41:16,521 INFO L231 Difference]: Finished difference. Result has 261 places, 406 transitions, 5240 flow [2024-06-14 11:41:16,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5132, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5240, PETRI_PLACES=261, PETRI_TRANSITIONS=406} [2024-06-14 11:41:16,522 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 206 predicate places. [2024-06-14 11:41:16,522 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 406 transitions, 5240 flow [2024-06-14 11:41:16,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:16,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:16,522 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 11:41:16,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 11:41:16,523 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:41:16,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:16,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1155419214, now seen corresponding path program 4 times [2024-06-14 11:41:16,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:16,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259782773] [2024-06-14 11:41:16,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:16,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:16,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:16,744 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 11:41:16,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:16,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259782773] [2024-06-14 11:41:16,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259782773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:16,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:16,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:41:16,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66933979] [2024-06-14 11:41:16,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:16,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:41:16,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:16,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:41:16,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:41:16,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-14 11:41:16,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 406 transitions, 5240 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:16,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:16,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-14 11:41:16,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:19,267 INFO L124 PetriNetUnfolderBase]: 8725/13041 cut-off events. [2024-06-14 11:41:19,267 INFO L125 PetriNetUnfolderBase]: For 818605/818615 co-relation queries the response was YES. [2024-06-14 11:41:19,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99554 conditions, 13041 events. 8725/13041 cut-off events. For 818605/818615 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 80818 event pairs, 2641 based on Foata normal form. 40/13077 useless extension candidates. Maximal degree in co-relation 99430. Up to 11898 conditions per place. [2024-06-14 11:41:19,431 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 396 selfloop transitions, 39 changer transitions 0/446 dead transitions. [2024-06-14 11:41:19,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 446 transitions, 6270 flow [2024-06-14 11:41:19,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:41:19,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:41:19,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 232 transitions. [2024-06-14 11:41:19,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5576923076923077 [2024-06-14 11:41:19,433 INFO L175 Difference]: Start difference. First operand has 261 places, 406 transitions, 5240 flow. Second operand 8 states and 232 transitions. [2024-06-14 11:41:19,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 446 transitions, 6270 flow [2024-06-14 11:41:20,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 446 transitions, 6186 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 11:41:20,882 INFO L231 Difference]: Finished difference. Result has 264 places, 408 transitions, 5290 flow [2024-06-14 11:41:20,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5156, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5290, PETRI_PLACES=264, PETRI_TRANSITIONS=408} [2024-06-14 11:41:20,883 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 209 predicate places. [2024-06-14 11:41:20,883 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 408 transitions, 5290 flow [2024-06-14 11:41:20,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:20,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:20,884 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 11:41:20,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 11:41:20,884 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:41:20,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:20,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1160781594, now seen corresponding path program 5 times [2024-06-14 11:41:20,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:20,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876293266] [2024-06-14 11:41:20,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:20,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:20,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:21,121 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 11:41:21,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:21,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876293266] [2024-06-14 11:41:21,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876293266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:21,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:21,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:41:21,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929718374] [2024-06-14 11:41:21,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:21,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:41:21,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:21,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:41:21,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:41:21,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-14 11:41:21,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 408 transitions, 5290 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:21,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:21,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-14 11:41:21,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:23,746 INFO L124 PetriNetUnfolderBase]: 8816/13202 cut-off events. [2024-06-14 11:41:23,746 INFO L125 PetriNetUnfolderBase]: For 842823/842833 co-relation queries the response was YES. [2024-06-14 11:41:23,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100807 conditions, 13202 events. 8816/13202 cut-off events. For 842823/842833 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 82010 event pairs, 2683 based on Foata normal form. 38/13234 useless extension candidates. Maximal degree in co-relation 100682. Up to 12042 conditions per place. [2024-06-14 11:41:23,924 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 394 selfloop transitions, 35 changer transitions 0/440 dead transitions. [2024-06-14 11:41:23,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 440 transitions, 6292 flow [2024-06-14 11:41:23,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:41:23,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:41:23,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-14 11:41:23,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5865384615384616 [2024-06-14 11:41:23,925 INFO L175 Difference]: Start difference. First operand has 264 places, 408 transitions, 5290 flow. Second operand 6 states and 183 transitions. [2024-06-14 11:41:23,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 440 transitions, 6292 flow [2024-06-14 11:41:25,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 440 transitions, 6198 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 11:41:25,650 INFO L231 Difference]: Finished difference. Result has 264 places, 410 transitions, 5326 flow [2024-06-14 11:41:25,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5196, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5326, PETRI_PLACES=264, PETRI_TRANSITIONS=410} [2024-06-14 11:41:25,650 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 209 predicate places. [2024-06-14 11:41:25,650 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 410 transitions, 5326 flow [2024-06-14 11:41:25,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:25,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:25,651 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 11:41:25,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 11:41:25,651 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:41:25,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:25,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1160929464, now seen corresponding path program 6 times [2024-06-14 11:41:25,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:25,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195982148] [2024-06-14 11:41:25,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:25,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:25,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:41:25,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:25,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195982148] [2024-06-14 11:41:25,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195982148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:25,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:25,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:41:25,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381507428] [2024-06-14 11:41:25,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:25,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:41:25,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:25,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:41:25,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:41:25,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-14 11:41:25,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 410 transitions, 5326 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:25,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:25,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-14 11:41:25,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:28,545 INFO L124 PetriNetUnfolderBase]: 8764/13126 cut-off events. [2024-06-14 11:41:28,545 INFO L125 PetriNetUnfolderBase]: For 830568/830578 co-relation queries the response was YES. [2024-06-14 11:41:28,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99498 conditions, 13126 events. 8764/13126 cut-off events. For 830568/830578 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 81402 event pairs, 2439 based on Foata normal form. 30/13150 useless extension candidates. Maximal degree in co-relation 99372. Up to 11548 conditions per place. [2024-06-14 11:41:28,723 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 394 selfloop transitions, 43 changer transitions 0/448 dead transitions. [2024-06-14 11:41:28,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 448 transitions, 6344 flow [2024-06-14 11:41:28,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:41:28,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:41:28,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-14 11:41:28,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6057692307692307 [2024-06-14 11:41:28,724 INFO L175 Difference]: Start difference. First operand has 264 places, 410 transitions, 5326 flow. Second operand 6 states and 189 transitions. [2024-06-14 11:41:28,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 448 transitions, 6344 flow [2024-06-14 11:41:30,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 448 transitions, 6236 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 11:41:30,545 INFO L231 Difference]: Finished difference. Result has 267 places, 412 transitions, 5354 flow [2024-06-14 11:41:30,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5222, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5354, PETRI_PLACES=267, PETRI_TRANSITIONS=412} [2024-06-14 11:41:30,545 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 212 predicate places. [2024-06-14 11:41:30,546 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 412 transitions, 5354 flow [2024-06-14 11:41:30,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:30,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:30,546 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 11:41:30,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 11:41:30,546 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:41:30,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:30,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1155204012, now seen corresponding path program 1 times [2024-06-14 11:41:30,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:30,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873128903] [2024-06-14 11:41:30,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:30,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:30,748 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 11:41:30,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:30,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873128903] [2024-06-14 11:41:30,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873128903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:30,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:30,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:41:30,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435599424] [2024-06-14 11:41:30,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:30,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:41:30,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:30,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:41:30,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:41:30,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-14 11:41:30,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 412 transitions, 5354 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:30,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:30,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-14 11:41:30,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:33,425 INFO L124 PetriNetUnfolderBase]: 8713/13045 cut-off events. [2024-06-14 11:41:33,426 INFO L125 PetriNetUnfolderBase]: For 824368/824378 co-relation queries the response was YES. [2024-06-14 11:41:33,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98272 conditions, 13045 events. 8713/13045 cut-off events. For 824368/824378 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 80619 event pairs, 2518 based on Foata normal form. 32/13073 useless extension candidates. Maximal degree in co-relation 98144. Up to 11476 conditions per place. [2024-06-14 11:41:33,617 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 396 selfloop transitions, 48 changer transitions 0/455 dead transitions. [2024-06-14 11:41:33,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 455 transitions, 6414 flow [2024-06-14 11:41:33,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:41:33,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:41:33,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-06-14 11:41:33,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5649038461538461 [2024-06-14 11:41:33,619 INFO L175 Difference]: Start difference. First operand has 267 places, 412 transitions, 5354 flow. Second operand 8 states and 235 transitions. [2024-06-14 11:41:33,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 455 transitions, 6414 flow [2024-06-14 11:41:35,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 455 transitions, 6261 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 11:41:35,253 INFO L231 Difference]: Finished difference. Result has 270 places, 414 transitions, 5348 flow [2024-06-14 11:41:35,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5201, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5348, PETRI_PLACES=270, PETRI_TRANSITIONS=414} [2024-06-14 11:41:35,253 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 215 predicate places. [2024-06-14 11:41:35,253 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 414 transitions, 5348 flow [2024-06-14 11:41:35,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:35,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:35,254 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 11:41:35,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 11:41:35,254 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:41:35,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:35,254 INFO L85 PathProgramCache]: Analyzing trace with hash -2033060402, now seen corresponding path program 1 times [2024-06-14 11:41:35,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:35,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566418409] [2024-06-14 11:41:35,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:35,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:35,536 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 11:41:35,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:35,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566418409] [2024-06-14 11:41:35,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566418409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:35,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:35,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:41:35,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060521191] [2024-06-14 11:41:35,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:35,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:41:35,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:35,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:41:35,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:41:35,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-14 11:41:35,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 414 transitions, 5348 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:35,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:35,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-14 11:41:35,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:38,194 INFO L124 PetriNetUnfolderBase]: 8413/12771 cut-off events. [2024-06-14 11:41:38,195 INFO L125 PetriNetUnfolderBase]: For 826076/826081 co-relation queries the response was YES. [2024-06-14 11:41:38,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96276 conditions, 12771 events. 8413/12771 cut-off events. For 826076/826081 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 80904 event pairs, 2591 based on Foata normal form. 9/12749 useless extension candidates. Maximal degree in co-relation 96148. Up to 11470 conditions per place. [2024-06-14 11:41:38,387 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 352 selfloop transitions, 48 changer transitions 0/438 dead transitions. [2024-06-14 11:41:38,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 438 transitions, 6458 flow [2024-06-14 11:41:38,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:41:38,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:41:38,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-06-14 11:41:38,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5846153846153846 [2024-06-14 11:41:38,389 INFO L175 Difference]: Start difference. First operand has 270 places, 414 transitions, 5348 flow. Second operand 5 states and 152 transitions. [2024-06-14 11:41:38,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 438 transitions, 6458 flow [2024-06-14 11:41:40,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 438 transitions, 6337 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 11:41:40,279 INFO L231 Difference]: Finished difference. Result has 269 places, 422 transitions, 5503 flow [2024-06-14 11:41:40,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5227, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5503, PETRI_PLACES=269, PETRI_TRANSITIONS=422} [2024-06-14 11:41:40,280 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 214 predicate places. [2024-06-14 11:41:40,280 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 422 transitions, 5503 flow [2024-06-14 11:41:40,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:40,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:40,280 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 11:41:40,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 11:41:40,281 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:41:40,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:40,281 INFO L85 PathProgramCache]: Analyzing trace with hash -2009847602, now seen corresponding path program 2 times [2024-06-14 11:41:40,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:40,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510985992] [2024-06-14 11:41:40,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:40,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:40,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:40,439 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 11:41:40,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:40,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510985992] [2024-06-14 11:41:40,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510985992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:40,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:40,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:41:40,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579883805] [2024-06-14 11:41:40,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:40,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:41:40,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:40,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:41:40,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:41:40,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-14 11:41:40,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 422 transitions, 5503 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:40,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:40,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-14 11:41:40,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:42,794 INFO L124 PetriNetUnfolderBase]: 8399/12753 cut-off events. [2024-06-14 11:41:42,795 INFO L125 PetriNetUnfolderBase]: For 851460/851465 co-relation queries the response was YES. [2024-06-14 11:41:42,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97105 conditions, 12753 events. 8399/12753 cut-off events. For 851460/851465 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 80754 event pairs, 2591 based on Foata normal form. 9/12731 useless extension candidates. Maximal degree in co-relation 96976. Up to 11470 conditions per place. [2024-06-14 11:41:43,214 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 354 selfloop transitions, 44 changer transitions 0/436 dead transitions. [2024-06-14 11:41:43,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 436 transitions, 6335 flow [2024-06-14 11:41:43,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:41:43,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:41:43,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-06-14 11:41:43,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-14 11:41:43,215 INFO L175 Difference]: Start difference. First operand has 269 places, 422 transitions, 5503 flow. Second operand 4 states and 128 transitions. [2024-06-14 11:41:43,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 436 transitions, 6335 flow [2024-06-14 11:41:45,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 436 transitions, 6178 flow, removed 62 selfloop flow, removed 1 redundant places. [2024-06-14 11:41:45,259 INFO L231 Difference]: Finished difference. Result has 272 places, 422 transitions, 5455 flow [2024-06-14 11:41:45,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5346, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5455, PETRI_PLACES=272, PETRI_TRANSITIONS=422} [2024-06-14 11:41:45,260 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 217 predicate places. [2024-06-14 11:41:45,260 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 422 transitions, 5455 flow [2024-06-14 11:41:45,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:45,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:45,260 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 11:41:45,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 11:41:45,261 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:41:45,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:45,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1469060922, now seen corresponding path program 1 times [2024-06-14 11:41:45,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:45,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845897071] [2024-06-14 11:41:45,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:45,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:45,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:45,432 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 11:41:45,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:45,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845897071] [2024-06-14 11:41:45,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845897071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:45,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:45,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:41:45,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070050916] [2024-06-14 11:41:45,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:45,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:41:45,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:45,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:41:45,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:41:45,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-14 11:41:45,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 422 transitions, 5455 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:45,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:45,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-14 11:41:45,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:47,666 INFO L124 PetriNetUnfolderBase]: 8575/12760 cut-off events. [2024-06-14 11:41:47,666 INFO L125 PetriNetUnfolderBase]: For 947973/948117 co-relation queries the response was YES. [2024-06-14 11:41:48,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99005 conditions, 12760 events. 8575/12760 cut-off events. For 947973/948117 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 79240 event pairs, 2443 based on Foata normal form. 46/12573 useless extension candidates. Maximal degree in co-relation 98874. Up to 11396 conditions per place. [2024-06-14 11:41:48,120 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 359 selfloop transitions, 21 changer transitions 0/440 dead transitions. [2024-06-14 11:41:48,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 440 transitions, 6319 flow [2024-06-14 11:41:48,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:41:48,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:41:48,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-14 11:41:48,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5615384615384615 [2024-06-14 11:41:48,122 INFO L175 Difference]: Start difference. First operand has 272 places, 422 transitions, 5455 flow. Second operand 5 states and 146 transitions. [2024-06-14 11:41:48,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 440 transitions, 6319 flow [2024-06-14 11:41:50,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 440 transitions, 6231 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 11:41:50,141 INFO L231 Difference]: Finished difference. Result has 274 places, 425 transitions, 5467 flow [2024-06-14 11:41:50,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5367, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5467, PETRI_PLACES=274, PETRI_TRANSITIONS=425} [2024-06-14 11:41:50,142 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 219 predicate places. [2024-06-14 11:41:50,142 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 425 transitions, 5467 flow [2024-06-14 11:41:50,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:50,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:50,142 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 11:41:50,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 11:41:50,143 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:41:50,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:50,143 INFO L85 PathProgramCache]: Analyzing trace with hash 2090995944, now seen corresponding path program 1 times [2024-06-14 11:41:50,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:50,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261258031] [2024-06-14 11:41:50,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:50,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:50,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:50,347 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 11:41:50,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:50,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261258031] [2024-06-14 11:41:50,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261258031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:50,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:50,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:41:50,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178681557] [2024-06-14 11:41:50,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:50,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:41:50,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:50,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:41:50,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:41:50,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-14 11:41:50,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 425 transitions, 5467 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:50,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:50,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-14 11:41:50,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:52,923 INFO L124 PetriNetUnfolderBase]: 9414/13802 cut-off events. [2024-06-14 11:41:52,923 INFO L125 PetriNetUnfolderBase]: For 897645/897682 co-relation queries the response was YES. [2024-06-14 11:41:53,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104146 conditions, 13802 events. 9414/13802 cut-off events. For 897645/897682 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 83569 event pairs, 2696 based on Foata normal form. 25/13819 useless extension candidates. Maximal degree in co-relation 104014. Up to 12220 conditions per place. [2024-06-14 11:41:53,379 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 375 selfloop transitions, 143 changer transitions 0/526 dead transitions. [2024-06-14 11:41:53,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 526 transitions, 7598 flow [2024-06-14 11:41:53,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:41:53,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:41:53,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 245 transitions. [2024-06-14 11:41:53,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5889423076923077 [2024-06-14 11:41:53,380 INFO L175 Difference]: Start difference. First operand has 274 places, 425 transitions, 5467 flow. Second operand 8 states and 245 transitions. [2024-06-14 11:41:53,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 526 transitions, 7598 flow [2024-06-14 11:41:55,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 526 transitions, 7520 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-14 11:41:55,357 INFO L231 Difference]: Finished difference. Result has 282 places, 466 transitions, 6298 flow [2024-06-14 11:41:55,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5391, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6298, PETRI_PLACES=282, PETRI_TRANSITIONS=466} [2024-06-14 11:41:55,357 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 227 predicate places. [2024-06-14 11:41:55,358 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 466 transitions, 6298 flow [2024-06-14 11:41:55,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:55,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:55,358 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 11:41:55,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 11:41:55,358 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:41:55,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:55,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1480311908, now seen corresponding path program 2 times [2024-06-14 11:41:55,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:55,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215838538] [2024-06-14 11:41:55,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:55,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:55,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:55,566 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 11:41:55,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:55,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215838538] [2024-06-14 11:41:55,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215838538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:55,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:55,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:41:55,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550062597] [2024-06-14 11:41:55,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:55,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:41:55,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:55,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:41:55,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:41:55,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-14 11:41:55,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 466 transitions, 6298 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:55,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:55,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-14 11:41:55,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand