./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe027_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/safe027_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/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe027_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 11:32:24,760 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 11:32:24,823 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 11:32:24,828 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 11:32:24,828 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 11:32:24,851 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 11:32:24,851 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 11:32:24,852 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 11:32:24,852 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 11:32:24,855 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 11:32:24,855 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 11:32:24,856 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 11:32:24,857 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 11:32:24,858 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 11:32:24,858 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 11:32:24,858 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 11:32:24,858 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 11:32:24,858 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 11:32:24,859 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 11:32:24,859 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 11:32:24,860 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 11:32:24,860 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 11:32:24,861 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 11:32:24,861 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 11:32:24,861 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 11:32:24,861 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 11:32:24,861 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 11:32:24,862 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 11:32:24,862 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 11:32:24,862 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 11:32:24,863 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 11:32:24,863 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 11:32:24,863 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:32:24,864 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 11:32:24,864 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 11:32:24,864 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 11:32:24,864 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 11:32:24,864 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 11:32:24,865 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 11:32:24,865 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 11:32:24,865 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 11:32:24,865 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 11:32:24,865 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 11:32:24,866 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 11:32:25,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 11:32:25,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 11:32:25,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 11:32:25,113 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 11:32:25,113 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 11:32:25,115 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 11:32:26,211 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 11:32:26,437 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 11:32:26,440 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 11:32:26,456 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0952aef6b/017be563d1aa44af9f08dfb5a55a9fab/FLAGb3e0cb8ca [2024-06-14 11:32:26,467 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0952aef6b/017be563d1aa44af9f08dfb5a55a9fab [2024-06-14 11:32:26,469 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 11:32:26,470 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 11:32:26,471 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-14 11:32:26,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 11:32:26,589 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 11:32:26,590 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 11:32:26,590 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 11:32:26,593 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 11:32:26,594 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:32:26" (1/2) ... [2024-06-14 11:32:26,594 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@451f6271 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:32:26, skipping insertion in model container [2024-06-14 11:32:26,595 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:32:26" (1/2) ... [2024-06-14 11:32:26,596 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@32088ad9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:32:26, skipping insertion in model container [2024-06-14 11:32:26,596 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:32:26" (2/2) ... [2024-06-14 11:32:26,596 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@451f6271 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:32:26, skipping insertion in model container [2024-06-14 11:32:26,597 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:32:26" (2/2) ... [2024-06-14 11:32:26,597 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 11:32:26,636 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 11:32:26,637 INFO L97 edCorrectnessWitness]: Location invariant before [L798-L798] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 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)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-14 11:32:26,637 INFO L97 edCorrectnessWitness]: Location invariant before [L795-L795] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 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)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-14 11:32:26,638 INFO L97 edCorrectnessWitness]: Location invariant before [L793-L793] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 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)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-14 11:32:26,638 INFO L97 edCorrectnessWitness]: Location invariant before [L797-L797] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 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)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-14 11:32:26,638 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 11:32:26,638 INFO L106 edCorrectnessWitness]: ghost_update [L791-L791] multithreaded = 1; [2024-06-14 11:32:26,670 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 11:32:26,959 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:32:26,966 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 11:32:27,111 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:32:27,144 INFO L206 MainTranslator]: Completed translation [2024-06-14 11:32:27,145 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:32:27 WrapperNode [2024-06-14 11:32:27,145 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 11:32:27,146 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 11:32:27,146 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 11:32:27,146 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 11:32:27,151 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 11:32:27" (1/1) ... [2024-06-14 11:32:27,173 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 11:32:27" (1/1) ... [2024-06-14 11:32:27,192 INFO L138 Inliner]: procedures = 176, calls = 47, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2024-06-14 11:32:27,193 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 11:32:27,193 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 11:32:27,194 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 11:32:27,194 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 11:32:27,203 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 11:32:27" (1/1) ... [2024-06-14 11:32:27,203 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 11:32:27" (1/1) ... [2024-06-14 11:32:27,215 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 11:32:27" (1/1) ... [2024-06-14 11:32:27,227 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 11:32:27,227 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 11:32:27" (1/1) ... [2024-06-14 11:32:27,227 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 11:32:27" (1/1) ... [2024-06-14 11:32:27,233 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 11:32:27" (1/1) ... [2024-06-14 11:32:27,235 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 11:32:27" (1/1) ... [2024-06-14 11:32:27,236 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 11:32:27" (1/1) ... [2024-06-14 11:32:27,237 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 11:32:27" (1/1) ... [2024-06-14 11:32:27,239 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 11:32:27,240 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 11:32:27,240 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 11:32:27,240 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 11:32:27,241 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 11:32:27" (1/1) ... [2024-06-14 11:32:27,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:32:27,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 11:32:27,309 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 11:32:27,318 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 11:32:27,340 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 11:32:27,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 11:32:27,341 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 11:32:27,341 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 11:32:27,341 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 11:32:27,341 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 11:32:27,341 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 11:32:27,341 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 11:32:27,342 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 11:32:27,342 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 11:32:27,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 11:32:27,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 11:32:27,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 11:32:27,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 11:32:27,344 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 11:32:27,426 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 11:32:27,428 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 11:32:27,651 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 11:32:27,651 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 11:32:27,727 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 11:32:27,727 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 11:32:27,728 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:32:27 BoogieIcfgContainer [2024-06-14 11:32:27,728 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 11:32:27,730 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 11:32:27,730 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 11:32:27,732 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 11:32:27,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 11:32:26" (1/4) ... [2024-06-14 11:32:27,734 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8e587d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:32:27, skipping insertion in model container [2024-06-14 11:32:27,734 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:32:26" (2/4) ... [2024-06-14 11:32:27,734 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8e587d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:32:27, skipping insertion in model container [2024-06-14 11:32:27,735 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 11:32:27" (3/4) ... [2024-06-14 11:32:27,735 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8e587d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:32:27, skipping insertion in model container [2024-06-14 11:32:27,735 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:32:27" (4/4) ... [2024-06-14 11:32:27,736 INFO L112 eAbstractionObserver]: Analyzing ICFG safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 11:32:27,748 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 11:32:27,748 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 11:32:27,749 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 11:32:27,800 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 11:32:27,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 50 transitions, 116 flow [2024-06-14 11:32:27,853 INFO L124 PetriNetUnfolderBase]: 0/46 cut-off events. [2024-06-14 11:32:27,854 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:32:27,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 46 events. 0/46 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. 0/42 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 11:32:27,856 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 50 transitions, 116 flow [2024-06-14 11:32:27,859 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 40 transitions, 92 flow [2024-06-14 11:32:27,871 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 11:32:27,877 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;@7a2fce71, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 11:32:27,877 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 11:32:27,881 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 11:32:27,881 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 11:32:27,881 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:32:27,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:27,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 11:32:27,882 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 11:32:27,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:27,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1398728841, now seen corresponding path program 1 times [2024-06-14 11:32:27,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:27,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588299666] [2024-06-14 11:32:27,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:27,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:28,378 INFO 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 11:32:28,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:28,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588299666] [2024-06-14 11:32:28,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588299666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:28,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:28,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 11:32:28,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418352313] [2024-06-14 11:32:28,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:28,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 11:32:28,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:28,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 11:32:28,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 11:32:28,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 50 [2024-06-14 11:32:28,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 92 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 11:32:28,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:28,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 50 [2024-06-14 11:32:28,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:28,734 INFO L124 PetriNetUnfolderBase]: 1447/2146 cut-off events. [2024-06-14 11:32:28,734 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-06-14 11:32:28,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4338 conditions, 2146 events. 1447/2146 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 11653 event pairs, 968 based on Foata normal form. 1/2065 useless extension candidates. Maximal degree in co-relation 4322. Up to 2069 conditions per place. [2024-06-14 11:32:28,749 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 37 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2024-06-14 11:32:28,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 213 flow [2024-06-14 11:32:28,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 11:32:28,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 11:32:28,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-06-14 11:32:28,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7066666666666667 [2024-06-14 11:32:28,760 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 92 flow. Second operand 3 states and 106 transitions. [2024-06-14 11:32:28,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 213 flow [2024-06-14 11:32:28,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 54 transitions, 206 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 11:32:28,764 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 127 flow [2024-06-14 11:32:28,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2024-06-14 11:32:28,767 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -1 predicate places. [2024-06-14 11:32:28,768 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 127 flow [2024-06-14 11:32:28,768 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 11:32:28,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:28,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:28,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 11:32:28,769 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 11:32:28,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:28,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1098718867, now seen corresponding path program 1 times [2024-06-14 11:32:28,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:28,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232697254] [2024-06-14 11:32:28,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:28,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:28,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:28,991 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 11:32:28,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:28,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232697254] [2024-06-14 11:32:28,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232697254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:28,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:28,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:32:28,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584646747] [2024-06-14 11:32:28,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:28,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:32:28,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:28,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:32:28,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:32:29,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 11:32:29,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 127 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 11:32:29,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:29,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 11:32:29,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:29,341 INFO L124 PetriNetUnfolderBase]: 2467/3606 cut-off events. [2024-06-14 11:32:29,342 INFO L125 PetriNetUnfolderBase]: For 758/950 co-relation queries the response was YES. [2024-06-14 11:32:29,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8518 conditions, 3606 events. 2467/3606 cut-off events. For 758/950 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 19391 event pairs, 1331 based on Foata normal form. 35/3610 useless extension candidates. Maximal degree in co-relation 8503. Up to 3263 conditions per place. [2024-06-14 11:32:29,361 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 53 selfloop transitions, 7 changer transitions 0/70 dead transitions. [2024-06-14 11:32:29,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 70 transitions, 315 flow [2024-06-14 11:32:29,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:32:29,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:32:29,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 136 transitions. [2024-06-14 11:32:29,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-06-14 11:32:29,366 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 127 flow. Second operand 4 states and 136 transitions. [2024-06-14 11:32:29,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 70 transitions, 315 flow [2024-06-14 11:32:29,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 70 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 11:32:29,371 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 154 flow [2024-06-14 11:32:29,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2024-06-14 11:32:29,372 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 1 predicate places. [2024-06-14 11:32:29,372 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 154 flow [2024-06-14 11:32:29,374 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 11:32:29,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:29,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:29,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 11:32:29,375 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:32:29,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:29,379 INFO L85 PathProgramCache]: Analyzing trace with hash 721389010, now seen corresponding path program 1 times [2024-06-14 11:32:29,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:29,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61893268] [2024-06-14 11:32:29,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:29,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:29,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:29,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:29,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:29,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61893268] [2024-06-14 11:32:29,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61893268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:29,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:29,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:32:29,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131229833] [2024-06-14 11:32:29,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:29,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:32:29,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:29,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:32:29,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:32:29,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 11:32:29,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:29,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:29,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 11:32:29,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:29,838 INFO L124 PetriNetUnfolderBase]: 2618/4065 cut-off events. [2024-06-14 11:32:29,838 INFO L125 PetriNetUnfolderBase]: For 1862/1910 co-relation queries the response was YES. [2024-06-14 11:32:29,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9970 conditions, 4065 events. 2618/4065 cut-off events. For 1862/1910 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 23317 event pairs, 1356 based on Foata normal form. 3/4041 useless extension candidates. Maximal degree in co-relation 9953. Up to 3654 conditions per place. [2024-06-14 11:32:29,858 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 51 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-06-14 11:32:29,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 346 flow [2024-06-14 11:32:29,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:32:29,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:32:29,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-06-14 11:32:29,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-06-14 11:32:29,860 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 154 flow. Second operand 4 states and 129 transitions. [2024-06-14 11:32:29,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 346 flow [2024-06-14 11:32:29,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 70 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-14 11:32:29,862 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 214 flow [2024-06-14 11:32:29,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2024-06-14 11:32:29,863 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 4 predicate places. [2024-06-14 11:32:29,863 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 214 flow [2024-06-14 11:32:29,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:29,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:29,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:29,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 11:32:29,864 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 11:32:29,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:29,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1765159729, now seen corresponding path program 1 times [2024-06-14 11:32:29,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:29,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489393360] [2024-06-14 11:32:29,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:29,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:29,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:30,013 INFO 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 11:32:30,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:30,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489393360] [2024-06-14 11:32:30,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489393360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:30,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:30,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:32:30,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972158461] [2024-06-14 11:32:30,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:30,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:32:30,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:30,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:32:30,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:32:30,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 11:32:30,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 214 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 11:32:30,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:30,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 11:32:30,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:30,467 INFO L124 PetriNetUnfolderBase]: 2603/4010 cut-off events. [2024-06-14 11:32:30,467 INFO L125 PetriNetUnfolderBase]: For 3311/3363 co-relation queries the response was YES. [2024-06-14 11:32:30,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11039 conditions, 4010 events. 2603/4010 cut-off events. For 3311/3363 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 22824 event pairs, 1272 based on Foata normal form. 6/3972 useless extension candidates. Maximal degree in co-relation 11020. Up to 3603 conditions per place. [2024-06-14 11:32:30,488 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 59 selfloop transitions, 12 changer transitions 0/81 dead transitions. [2024-06-14 11:32:30,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 81 transitions, 436 flow [2024-06-14 11:32:30,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:32:30,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:32:30,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-14 11:32:30,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.632 [2024-06-14 11:32:30,492 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 214 flow. Second operand 5 states and 158 transitions. [2024-06-14 11:32:30,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 81 transitions, 436 flow [2024-06-14 11:32:30,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 81 transitions, 432 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-14 11:32:30,496 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 266 flow [2024-06-14 11:32:30,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=210, 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=266, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2024-06-14 11:32:30,498 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 9 predicate places. [2024-06-14 11:32:30,498 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 266 flow [2024-06-14 11:32:30,498 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 11:32:30,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:30,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:30,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 11:32:30,499 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 11:32:30,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:30,499 INFO L85 PathProgramCache]: Analyzing trace with hash -187121951, now seen corresponding path program 1 times [2024-06-14 11:32:30,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:30,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934627507] [2024-06-14 11:32:30,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:30,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:30,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:30,703 INFO 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 11:32:30,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:30,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934627507] [2024-06-14 11:32:30,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934627507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:30,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:30,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:32:30,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112999661] [2024-06-14 11:32:30,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:30,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:32:30,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:30,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:32:30,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:32:30,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:32:30,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 266 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:30,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:30,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:32:30,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:31,276 INFO L124 PetriNetUnfolderBase]: 3372/5077 cut-off events. [2024-06-14 11:32:31,276 INFO L125 PetriNetUnfolderBase]: For 6315/6366 co-relation queries the response was YES. [2024-06-14 11:32:31,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15120 conditions, 5077 events. 3372/5077 cut-off events. For 6315/6366 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 28307 event pairs, 1298 based on Foata normal form. 16/5064 useless extension candidates. Maximal degree in co-relation 15098. Up to 4533 conditions per place. [2024-06-14 11:32:31,300 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 57 selfloop transitions, 17 changer transitions 0/83 dead transitions. [2024-06-14 11:32:31,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 508 flow [2024-06-14 11:32:31,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:32:31,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:32:31,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-06-14 11:32:31,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.66 [2024-06-14 11:32:31,301 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 266 flow. Second operand 4 states and 132 transitions. [2024-06-14 11:32:31,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 508 flow [2024-06-14 11:32:31,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 83 transitions, 478 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 11:32:31,307 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 334 flow [2024-06-14 11:32:31,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=334, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-06-14 11:32:31,307 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 10 predicate places. [2024-06-14 11:32:31,308 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 334 flow [2024-06-14 11:32:31,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:31,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:31,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:31,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 11:32:31,308 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 11:32:31,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:31,309 INFO L85 PathProgramCache]: Analyzing trace with hash -167339921, now seen corresponding path program 2 times [2024-06-14 11:32:31,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:31,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737605236] [2024-06-14 11:32:31,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:31,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:31,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:31,449 INFO 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 11:32:31,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:31,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737605236] [2024-06-14 11:32:31,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737605236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:31,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:31,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:32:31,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943954634] [2024-06-14 11:32:31,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:31,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:32:31,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:31,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:32:31,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:32:31,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:32:31,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 334 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:31,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:31,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:32:31,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:31,958 INFO L124 PetriNetUnfolderBase]: 3363/5187 cut-off events. [2024-06-14 11:32:31,959 INFO L125 PetriNetUnfolderBase]: For 9840/10023 co-relation queries the response was YES. [2024-06-14 11:32:31,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17172 conditions, 5187 events. 3363/5187 cut-off events. For 9840/10023 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 29767 event pairs, 1431 based on Foata normal form. 18/5171 useless extension candidates. Maximal degree in co-relation 17149. Up to 4575 conditions per place. [2024-06-14 11:32:32,035 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 70 selfloop transitions, 20 changer transitions 0/99 dead transitions. [2024-06-14 11:32:32,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 99 transitions, 672 flow [2024-06-14 11:32:32,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:32:32,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:32:32,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-14 11:32:32,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.632 [2024-06-14 11:32:32,039 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 334 flow. Second operand 5 states and 158 transitions. [2024-06-14 11:32:32,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 99 transitions, 672 flow [2024-06-14 11:32:32,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 99 transitions, 606 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-14 11:32:32,053 INFO L231 Difference]: Finished difference. Result has 68 places, 73 transitions, 449 flow [2024-06-14 11:32:32,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=449, PETRI_PLACES=68, PETRI_TRANSITIONS=73} [2024-06-14 11:32:32,055 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 15 predicate places. [2024-06-14 11:32:32,055 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 73 transitions, 449 flow [2024-06-14 11:32:32,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:32,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:32,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:32,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 11:32:32,056 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 11:32:32,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:32,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1155763418, now seen corresponding path program 1 times [2024-06-14 11:32:32,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:32,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831937241] [2024-06-14 11:32:32,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:32,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:32,272 INFO 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 11:32:32,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:32,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831937241] [2024-06-14 11:32:32,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831937241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:32,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:32,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:32,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671392482] [2024-06-14 11:32:32,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:32,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:32,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:32,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:32,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:32,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:32:32,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 73 transitions, 449 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 11:32:32,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:32,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:32:32,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:32,996 INFO L124 PetriNetUnfolderBase]: 4824/7274 cut-off events. [2024-06-14 11:32:32,996 INFO L125 PetriNetUnfolderBase]: For 18241/18455 co-relation queries the response was YES. [2024-06-14 11:32:33,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25586 conditions, 7274 events. 4824/7274 cut-off events. For 18241/18455 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 43869 event pairs, 1097 based on Foata normal form. 104/7312 useless extension candidates. Maximal degree in co-relation 25560. Up to 4682 conditions per place. [2024-06-14 11:32:33,053 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 89 selfloop transitions, 34 changer transitions 0/132 dead transitions. [2024-06-14 11:32:33,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 132 transitions, 951 flow [2024-06-14 11:32:33,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:33,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:33,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 204 transitions. [2024-06-14 11:32:33,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-06-14 11:32:33,054 INFO L175 Difference]: Start difference. First operand has 68 places, 73 transitions, 449 flow. Second operand 6 states and 204 transitions. [2024-06-14 11:32:33,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 132 transitions, 951 flow [2024-06-14 11:32:33,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 132 transitions, 919 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-14 11:32:33,069 INFO L231 Difference]: Finished difference. Result has 75 places, 81 transitions, 596 flow [2024-06-14 11:32:33,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=596, PETRI_PLACES=75, PETRI_TRANSITIONS=81} [2024-06-14 11:32:33,070 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 22 predicate places. [2024-06-14 11:32:33,070 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 81 transitions, 596 flow [2024-06-14 11:32:33,070 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 11:32:33,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:33,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:33,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 11:32:33,071 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 11:32:33,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:33,071 INFO L85 PathProgramCache]: Analyzing trace with hash -546121448, now seen corresponding path program 2 times [2024-06-14 11:32:33,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:33,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465839030] [2024-06-14 11:32:33,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:33,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:33,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:33,276 INFO 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 11:32:33,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:33,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465839030] [2024-06-14 11:32:33,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465839030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:33,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:33,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:33,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292733357] [2024-06-14 11:32:33,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:33,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:33,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:33,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:33,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:33,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:32:33,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 81 transitions, 596 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 11:32:33,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:33,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:32:33,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:33,950 INFO L124 PetriNetUnfolderBase]: 4554/6934 cut-off events. [2024-06-14 11:32:33,951 INFO L125 PetriNetUnfolderBase]: For 24495/24729 co-relation queries the response was YES. [2024-06-14 11:32:33,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26099 conditions, 6934 events. 4554/6934 cut-off events. For 24495/24729 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 41837 event pairs, 1415 based on Foata normal form. 122/6984 useless extension candidates. Maximal degree in co-relation 26069. Up to 5428 conditions per place. [2024-06-14 11:32:33,987 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 79 selfloop transitions, 29 changer transitions 0/117 dead transitions. [2024-06-14 11:32:33,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 117 transitions, 942 flow [2024-06-14 11:32:33,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:32:33,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:32:33,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 166 transitions. [2024-06-14 11:32:33,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.664 [2024-06-14 11:32:33,989 INFO L175 Difference]: Start difference. First operand has 75 places, 81 transitions, 596 flow. Second operand 5 states and 166 transitions. [2024-06-14 11:32:33,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 117 transitions, 942 flow [2024-06-14 11:32:34,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 117 transitions, 890 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-14 11:32:34,011 INFO L231 Difference]: Finished difference. Result has 78 places, 83 transitions, 648 flow [2024-06-14 11:32:34,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=648, PETRI_PLACES=78, PETRI_TRANSITIONS=83} [2024-06-14 11:32:34,012 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 25 predicate places. [2024-06-14 11:32:34,012 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 83 transitions, 648 flow [2024-06-14 11:32:34,012 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 11:32:34,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:34,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:34,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 11:32:34,013 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 11:32:34,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:34,013 INFO L85 PathProgramCache]: Analyzing trace with hash 679773506, now seen corresponding path program 3 times [2024-06-14 11:32:34,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:34,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592181518] [2024-06-14 11:32:34,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:34,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:34,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:34,170 INFO 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 11:32:34,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:34,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592181518] [2024-06-14 11:32:34,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592181518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:34,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:34,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:34,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175950729] [2024-06-14 11:32:34,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:34,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:34,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:34,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:34,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:34,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:32:34,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 83 transitions, 648 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 11:32:34,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:34,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:32:34,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:34,826 INFO L124 PetriNetUnfolderBase]: 4631/7074 cut-off events. [2024-06-14 11:32:34,826 INFO L125 PetriNetUnfolderBase]: For 25173/25461 co-relation queries the response was YES. [2024-06-14 11:32:34,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27072 conditions, 7074 events. 4631/7074 cut-off events. For 25173/25461 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 42819 event pairs, 1615 based on Foata normal form. 34/7042 useless extension candidates. Maximal degree in co-relation 27040. Up to 6275 conditions per place. [2024-06-14 11:32:34,873 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 91 selfloop transitions, 22 changer transitions 0/122 dead transitions. [2024-06-14 11:32:34,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 122 transitions, 1002 flow [2024-06-14 11:32:34,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:34,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:34,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-14 11:32:34,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6266666666666667 [2024-06-14 11:32:34,875 INFO L175 Difference]: Start difference. First operand has 78 places, 83 transitions, 648 flow. Second operand 6 states and 188 transitions. [2024-06-14 11:32:34,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 122 transitions, 1002 flow [2024-06-14 11:32:34,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 122 transitions, 954 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-14 11:32:34,910 INFO L231 Difference]: Finished difference. Result has 81 places, 85 transitions, 684 flow [2024-06-14 11:32:34,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=684, PETRI_PLACES=81, PETRI_TRANSITIONS=85} [2024-06-14 11:32:34,911 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 28 predicate places. [2024-06-14 11:32:34,911 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 85 transitions, 684 flow [2024-06-14 11:32:34,911 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 11:32:34,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:34,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:34,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 11:32:34,912 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 11:32:34,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:34,912 INFO L85 PathProgramCache]: Analyzing trace with hash 679957956, now seen corresponding path program 1 times [2024-06-14 11:32:34,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:34,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145318998] [2024-06-14 11:32:34,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:34,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:34,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:35,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:35,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:35,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145318998] [2024-06-14 11:32:35,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145318998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:35,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:35,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:35,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30362193] [2024-06-14 11:32:35,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:35,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:35,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:35,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:35,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:35,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:32:35,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 85 transitions, 684 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 11:32:35,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:35,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:32:35,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:35,817 INFO L124 PetriNetUnfolderBase]: 4592/7017 cut-off events. [2024-06-14 11:32:35,817 INFO L125 PetriNetUnfolderBase]: For 27468/27756 co-relation queries the response was YES. [2024-06-14 11:32:35,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27212 conditions, 7017 events. 4592/7017 cut-off events. For 27468/27756 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 42383 event pairs, 1399 based on Foata normal form. 28/6979 useless extension candidates. Maximal degree in co-relation 27179. Up to 5876 conditions per place. [2024-06-14 11:32:35,855 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 91 selfloop transitions, 28 changer transitions 0/128 dead transitions. [2024-06-14 11:32:35,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 128 transitions, 1065 flow [2024-06-14 11:32:35,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:35,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:35,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-14 11:32:35,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-14 11:32:35,856 INFO L175 Difference]: Start difference. First operand has 81 places, 85 transitions, 684 flow. Second operand 6 states and 190 transitions. [2024-06-14 11:32:35,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 128 transitions, 1065 flow [2024-06-14 11:32:35,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 128 transitions, 1011 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 11:32:35,886 INFO L231 Difference]: Finished difference. Result has 83 places, 87 transitions, 738 flow [2024-06-14 11:32:35,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=738, PETRI_PLACES=83, PETRI_TRANSITIONS=87} [2024-06-14 11:32:35,887 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 30 predicate places. [2024-06-14 11:32:35,887 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 87 transitions, 738 flow [2024-06-14 11:32:35,887 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 11:32:35,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:35,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:35,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 11:32:35,888 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 11:32:35,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:35,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1703392822, now seen corresponding path program 1 times [2024-06-14 11:32:35,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:35,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56482261] [2024-06-14 11:32:35,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:35,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:36,028 INFO 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 11:32:36,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:36,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56482261] [2024-06-14 11:32:36,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56482261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:36,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:36,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:32:36,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887870544] [2024-06-14 11:32:36,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:36,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:32:36,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:36,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:32:36,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:32:36,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 11:32:36,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 87 transitions, 738 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 11:32:36,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:36,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 11:32:36,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:36,455 INFO L124 PetriNetUnfolderBase]: 3701/5679 cut-off events. [2024-06-14 11:32:36,456 INFO L125 PetriNetUnfolderBase]: For 26485/26706 co-relation queries the response was YES. [2024-06-14 11:32:36,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23361 conditions, 5679 events. 3701/5679 cut-off events. For 26485/26706 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 33961 event pairs, 1373 based on Foata normal form. 6/5626 useless extension candidates. Maximal degree in co-relation 23326. Up to 5213 conditions per place. [2024-06-14 11:32:36,491 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 89 selfloop transitions, 20 changer transitions 0/119 dead transitions. [2024-06-14 11:32:36,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 119 transitions, 1112 flow [2024-06-14 11:32:36,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:32:36,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:32:36,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-14 11:32:36,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-14 11:32:36,493 INFO L175 Difference]: Start difference. First operand has 83 places, 87 transitions, 738 flow. Second operand 5 states and 155 transitions. [2024-06-14 11:32:36,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 119 transitions, 1112 flow [2024-06-14 11:32:36,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 119 transitions, 1053 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 11:32:36,525 INFO L231 Difference]: Finished difference. Result has 87 places, 98 transitions, 868 flow [2024-06-14 11:32:36,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=868, PETRI_PLACES=87, PETRI_TRANSITIONS=98} [2024-06-14 11:32:36,526 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 34 predicate places. [2024-06-14 11:32:36,526 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 98 transitions, 868 flow [2024-06-14 11:32:36,526 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 11:32:36,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:36,527 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 11:32:36,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 11:32:36,527 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:32:36,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:36,527 INFO L85 PathProgramCache]: Analyzing trace with hash 260177026, now seen corresponding path program 1 times [2024-06-14 11:32:36,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:36,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396104978] [2024-06-14 11:32:36,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:36,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:36,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:36,759 INFO 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 11:32:36,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:36,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396104978] [2024-06-14 11:32:36,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396104978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:36,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:36,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:32:36,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974881762] [2024-06-14 11:32:36,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:36,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:32:36,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:36,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:32:36,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:32:36,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 11:32:36,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 98 transitions, 868 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:36,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:36,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 11:32:36,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:37,381 INFO L124 PetriNetUnfolderBase]: 5235/7922 cut-off events. [2024-06-14 11:32:37,382 INFO L125 PetriNetUnfolderBase]: For 41689/41796 co-relation queries the response was YES. [2024-06-14 11:32:37,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31932 conditions, 7922 events. 5235/7922 cut-off events. For 41689/41796 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 48613 event pairs, 1984 based on Foata normal form. 13/7779 useless extension candidates. Maximal degree in co-relation 31894. Up to 7087 conditions per place. [2024-06-14 11:32:37,432 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 78 selfloop transitions, 11 changer transitions 0/119 dead transitions. [2024-06-14 11:32:37,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 119 transitions, 1144 flow [2024-06-14 11:32:37,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:32:37,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:32:37,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-06-14 11:32:37,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 11:32:37,433 INFO L175 Difference]: Start difference. First operand has 87 places, 98 transitions, 868 flow. Second operand 4 states and 120 transitions. [2024-06-14 11:32:37,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 119 transitions, 1144 flow [2024-06-14 11:32:37,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 119 transitions, 1102 flow, removed 21 selfloop flow, removed 0 redundant places. [2024-06-14 11:32:37,502 INFO L231 Difference]: Finished difference. Result has 92 places, 108 transitions, 949 flow [2024-06-14 11:32:37,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=949, PETRI_PLACES=92, PETRI_TRANSITIONS=108} [2024-06-14 11:32:37,503 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 39 predicate places. [2024-06-14 11:32:37,503 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 108 transitions, 949 flow [2024-06-14 11:32:37,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:37,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:37,503 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 11:32:37,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 11:32:37,504 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:32:37,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:37,504 INFO L85 PathProgramCache]: Analyzing trace with hash -580774871, now seen corresponding path program 1 times [2024-06-14 11:32:37,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:37,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852716859] [2024-06-14 11:32:37,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:37,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:37,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:37,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:37,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:37,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852716859] [2024-06-14 11:32:37,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852716859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:37,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:37,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:32:37,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600698562] [2024-06-14 11:32:37,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:37,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:32:37,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:37,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:32:37,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:32:37,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 11:32:37,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 108 transitions, 949 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 11:32:37,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:37,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 11:32:37,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:38,241 INFO L124 PetriNetUnfolderBase]: 4484/6959 cut-off events. [2024-06-14 11:32:38,241 INFO L125 PetriNetUnfolderBase]: For 42622/42940 co-relation queries the response was YES. [2024-06-14 11:32:38,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30874 conditions, 6959 events. 4484/6959 cut-off events. For 42622/42940 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 43192 event pairs, 1425 based on Foata normal form. 52/6941 useless extension candidates. Maximal degree in co-relation 30832. Up to 5675 conditions per place. [2024-06-14 11:32:38,292 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 104 selfloop transitions, 32 changer transitions 0/150 dead transitions. [2024-06-14 11:32:38,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 150 transitions, 1456 flow [2024-06-14 11:32:38,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:38,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:38,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-14 11:32:38,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-14 11:32:38,293 INFO L175 Difference]: Start difference. First operand has 92 places, 108 transitions, 949 flow. Second operand 6 states and 190 transitions. [2024-06-14 11:32:38,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 150 transitions, 1456 flow [2024-06-14 11:32:38,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 150 transitions, 1452 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-14 11:32:38,381 INFO L231 Difference]: Finished difference. Result has 99 places, 113 transitions, 1119 flow [2024-06-14 11:32:38,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=945, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1119, PETRI_PLACES=99, PETRI_TRANSITIONS=113} [2024-06-14 11:32:38,382 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 46 predicate places. [2024-06-14 11:32:38,382 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 113 transitions, 1119 flow [2024-06-14 11:32:38,383 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 11:32:38,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:38,383 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 11:32:38,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 11:32:38,383 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:32:38,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:38,384 INFO L85 PathProgramCache]: Analyzing trace with hash -580714421, now seen corresponding path program 2 times [2024-06-14 11:32:38,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:38,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437043759] [2024-06-14 11:32:38,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:38,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:38,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:38,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:38,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437043759] [2024-06-14 11:32:38,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437043759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:38,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:38,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:32:38,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454903354] [2024-06-14 11:32:38,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:38,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:32:38,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:38,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:32:38,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:32:38,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 11:32:38,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 113 transitions, 1119 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 11:32:38,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:38,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 11:32:38,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:39,131 INFO L124 PetriNetUnfolderBase]: 4412/6869 cut-off events. [2024-06-14 11:32:39,131 INFO L125 PetriNetUnfolderBase]: For 48146/48464 co-relation queries the response was YES. [2024-06-14 11:32:39,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31285 conditions, 6869 events. 4412/6869 cut-off events. For 48146/48464 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 42869 event pairs, 1542 based on Foata normal form. 60/6859 useless extension candidates. Maximal degree in co-relation 31239. Up to 6043 conditions per place. [2024-06-14 11:32:39,204 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 102 selfloop transitions, 26 changer transitions 0/142 dead transitions. [2024-06-14 11:32:39,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 142 transitions, 1459 flow [2024-06-14 11:32:39,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:39,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:39,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-14 11:32:39,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-06-14 11:32:39,206 INFO L175 Difference]: Start difference. First operand has 99 places, 113 transitions, 1119 flow. Second operand 6 states and 183 transitions. [2024-06-14 11:32:39,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 142 transitions, 1459 flow [2024-06-14 11:32:39,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 142 transitions, 1377 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-14 11:32:39,324 INFO L231 Difference]: Finished difference. Result has 102 places, 113 transitions, 1097 flow [2024-06-14 11:32:39,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1097, PETRI_PLACES=102, PETRI_TRANSITIONS=113} [2024-06-14 11:32:39,325 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 49 predicate places. [2024-06-14 11:32:39,325 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 113 transitions, 1097 flow [2024-06-14 11:32:39,326 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 11:32:39,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:39,326 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 11:32:39,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 11:32:39,326 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:32:39,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:39,327 INFO L85 PathProgramCache]: Analyzing trace with hash -304391433, now seen corresponding path program 1 times [2024-06-14 11:32:39,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:39,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493304705] [2024-06-14 11:32:39,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:39,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:39,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:39,493 INFO 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 11:32:39,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:39,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493304705] [2024-06-14 11:32:39,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493304705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:39,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:39,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:39,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182304204] [2024-06-14 11:32:39,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:39,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:39,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:39,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:39,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:39,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:32:39,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 113 transitions, 1097 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 11:32:39,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:39,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:32:39,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:40,206 INFO L124 PetriNetUnfolderBase]: 5417/8126 cut-off events. [2024-06-14 11:32:40,206 INFO L125 PetriNetUnfolderBase]: For 53881/54166 co-relation queries the response was YES. [2024-06-14 11:32:40,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36571 conditions, 8126 events. 5417/8126 cut-off events. For 53881/54166 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 49172 event pairs, 1736 based on Foata normal form. 36/8063 useless extension candidates. Maximal degree in co-relation 36524. Up to 7342 conditions per place. [2024-06-14 11:32:40,259 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 89 selfloop transitions, 41 changer transitions 0/141 dead transitions. [2024-06-14 11:32:40,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 141 transitions, 1469 flow [2024-06-14 11:32:40,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:32:40,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:32:40,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-06-14 11:32:40,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.628 [2024-06-14 11:32:40,261 INFO L175 Difference]: Start difference. First operand has 102 places, 113 transitions, 1097 flow. Second operand 5 states and 157 transitions. [2024-06-14 11:32:40,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 141 transitions, 1469 flow [2024-06-14 11:32:40,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 141 transitions, 1413 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-14 11:32:40,341 INFO L231 Difference]: Finished difference. Result has 103 places, 117 transitions, 1191 flow [2024-06-14 11:32:40,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1041, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1191, PETRI_PLACES=103, PETRI_TRANSITIONS=117} [2024-06-14 11:32:40,341 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 50 predicate places. [2024-06-14 11:32:40,341 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 117 transitions, 1191 flow [2024-06-14 11:32:40,341 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 11:32:40,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:40,342 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 11:32:40,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 11:32:40,342 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:32:40,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:40,342 INFO L85 PathProgramCache]: Analyzing trace with hash -189100263, now seen corresponding path program 2 times [2024-06-14 11:32:40,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:40,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963344475] [2024-06-14 11:32:40,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:40,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:40,526 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 11:32:40,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:40,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963344475] [2024-06-14 11:32:40,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963344475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:40,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:40,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:40,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826653997] [2024-06-14 11:32:40,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:40,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:40,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:40,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:40,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:40,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:32:40,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 117 transitions, 1191 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 11:32:40,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:40,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:32:40,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:41,295 INFO L124 PetriNetUnfolderBase]: 5484/8231 cut-off events. [2024-06-14 11:32:41,296 INFO L125 PetriNetUnfolderBase]: For 62575/62990 co-relation queries the response was YES. [2024-06-14 11:32:41,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38995 conditions, 8231 events. 5484/8231 cut-off events. For 62575/62990 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 49827 event pairs, 1740 based on Foata normal form. 66/8200 useless extension candidates. Maximal degree in co-relation 38947. Up to 7386 conditions per place. [2024-06-14 11:32:41,352 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 95 selfloop transitions, 51 changer transitions 0/157 dead transitions. [2024-06-14 11:32:41,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 157 transitions, 1729 flow [2024-06-14 11:32:41,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:41,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:41,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-14 11:32:41,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-14 11:32:41,353 INFO L175 Difference]: Start difference. First operand has 103 places, 117 transitions, 1191 flow. Second operand 6 states and 186 transitions. [2024-06-14 11:32:41,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 157 transitions, 1729 flow [2024-06-14 11:32:41,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 157 transitions, 1627 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-14 11:32:41,450 INFO L231 Difference]: Finished difference. Result has 106 places, 125 transitions, 1316 flow [2024-06-14 11:32:41,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1316, PETRI_PLACES=106, PETRI_TRANSITIONS=125} [2024-06-14 11:32:41,451 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 53 predicate places. [2024-06-14 11:32:41,451 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 125 transitions, 1316 flow [2024-06-14 11:32:41,451 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 11:32:41,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:41,452 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 11:32:41,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 11:32:41,452 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:32:41,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:41,453 INFO L85 PathProgramCache]: Analyzing trace with hash -188831493, now seen corresponding path program 3 times [2024-06-14 11:32:41,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:41,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114143242] [2024-06-14 11:32:41,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:41,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:41,607 INFO 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 11:32:41,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:41,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114143242] [2024-06-14 11:32:41,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114143242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:41,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:41,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:41,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342975007] [2024-06-14 11:32:41,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:41,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:41,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:41,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:41,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:41,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:32:41,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 125 transitions, 1316 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 11:32:41,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:41,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:32:41,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:42,468 INFO L124 PetriNetUnfolderBase]: 5500/8257 cut-off events. [2024-06-14 11:32:42,468 INFO L125 PetriNetUnfolderBase]: For 73048/73470 co-relation queries the response was YES. [2024-06-14 11:32:42,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41106 conditions, 8257 events. 5500/8257 cut-off events. For 73048/73470 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 50089 event pairs, 1740 based on Foata normal form. 79/8239 useless extension candidates. Maximal degree in co-relation 41057. Up to 7403 conditions per place. [2024-06-14 11:32:42,538 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 93 selfloop transitions, 55 changer transitions 0/159 dead transitions. [2024-06-14 11:32:42,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 159 transitions, 1812 flow [2024-06-14 11:32:42,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:42,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:42,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-14 11:32:42,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6133333333333333 [2024-06-14 11:32:42,540 INFO L175 Difference]: Start difference. First operand has 106 places, 125 transitions, 1316 flow. Second operand 6 states and 184 transitions. [2024-06-14 11:32:42,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 159 transitions, 1812 flow [2024-06-14 11:32:42,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 159 transitions, 1713 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-14 11:32:42,691 INFO L231 Difference]: Finished difference. Result has 110 places, 129 transitions, 1398 flow [2024-06-14 11:32:42,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1398, PETRI_PLACES=110, PETRI_TRANSITIONS=129} [2024-06-14 11:32:42,692 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 57 predicate places. [2024-06-14 11:32:42,692 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 129 transitions, 1398 flow [2024-06-14 11:32:42,692 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 11:32:42,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:42,693 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 11:32:42,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 11:32:42,693 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:32:42,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:42,693 INFO L85 PathProgramCache]: Analyzing trace with hash 341305113, now seen corresponding path program 4 times [2024-06-14 11:32:42,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:42,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307674306] [2024-06-14 11:32:42,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:42,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:42,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:42,859 INFO 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 11:32:42,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:42,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307674306] [2024-06-14 11:32:42,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307674306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:42,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:42,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:32:42,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450808118] [2024-06-14 11:32:42,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:42,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:32:42,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:42,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:32:42,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:32:42,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:32:42,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 129 transitions, 1398 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 11:32:42,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:42,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:32:42,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:43,717 INFO L124 PetriNetUnfolderBase]: 5458/8195 cut-off events. [2024-06-14 11:32:43,717 INFO L125 PetriNetUnfolderBase]: For 77086/77493 co-relation queries the response was YES. [2024-06-14 11:32:43,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41208 conditions, 8195 events. 5458/8195 cut-off events. For 77086/77493 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 49693 event pairs, 1736 based on Foata normal form. 26/8124 useless extension candidates. Maximal degree in co-relation 41157. Up to 7400 conditions per place. [2024-06-14 11:32:43,787 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 103 selfloop transitions, 41 changer transitions 0/155 dead transitions. [2024-06-14 11:32:43,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 155 transitions, 1756 flow [2024-06-14 11:32:43,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:32:43,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:32:43,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-06-14 11:32:43,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.636 [2024-06-14 11:32:43,789 INFO L175 Difference]: Start difference. First operand has 110 places, 129 transitions, 1398 flow. Second operand 5 states and 159 transitions. [2024-06-14 11:32:43,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 155 transitions, 1756 flow [2024-06-14 11:32:43,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 155 transitions, 1601 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-14 11:32:43,991 INFO L231 Difference]: Finished difference. Result has 112 places, 129 transitions, 1339 flow [2024-06-14 11:32:43,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1339, PETRI_PLACES=112, PETRI_TRANSITIONS=129} [2024-06-14 11:32:43,992 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 59 predicate places. [2024-06-14 11:32:43,992 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 129 transitions, 1339 flow [2024-06-14 11:32:43,992 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 11:32:43,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:43,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:43,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 11:32:43,993 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:32:43,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:43,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1171899383, now seen corresponding path program 1 times [2024-06-14 11:32:43,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:43,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759632506] [2024-06-14 11:32:43,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:43,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:44,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:44,199 INFO 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 11:32:44,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:44,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759632506] [2024-06-14 11:32:44,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759632506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:44,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:44,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:32:44,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376693974] [2024-06-14 11:32:44,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:44,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:32:44,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:44,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:32:44,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:32:44,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 11:32:44,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 129 transitions, 1339 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 11:32:44,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:44,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 11:32:44,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:44,936 INFO L124 PetriNetUnfolderBase]: 5402/8121 cut-off events. [2024-06-14 11:32:44,937 INFO L125 PetriNetUnfolderBase]: For 87867/87990 co-relation queries the response was YES. [2024-06-14 11:32:44,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39952 conditions, 8121 events. 5402/8121 cut-off events. For 87867/87990 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 49638 event pairs, 1832 based on Foata normal form. 19/7959 useless extension candidates. Maximal degree in co-relation 39900. Up to 7236 conditions per place. [2024-06-14 11:32:44,998 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 89 selfloop transitions, 27 changer transitions 0/148 dead transitions. [2024-06-14 11:32:44,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 148 transitions, 1651 flow [2024-06-14 11:32:44,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:32:44,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:32:44,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-06-14 11:32:45,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-14 11:32:45,000 INFO L175 Difference]: Start difference. First operand has 112 places, 129 transitions, 1339 flow. Second operand 4 states and 124 transitions. [2024-06-14 11:32:45,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 148 transitions, 1651 flow [2024-06-14 11:32:45,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 148 transitions, 1536 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 11:32:45,138 INFO L231 Difference]: Finished difference. Result has 111 places, 135 transitions, 1352 flow [2024-06-14 11:32:45,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1352, PETRI_PLACES=111, PETRI_TRANSITIONS=135} [2024-06-14 11:32:45,140 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 58 predicate places. [2024-06-14 11:32:45,140 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 135 transitions, 1352 flow [2024-06-14 11:32:45,140 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 11:32:45,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:45,140 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 11:32:45,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 11:32:45,140 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:32:45,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:45,141 INFO L85 PathProgramCache]: Analyzing trace with hash -2138120553, now seen corresponding path program 2 times [2024-06-14 11:32:45,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:45,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727720849] [2024-06-14 11:32:45,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:45,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:45,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:45,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:45,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727720849] [2024-06-14 11:32:45,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727720849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:45,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:45,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:32:45,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406965500] [2024-06-14 11:32:45,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:45,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:32:45,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:45,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:32:45,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:32:45,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 11:32:45,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 135 transitions, 1352 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 11:32:45,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:45,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 11:32:45,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:46,030 INFO L124 PetriNetUnfolderBase]: 5381/8133 cut-off events. [2024-06-14 11:32:46,030 INFO L125 PetriNetUnfolderBase]: For 94448/94571 co-relation queries the response was YES. [2024-06-14 11:32:46,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42149 conditions, 8133 events. 5381/8133 cut-off events. For 94448/94571 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 50079 event pairs, 1820 based on Foata normal form. 16/7971 useless extension candidates. Maximal degree in co-relation 42096. Up to 7255 conditions per place. [2024-06-14 11:32:46,098 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 99 selfloop transitions, 29 changer transitions 0/160 dead transitions. [2024-06-14 11:32:46,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 160 transitions, 1783 flow [2024-06-14 11:32:46,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:32:46,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:32:46,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2024-06-14 11:32:46,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-14 11:32:46,100 INFO L175 Difference]: Start difference. First operand has 111 places, 135 transitions, 1352 flow. Second operand 5 states and 145 transitions. [2024-06-14 11:32:46,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 160 transitions, 1783 flow [2024-06-14 11:32:46,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 160 transitions, 1692 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-14 11:32:46,280 INFO L231 Difference]: Finished difference. Result has 116 places, 148 transitions, 1526 flow [2024-06-14 11:32:46,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1526, PETRI_PLACES=116, PETRI_TRANSITIONS=148} [2024-06-14 11:32:46,281 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 63 predicate places. [2024-06-14 11:32:46,281 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 148 transitions, 1526 flow [2024-06-14 11:32:46,281 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 11:32:46,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:46,281 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 11:32:46,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 11:32:46,282 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:32:46,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:46,282 INFO L85 PathProgramCache]: Analyzing trace with hash 2145918633, now seen corresponding path program 1 times [2024-06-14 11:32:46,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:46,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004676207] [2024-06-14 11:32:46,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:46,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:46,402 INFO 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 11:32:46,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:46,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004676207] [2024-06-14 11:32:46,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004676207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:46,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:46,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:32:46,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356208546] [2024-06-14 11:32:46,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:46,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:32:46,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:46,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:32:46,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:32:46,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:32:46,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 148 transitions, 1526 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:46,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:46,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:32:46,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:47,159 INFO L124 PetriNetUnfolderBase]: 5943/8855 cut-off events. [2024-06-14 11:32:47,160 INFO L125 PetriNetUnfolderBase]: For 93147/93147 co-relation queries the response was YES. [2024-06-14 11:32:47,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46585 conditions, 8855 events. 5943/8855 cut-off events. For 93147/93147 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 52502 event pairs, 1941 based on Foata normal form. 1/8853 useless extension candidates. Maximal degree in co-relation 46529. Up to 8299 conditions per place. [2024-06-14 11:32:47,233 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 157 selfloop transitions, 19 changer transitions 0/184 dead transitions. [2024-06-14 11:32:47,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 184 transitions, 2157 flow [2024-06-14 11:32:47,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:32:47,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:32:47,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-06-14 11:32:47,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.576 [2024-06-14 11:32:47,250 INFO L175 Difference]: Start difference. First operand has 116 places, 148 transitions, 1526 flow. Second operand 5 states and 144 transitions. [2024-06-14 11:32:47,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 184 transitions, 2157 flow [2024-06-14 11:32:47,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 184 transitions, 2115 flow, removed 21 selfloop flow, removed 0 redundant places. [2024-06-14 11:32:47,692 INFO L231 Difference]: Finished difference. Result has 123 places, 165 transitions, 1765 flow [2024-06-14 11:32:47,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1484, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1765, PETRI_PLACES=123, PETRI_TRANSITIONS=165} [2024-06-14 11:32:47,692 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 70 predicate places. [2024-06-14 11:32:47,692 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 165 transitions, 1765 flow [2024-06-14 11:32:47,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:47,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:47,693 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 11:32:47,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 11:32:47,693 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:32:47,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:47,693 INFO L85 PathProgramCache]: Analyzing trace with hash 970593529, now seen corresponding path program 2 times [2024-06-14 11:32:47,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:47,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445014076] [2024-06-14 11:32:47,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:47,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:47,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:47,875 INFO 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 11:32:47,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:47,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445014076] [2024-06-14 11:32:47,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445014076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:47,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:47,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:32:47,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124610348] [2024-06-14 11:32:47,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:47,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:32:47,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:47,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:32:47,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:32:47,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:32:47,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 165 transitions, 1765 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:47,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:47,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:32:47,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:48,675 INFO L124 PetriNetUnfolderBase]: 5939/8846 cut-off events. [2024-06-14 11:32:48,676 INFO L125 PetriNetUnfolderBase]: For 103082/103082 co-relation queries the response was YES. [2024-06-14 11:32:48,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48267 conditions, 8846 events. 5939/8846 cut-off events. For 103082/103082 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 52401 event pairs, 1947 based on Foata normal form. 1/8844 useless extension candidates. Maximal degree in co-relation 48206. Up to 8295 conditions per place. [2024-06-14 11:32:48,754 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 150 selfloop transitions, 20 changer transitions 0/178 dead transitions. [2024-06-14 11:32:48,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 178 transitions, 2144 flow [2024-06-14 11:32:48,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:32:48,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:32:48,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-14 11:32:48,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.548 [2024-06-14 11:32:48,755 INFO L175 Difference]: Start difference. First operand has 123 places, 165 transitions, 1765 flow. Second operand 5 states and 137 transitions. [2024-06-14 11:32:48,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 178 transitions, 2144 flow [2024-06-14 11:32:49,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 178 transitions, 2080 flow, removed 32 selfloop flow, removed 0 redundant places. [2024-06-14 11:32:49,080 INFO L231 Difference]: Finished difference. Result has 128 places, 166 transitions, 1757 flow [2024-06-14 11:32:49,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1705, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1757, PETRI_PLACES=128, PETRI_TRANSITIONS=166} [2024-06-14 11:32:49,081 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 75 predicate places. [2024-06-14 11:32:49,081 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 166 transitions, 1757 flow [2024-06-14 11:32:49,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:49,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:49,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:49,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 11:32:49,081 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:32:49,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:49,082 INFO L85 PathProgramCache]: Analyzing trace with hash -518636055, now seen corresponding path program 1 times [2024-06-14 11:32:49,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:49,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145655] [2024-06-14 11:32:49,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:49,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:49,205 INFO 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 11:32:49,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:49,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145655] [2024-06-14 11:32:49,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:49,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:49,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:32:49,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594903178] [2024-06-14 11:32:49,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:49,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:32:49,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:49,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:32:49,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:32:49,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 11:32:49,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 166 transitions, 1757 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 11:32:49,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:49,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 11:32:49,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:50,027 INFO L124 PetriNetUnfolderBase]: 5419/8225 cut-off events. [2024-06-14 11:32:50,028 INFO L125 PetriNetUnfolderBase]: For 107918/107928 co-relation queries the response was YES. [2024-06-14 11:32:50,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44982 conditions, 8225 events. 5419/8225 cut-off events. For 107918/107928 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 50363 event pairs, 1875 based on Foata normal form. 14/8100 useless extension candidates. Maximal degree in co-relation 44918. Up to 7271 conditions per place. [2024-06-14 11:32:50,117 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 127 selfloop transitions, 18 changer transitions 0/182 dead transitions. [2024-06-14 11:32:50,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 182 transitions, 2105 flow [2024-06-14 11:32:50,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:32:50,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:32:50,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-14 11:32:50,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.572 [2024-06-14 11:32:50,119 INFO L175 Difference]: Start difference. First operand has 128 places, 166 transitions, 1757 flow. Second operand 5 states and 143 transitions. [2024-06-14 11:32:50,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 182 transitions, 2105 flow [2024-06-14 11:32:50,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 182 transitions, 2070 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-14 11:32:50,369 INFO L231 Difference]: Finished difference. Result has 132 places, 169 transitions, 1797 flow [2024-06-14 11:32:50,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1722, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1797, PETRI_PLACES=132, PETRI_TRANSITIONS=169} [2024-06-14 11:32:50,370 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 79 predicate places. [2024-06-14 11:32:50,370 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 169 transitions, 1797 flow [2024-06-14 11:32:50,370 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 11:32:50,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:50,370 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 11:32:50,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 11:32:50,371 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:32:50,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:50,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1095477370, now seen corresponding path program 1 times [2024-06-14 11:32:50,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:50,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066006652] [2024-06-14 11:32:50,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:50,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:50,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:50,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:50,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066006652] [2024-06-14 11:32:50,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066006652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:50,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:50,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:32:50,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353419709] [2024-06-14 11:32:50,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:50,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:32:50,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:50,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:32:50,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:32:50,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:32:50,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 169 transitions, 1797 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 11:32:50,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:50,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:32:50,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:51,390 INFO L124 PetriNetUnfolderBase]: 5644/8525 cut-off events. [2024-06-14 11:32:51,391 INFO L125 PetriNetUnfolderBase]: For 114530/114535 co-relation queries the response was YES. [2024-06-14 11:32:51,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47737 conditions, 8525 events. 5644/8525 cut-off events. For 114530/114535 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 51479 event pairs, 1938 based on Foata normal form. 6/8489 useless extension candidates. Maximal degree in co-relation 47671. Up to 7745 conditions per place. [2024-06-14 11:32:51,468 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 146 selfloop transitions, 26 changer transitions 0/192 dead transitions. [2024-06-14 11:32:51,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 192 transitions, 2280 flow [2024-06-14 11:32:51,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:32:51,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:32:51,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-14 11:32:51,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.572 [2024-06-14 11:32:51,469 INFO L175 Difference]: Start difference. First operand has 132 places, 169 transitions, 1797 flow. Second operand 5 states and 143 transitions. [2024-06-14 11:32:51,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 192 transitions, 2280 flow [2024-06-14 11:32:51,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 192 transitions, 2239 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-14 11:32:51,812 INFO L231 Difference]: Finished difference. Result has 137 places, 180 transitions, 1969 flow [2024-06-14 11:32:51,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1756, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1969, PETRI_PLACES=137, PETRI_TRANSITIONS=180} [2024-06-14 11:32:51,812 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 84 predicate places. [2024-06-14 11:32:51,812 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 180 transitions, 1969 flow [2024-06-14 11:32:51,813 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 11:32:51,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:51,813 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 11:32:51,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 11:32:51,813 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 11:32:51,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:51,813 INFO L85 PathProgramCache]: Analyzing trace with hash -957432802, now seen corresponding path program 1 times [2024-06-14 11:32:51,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:51,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662710339] [2024-06-14 11:32:51,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:51,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:51,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:51,998 INFO 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 11:32:51,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:51,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662710339] [2024-06-14 11:32:51,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662710339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:51,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:51,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:32:51,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759751848] [2024-06-14 11:32:51,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:51,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:32:52,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:52,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:32:52,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:32:52,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:32:52,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 180 transitions, 1969 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 11:32:52,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:52,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:32:52,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:53,169 INFO L124 PetriNetUnfolderBase]: 6515/10013 cut-off events. [2024-06-14 11:32:53,169 INFO L125 PetriNetUnfolderBase]: For 173329/173897 co-relation queries the response was YES. [2024-06-14 11:32:53,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60250 conditions, 10013 events. 6515/10013 cut-off events. For 173329/173897 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 64646 event pairs, 1263 based on Foata normal form. 112/9940 useless extension candidates. Maximal degree in co-relation 60180. Up to 5174 conditions per place. [2024-06-14 11:32:53,275 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 159 selfloop transitions, 70 changer transitions 0/244 dead transitions. [2024-06-14 11:32:53,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 244 transitions, 2947 flow [2024-06-14 11:32:53,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:32:53,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:32:53,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 230 transitions. [2024-06-14 11:32:53,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-14 11:32:53,277 INFO L175 Difference]: Start difference. First operand has 137 places, 180 transitions, 1969 flow. Second operand 7 states and 230 transitions. [2024-06-14 11:32:53,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 244 transitions, 2947 flow [2024-06-14 11:32:53,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 244 transitions, 2905 flow, removed 21 selfloop flow, removed 0 redundant places. [2024-06-14 11:32:53,737 INFO L231 Difference]: Finished difference. Result has 145 places, 185 transitions, 2209 flow [2024-06-14 11:32:53,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1927, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2209, PETRI_PLACES=145, PETRI_TRANSITIONS=185} [2024-06-14 11:32:53,738 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 92 predicate places. [2024-06-14 11:32:53,738 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 185 transitions, 2209 flow [2024-06-14 11:32:53,738 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 11:32:53,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:53,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:53,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 11:32:53,738 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 11:32:53,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:53,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1666592478, now seen corresponding path program 2 times [2024-06-14 11:32:53,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:53,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552518199] [2024-06-14 11:32:53,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:53,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:53,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:53,903 INFO 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 11:32:53,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:53,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552518199] [2024-06-14 11:32:53,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552518199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:53,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:53,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:32:53,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561117949] [2024-06-14 11:32:53,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:53,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:32:53,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:53,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:32:53,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:32:53,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:32:53,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 185 transitions, 2209 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 11:32:53,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:53,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:32:53,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:55,009 INFO L124 PetriNetUnfolderBase]: 6392/9845 cut-off events. [2024-06-14 11:32:55,010 INFO L125 PetriNetUnfolderBase]: For 178634/179183 co-relation queries the response was YES. [2024-06-14 11:32:55,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60740 conditions, 9845 events. 6392/9845 cut-off events. For 178634/179183 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 63256 event pairs, 1611 based on Foata normal form. 56/9712 useless extension candidates. Maximal degree in co-relation 60666. Up to 8191 conditions per place. [2024-06-14 11:32:55,107 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 175 selfloop transitions, 33 changer transitions 0/223 dead transitions. [2024-06-14 11:32:55,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 223 transitions, 2793 flow [2024-06-14 11:32:55,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:55,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:55,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-14 11:32:55,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-14 11:32:55,109 INFO L175 Difference]: Start difference. First operand has 145 places, 185 transitions, 2209 flow. Second operand 6 states and 185 transitions. [2024-06-14 11:32:55,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 223 transitions, 2793 flow [2024-06-14 11:32:55,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 223 transitions, 2713 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 11:32:55,676 INFO L231 Difference]: Finished difference. Result has 149 places, 185 transitions, 2201 flow [2024-06-14 11:32:55,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2129, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2201, PETRI_PLACES=149, PETRI_TRANSITIONS=185} [2024-06-14 11:32:55,677 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 96 predicate places. [2024-06-14 11:32:55,677 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 185 transitions, 2201 flow [2024-06-14 11:32:55,677 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 11:32:55,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:55,677 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 11:32:55,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 11:32:55,678 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 11:32:55,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:55,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1644752734, now seen corresponding path program 3 times [2024-06-14 11:32:55,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:55,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148196014] [2024-06-14 11:32:55,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:55,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:55,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:55,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:55,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:55,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148196014] [2024-06-14 11:32:55,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148196014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:55,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:55,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:32:55,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147475524] [2024-06-14 11:32:55,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:55,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:32:55,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:55,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:32:55,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:32:55,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:32:55,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 185 transitions, 2201 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 11:32:55,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:55,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:32:55,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:57,018 INFO L124 PetriNetUnfolderBase]: 6695/10254 cut-off events. [2024-06-14 11:32:57,018 INFO L125 PetriNetUnfolderBase]: For 201247/201834 co-relation queries the response was YES. [2024-06-14 11:32:57,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63770 conditions, 10254 events. 6695/10254 cut-off events. For 201247/201834 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 66347 event pairs, 1958 based on Foata normal form. 156/10192 useless extension candidates. Maximal degree in co-relation 63694. Up to 6708 conditions per place. [2024-06-14 11:32:57,127 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 153 selfloop transitions, 63 changer transitions 0/231 dead transitions. [2024-06-14 11:32:57,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 231 transitions, 2962 flow [2024-06-14 11:32:57,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:57,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:57,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 196 transitions. [2024-06-14 11:32:57,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2024-06-14 11:32:57,129 INFO L175 Difference]: Start difference. First operand has 149 places, 185 transitions, 2201 flow. Second operand 6 states and 196 transitions. [2024-06-14 11:32:57,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 231 transitions, 2962 flow [2024-06-14 11:32:57,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 231 transitions, 2888 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 11:32:57,792 INFO L231 Difference]: Finished difference. Result has 151 places, 186 transitions, 2291 flow [2024-06-14 11:32:57,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2127, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2291, PETRI_PLACES=151, PETRI_TRANSITIONS=186} [2024-06-14 11:32:57,793 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 98 predicate places. [2024-06-14 11:32:57,793 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 186 transitions, 2291 flow [2024-06-14 11:32:57,793 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 11:32:57,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:57,793 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 11:32:57,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 11:32:57,793 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 11:32:57,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:57,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1227681782, now seen corresponding path program 4 times [2024-06-14 11:32:57,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:57,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329597215] [2024-06-14 11:32:57,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:57,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:57,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:57,956 INFO 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 11:32:57,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:57,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329597215] [2024-06-14 11:32:57,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329597215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:57,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:57,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:32:57,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093991054] [2024-06-14 11:32:57,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:57,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:32:57,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:57,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:32:57,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:32:58,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:32:58,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 186 transitions, 2291 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 11:32:58,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:58,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:32:58,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:59,135 INFO L124 PetriNetUnfolderBase]: 6526/10019 cut-off events. [2024-06-14 11:32:59,135 INFO L125 PetriNetUnfolderBase]: For 201167/201806 co-relation queries the response was YES. [2024-06-14 11:32:59,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61757 conditions, 10019 events. 6526/10019 cut-off events. For 201167/201806 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 64778 event pairs, 2177 based on Foata normal form. 185/9996 useless extension candidates. Maximal degree in co-relation 61680. Up to 8164 conditions per place. [2024-06-14 11:32:59,238 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 150 selfloop transitions, 55 changer transitions 0/220 dead transitions. [2024-06-14 11:32:59,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 220 transitions, 2853 flow [2024-06-14 11:32:59,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:32:59,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:32:59,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-14 11:32:59,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6233333333333333 [2024-06-14 11:32:59,240 INFO L175 Difference]: Start difference. First operand has 151 places, 186 transitions, 2291 flow. Second operand 6 states and 187 transitions. [2024-06-14 11:32:59,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 220 transitions, 2853 flow [2024-06-14 11:32:59,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 220 transitions, 2697 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 11:32:59,935 INFO L231 Difference]: Finished difference. Result has 152 places, 186 transitions, 2257 flow [2024-06-14 11:32:59,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2135, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2257, PETRI_PLACES=152, PETRI_TRANSITIONS=186} [2024-06-14 11:32:59,936 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 99 predicate places. [2024-06-14 11:32:59,936 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 186 transitions, 2257 flow [2024-06-14 11:32:59,936 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 11:32:59,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:59,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:59,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 11:32:59,936 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 11:32:59,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:59,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1344305576, now seen corresponding path program 5 times [2024-06-14 11:32:59,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:59,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606298323] [2024-06-14 11:32:59,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:59,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:00,084 INFO 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 11:33:00,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:00,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606298323] [2024-06-14 11:33:00,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606298323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:00,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:00,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:00,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19063870] [2024-06-14 11:33:00,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:00,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:00,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:00,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:00,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:00,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:33:00,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 186 transitions, 2257 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 11:33:00,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:00,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:33:00,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:01,450 INFO L124 PetriNetUnfolderBase]: 7231/11116 cut-off events. [2024-06-14 11:33:01,451 INFO L125 PetriNetUnfolderBase]: For 220149/220835 co-relation queries the response was YES. [2024-06-14 11:33:01,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68414 conditions, 11116 events. 7231/11116 cut-off events. For 220149/220835 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 73782 event pairs, 2382 based on Foata normal form. 211/11100 useless extension candidates. Maximal degree in co-relation 68337. Up to 8656 conditions per place. [2024-06-14 11:33:01,568 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 155 selfloop transitions, 68 changer transitions 0/238 dead transitions. [2024-06-14 11:33:01,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 238 transitions, 3057 flow [2024-06-14 11:33:01,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:01,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:01,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 221 transitions. [2024-06-14 11:33:01,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6314285714285715 [2024-06-14 11:33:01,569 INFO L175 Difference]: Start difference. First operand has 152 places, 186 transitions, 2257 flow. Second operand 7 states and 221 transitions. [2024-06-14 11:33:01,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 238 transitions, 3057 flow [2024-06-14 11:33:02,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 238 transitions, 2914 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 11:33:02,236 INFO L231 Difference]: Finished difference. Result has 153 places, 188 transitions, 2318 flow [2024-06-14 11:33:02,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2118, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2318, PETRI_PLACES=153, PETRI_TRANSITIONS=188} [2024-06-14 11:33:02,237 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 100 predicate places. [2024-06-14 11:33:02,237 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 188 transitions, 2318 flow [2024-06-14 11:33:02,238 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 11:33:02,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:02,238 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 11:33:02,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 11:33:02,238 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 11:33:02,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:02,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1336687016, now seen corresponding path program 6 times [2024-06-14 11:33:02,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:02,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153455912] [2024-06-14 11:33:02,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:02,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:02,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:02,403 INFO 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 11:33:02,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:02,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153455912] [2024-06-14 11:33:02,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153455912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:02,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:02,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:02,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102575127] [2024-06-14 11:33:02,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:02,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:02,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:02,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:02,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:02,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:33:02,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 188 transitions, 2318 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 11:33:02,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:02,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:33:02,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:03,906 INFO L124 PetriNetUnfolderBase]: 7539/11574 cut-off events. [2024-06-14 11:33:03,906 INFO L125 PetriNetUnfolderBase]: For 229510/230235 co-relation queries the response was YES. [2024-06-14 11:33:03,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71061 conditions, 11574 events. 7539/11574 cut-off events. For 229510/230235 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 77502 event pairs, 2617 based on Foata normal form. 212/11539 useless extension candidates. Maximal degree in co-relation 70984. Up to 9877 conditions per place. [2024-06-14 11:33:04,057 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 147 selfloop transitions, 66 changer transitions 0/228 dead transitions. [2024-06-14 11:33:04,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 228 transitions, 2920 flow [2024-06-14 11:33:04,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:04,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:04,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-14 11:33:04,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6057142857142858 [2024-06-14 11:33:04,059 INFO L175 Difference]: Start difference. First operand has 153 places, 188 transitions, 2318 flow. Second operand 7 states and 212 transitions. [2024-06-14 11:33:04,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 228 transitions, 2920 flow [2024-06-14 11:33:04,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 228 transitions, 2818 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 11:33:04,818 INFO L231 Difference]: Finished difference. Result has 157 places, 189 transitions, 2388 flow [2024-06-14 11:33:04,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2222, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2388, PETRI_PLACES=157, PETRI_TRANSITIONS=189} [2024-06-14 11:33:04,818 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 104 predicate places. [2024-06-14 11:33:04,818 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 189 transitions, 2388 flow [2024-06-14 11:33:04,819 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 11:33:04,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:04,819 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 11:33:04,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 11:33:04,819 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:33:04,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:04,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1078399046, now seen corresponding path program 7 times [2024-06-14 11:33:04,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:04,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419223260] [2024-06-14 11:33:04,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:04,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:04,994 INFO 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 11:33:04,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:04,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419223260] [2024-06-14 11:33:04,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419223260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:04,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:04,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:04,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968422951] [2024-06-14 11:33:04,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:04,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:04,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:04,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:04,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:05,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:33:05,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 189 transitions, 2388 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 11:33:05,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:05,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:33:05,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:06,494 INFO L124 PetriNetUnfolderBase]: 7907/12118 cut-off events. [2024-06-14 11:33:06,494 INFO L125 PetriNetUnfolderBase]: For 241089/241730 co-relation queries the response was YES. [2024-06-14 11:33:06,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74293 conditions, 12118 events. 7907/12118 cut-off events. For 241089/241730 co-relation queries the response was YES. Maximal size of possible extension queue 727. Compared 81643 event pairs, 2714 based on Foata normal form. 167/12048 useless extension candidates. Maximal degree in co-relation 74214. Up to 10411 conditions per place. [2024-06-14 11:33:06,624 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 145 selfloop transitions, 67 changer transitions 0/227 dead transitions. [2024-06-14 11:33:06,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 227 transitions, 2988 flow [2024-06-14 11:33:06,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:06,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:06,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-14 11:33:06,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 11:33:06,625 INFO L175 Difference]: Start difference. First operand has 157 places, 189 transitions, 2388 flow. Second operand 7 states and 210 transitions. [2024-06-14 11:33:06,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 227 transitions, 2988 flow [2024-06-14 11:33:07,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 227 transitions, 2852 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:07,374 INFO L231 Difference]: Finished difference. Result has 159 places, 190 transitions, 2422 flow [2024-06-14 11:33:07,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2252, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2422, PETRI_PLACES=159, PETRI_TRANSITIONS=190} [2024-06-14 11:33:07,375 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 106 predicate places. [2024-06-14 11:33:07,375 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 190 transitions, 2422 flow [2024-06-14 11:33:07,376 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 11:33:07,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:07,376 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 11:33:07,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 11:33:07,376 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 11:33:07,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:07,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1576738392, now seen corresponding path program 8 times [2024-06-14 11:33:07,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:07,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118092000] [2024-06-14 11:33:07,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:07,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:07,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:07,575 INFO 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 11:33:07,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:07,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118092000] [2024-06-14 11:33:07,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118092000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:07,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:07,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:07,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855786084] [2024-06-14 11:33:07,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:07,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:07,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:07,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:07,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:07,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:33:07,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 190 transitions, 2422 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 11:33:07,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:07,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:33:07,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:08,898 INFO L124 PetriNetUnfolderBase]: 7749/11822 cut-off events. [2024-06-14 11:33:08,898 INFO L125 PetriNetUnfolderBase]: For 235496/236254 co-relation queries the response was YES. [2024-06-14 11:33:08,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71563 conditions, 11822 events. 7749/11822 cut-off events. For 235496/236254 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 79064 event pairs, 2586 based on Foata normal form. 140/11700 useless extension candidates. Maximal degree in co-relation 71483. Up to 10061 conditions per place. [2024-06-14 11:33:09,023 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 158 selfloop transitions, 55 changer transitions 0/228 dead transitions. [2024-06-14 11:33:09,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 228 transitions, 2992 flow [2024-06-14 11:33:09,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:09,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:09,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-06-14 11:33:09,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366666666666667 [2024-06-14 11:33:09,024 INFO L175 Difference]: Start difference. First operand has 159 places, 190 transitions, 2422 flow. Second operand 6 states and 191 transitions. [2024-06-14 11:33:09,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 228 transitions, 2992 flow [2024-06-14 11:33:09,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 228 transitions, 2846 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:09,708 INFO L231 Difference]: Finished difference. Result has 160 places, 190 transitions, 2398 flow [2024-06-14 11:33:09,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2276, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2398, PETRI_PLACES=160, PETRI_TRANSITIONS=190} [2024-06-14 11:33:09,709 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 107 predicate places. [2024-06-14 11:33:09,709 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 190 transitions, 2398 flow [2024-06-14 11:33:09,709 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 11:33:09,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:09,709 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 11:33:09,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 11:33:09,709 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 11:33:09,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:09,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1219620960, now seen corresponding path program 1 times [2024-06-14 11:33:09,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:09,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580585989] [2024-06-14 11:33:09,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:09,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:09,869 INFO 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 11:33:09,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:09,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580585989] [2024-06-14 11:33:09,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580585989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:09,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:09,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:09,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837142875] [2024-06-14 11:33:09,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:09,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:09,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:09,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:09,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:09,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:33:09,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 190 transitions, 2398 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 11:33:09,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:09,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:33:09,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:11,344 INFO L124 PetriNetUnfolderBase]: 8261/12724 cut-off events. [2024-06-14 11:33:11,344 INFO L125 PetriNetUnfolderBase]: For 254920/255570 co-relation queries the response was YES. [2024-06-14 11:33:11,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77056 conditions, 12724 events. 8261/12724 cut-off events. For 254920/255570 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 86696 event pairs, 2393 based on Foata normal form. 132/12593 useless extension candidates. Maximal degree in co-relation 76975. Up to 6218 conditions per place. [2024-06-14 11:33:11,486 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 151 selfloop transitions, 82 changer transitions 0/248 dead transitions. [2024-06-14 11:33:11,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 248 transitions, 3284 flow [2024-06-14 11:33:11,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:11,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:11,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 225 transitions. [2024-06-14 11:33:11,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-14 11:33:11,488 INFO L175 Difference]: Start difference. First operand has 160 places, 190 transitions, 2398 flow. Second operand 7 states and 225 transitions. [2024-06-14 11:33:11,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 248 transitions, 3284 flow [2024-06-14 11:33:12,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 248 transitions, 3162 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:12,198 INFO L231 Difference]: Finished difference. Result has 162 places, 192 transitions, 2508 flow [2024-06-14 11:33:12,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2276, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2508, PETRI_PLACES=162, PETRI_TRANSITIONS=192} [2024-06-14 11:33:12,198 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 109 predicate places. [2024-06-14 11:33:12,198 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 192 transitions, 2508 flow [2024-06-14 11:33:12,199 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 11:33:12,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:12,199 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 11:33:12,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 11:33:12,199 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 11:33:12,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:12,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1219352190, now seen corresponding path program 2 times [2024-06-14 11:33:12,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:12,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448858938] [2024-06-14 11:33:12,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:12,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:12,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:12,341 INFO 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 11:33:12,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:12,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448858938] [2024-06-14 11:33:12,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448858938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:12,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:12,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:12,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765827676] [2024-06-14 11:33:12,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:12,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:12,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:12,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:12,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:12,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:33:12,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 192 transitions, 2508 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 11:33:12,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:12,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:33:12,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:13,858 INFO L124 PetriNetUnfolderBase]: 8430/12991 cut-off events. [2024-06-14 11:33:13,858 INFO L125 PetriNetUnfolderBase]: For 274738/275502 co-relation queries the response was YES. [2024-06-14 11:33:13,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79639 conditions, 12991 events. 8430/12991 cut-off events. For 274738/275502 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 89076 event pairs, 2371 based on Foata normal form. 153/12863 useless extension candidates. Maximal degree in co-relation 79557. Up to 6240 conditions per place. [2024-06-14 11:33:14,057 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 149 selfloop transitions, 83 changer transitions 0/247 dead transitions. [2024-06-14 11:33:14,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 247 transitions, 3372 flow [2024-06-14 11:33:14,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:14,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:14,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2024-06-14 11:33:14,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6371428571428571 [2024-06-14 11:33:14,059 INFO L175 Difference]: Start difference. First operand has 162 places, 192 transitions, 2508 flow. Second operand 7 states and 223 transitions. [2024-06-14 11:33:14,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 247 transitions, 3372 flow [2024-06-14 11:33:15,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 247 transitions, 3180 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 11:33:15,068 INFO L231 Difference]: Finished difference. Result has 165 places, 193 transitions, 2520 flow [2024-06-14 11:33:15,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2324, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2520, PETRI_PLACES=165, PETRI_TRANSITIONS=193} [2024-06-14 11:33:15,069 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 112 predicate places. [2024-06-14 11:33:15,069 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 193 transitions, 2520 flow [2024-06-14 11:33:15,069 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 11:33:15,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:15,069 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 11:33:15,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 11:33:15,069 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 11:33:15,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:15,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1130786430, now seen corresponding path program 3 times [2024-06-14 11:33:15,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:15,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872190326] [2024-06-14 11:33:15,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:15,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:15,211 INFO 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 11:33:15,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:15,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872190326] [2024-06-14 11:33:15,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872190326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:15,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:15,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:15,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597811140] [2024-06-14 11:33:15,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:15,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:15,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:15,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:15,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:15,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:33:15,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 193 transitions, 2520 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 11:33:15,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:15,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:33:15,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:16,752 INFO L124 PetriNetUnfolderBase]: 8677/13456 cut-off events. [2024-06-14 11:33:16,752 INFO L125 PetriNetUnfolderBase]: For 290216/291008 co-relation queries the response was YES. [2024-06-14 11:33:16,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82038 conditions, 13456 events. 8677/13456 cut-off events. For 290216/291008 co-relation queries the response was YES. Maximal size of possible extension queue 841. Compared 93924 event pairs, 3017 based on Foata normal form. 169/13302 useless extension candidates. Maximal degree in co-relation 81955. Up to 10014 conditions per place. [2024-06-14 11:33:16,943 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 152 selfloop transitions, 71 changer transitions 0/238 dead transitions. [2024-06-14 11:33:16,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 238 transitions, 3206 flow [2024-06-14 11:33:16,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:16,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:16,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 215 transitions. [2024-06-14 11:33:16,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-14 11:33:16,945 INFO L175 Difference]: Start difference. First operand has 165 places, 193 transitions, 2520 flow. Second operand 7 states and 215 transitions. [2024-06-14 11:33:16,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 238 transitions, 3206 flow [2024-06-14 11:33:17,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 238 transitions, 3074 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-14 11:33:17,891 INFO L231 Difference]: Finished difference. Result has 168 places, 194 transitions, 2564 flow [2024-06-14 11:33:17,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2389, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2564, PETRI_PLACES=168, PETRI_TRANSITIONS=194} [2024-06-14 11:33:17,891 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 115 predicate places. [2024-06-14 11:33:17,891 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 194 transitions, 2564 flow [2024-06-14 11:33:17,892 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 11:33:17,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:17,892 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 11:33:17,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 11:33:17,892 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 11:33:17,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:17,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1576922842, now seen corresponding path program 4 times [2024-06-14 11:33:17,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:17,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64120543] [2024-06-14 11:33:17,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:17,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:18,039 INFO 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 11:33:18,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:18,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64120543] [2024-06-14 11:33:18,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64120543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:18,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:18,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:18,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066358515] [2024-06-14 11:33:18,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:18,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:18,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:18,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:18,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:18,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:33:18,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 194 transitions, 2564 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 11:33:18,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:18,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:33:18,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:19,594 INFO L124 PetriNetUnfolderBase]: 8579/13216 cut-off events. [2024-06-14 11:33:19,594 INFO L125 PetriNetUnfolderBase]: For 283287/284029 co-relation queries the response was YES. [2024-06-14 11:33:19,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79386 conditions, 13216 events. 8579/13216 cut-off events. For 283287/284029 co-relation queries the response was YES. Maximal size of possible extension queue 824. Compared 90987 event pairs, 2437 based on Foata normal form. 114/12991 useless extension candidates. Maximal degree in co-relation 79302. Up to 9801 conditions per place. [2024-06-14 11:33:19,749 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 160 selfloop transitions, 64 changer transitions 0/239 dead transitions. [2024-06-14 11:33:19,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 239 transitions, 3220 flow [2024-06-14 11:33:19,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:19,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:19,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 196 transitions. [2024-06-14 11:33:19,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2024-06-14 11:33:19,750 INFO L175 Difference]: Start difference. First operand has 168 places, 194 transitions, 2564 flow. Second operand 6 states and 196 transitions. [2024-06-14 11:33:19,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 239 transitions, 3220 flow [2024-06-14 11:33:20,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 239 transitions, 3066 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:20,692 INFO L231 Difference]: Finished difference. Result has 169 places, 194 transitions, 2547 flow [2024-06-14 11:33:20,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2410, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2547, PETRI_PLACES=169, PETRI_TRANSITIONS=194} [2024-06-14 11:33:20,693 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 116 predicate places. [2024-06-14 11:33:20,693 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 194 transitions, 2547 flow [2024-06-14 11:33:20,693 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 11:33:20,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:20,693 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 11:33:20,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 11:33:20,694 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:33:20,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:20,694 INFO L85 PathProgramCache]: Analyzing trace with hash -924326040, now seen corresponding path program 1 times [2024-06-14 11:33:20,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:20,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601351835] [2024-06-14 11:33:20,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:20,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:20,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:20,822 INFO 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 11:33:20,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:20,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601351835] [2024-06-14 11:33:20,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601351835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:20,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:20,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:20,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361506739] [2024-06-14 11:33:20,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:20,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:20,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:20,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:20,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:20,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:33:20,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 194 transitions, 2547 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:20,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:20,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:33:20,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:22,393 INFO L124 PetriNetUnfolderBase]: 9585/14508 cut-off events. [2024-06-14 11:33:22,393 INFO L125 PetriNetUnfolderBase]: For 257538/257545 co-relation queries the response was YES. [2024-06-14 11:33:22,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84249 conditions, 14508 events. 9585/14508 cut-off events. For 257538/257545 co-relation queries the response was YES. Maximal size of possible extension queue 812. Compared 97359 event pairs, 3637 based on Foata normal form. 7/14512 useless extension candidates. Maximal degree in co-relation 84164. Up to 13575 conditions per place. [2024-06-14 11:33:22,578 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 180 selfloop transitions, 39 changer transitions 0/227 dead transitions. [2024-06-14 11:33:22,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 227 transitions, 3263 flow [2024-06-14 11:33:22,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:22,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:22,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-14 11:33:22,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-06-14 11:33:22,580 INFO L175 Difference]: Start difference. First operand has 169 places, 194 transitions, 2547 flow. Second operand 7 states and 189 transitions. [2024-06-14 11:33:22,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 227 transitions, 3263 flow [2024-06-14 11:33:23,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 227 transitions, 3087 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 11:33:23,471 INFO L231 Difference]: Finished difference. Result has 171 places, 206 transitions, 2645 flow [2024-06-14 11:33:23,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2371, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2645, PETRI_PLACES=171, PETRI_TRANSITIONS=206} [2024-06-14 11:33:23,472 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 118 predicate places. [2024-06-14 11:33:23,472 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 206 transitions, 2645 flow [2024-06-14 11:33:23,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:23,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:23,472 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 11:33:23,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 11:33:23,472 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:33:23,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:23,473 INFO L85 PathProgramCache]: Analyzing trace with hash 526842240, now seen corresponding path program 2 times [2024-06-14 11:33:23,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:23,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530961856] [2024-06-14 11:33:23,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:23,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:23,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:23,601 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 11:33:23,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:23,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530961856] [2024-06-14 11:33:23,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530961856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:23,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:23,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:23,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558967689] [2024-06-14 11:33:23,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:23,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:23,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:23,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:23,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:23,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:33:23,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 206 transitions, 2645 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:23,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:23,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:33:23,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:25,214 INFO L124 PetriNetUnfolderBase]: 9581/14473 cut-off events. [2024-06-14 11:33:25,214 INFO L125 PetriNetUnfolderBase]: For 265533/265550 co-relation queries the response was YES. [2024-06-14 11:33:25,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85007 conditions, 14473 events. 9581/14473 cut-off events. For 265533/265550 co-relation queries the response was YES. Maximal size of possible extension queue 810. Compared 97069 event pairs, 3556 based on Foata normal form. 17/14485 useless extension candidates. Maximal degree in co-relation 84920. Up to 13571 conditions per place. [2024-06-14 11:33:25,410 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 173 selfloop transitions, 37 changer transitions 0/218 dead transitions. [2024-06-14 11:33:25,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 218 transitions, 3095 flow [2024-06-14 11:33:25,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:33:25,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:33:25,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-14 11:33:25,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-06-14 11:33:25,411 INFO L175 Difference]: Start difference. First operand has 171 places, 206 transitions, 2645 flow. Second operand 5 states and 140 transitions. [2024-06-14 11:33:25,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 218 transitions, 3095 flow [2024-06-14 11:33:26,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 218 transitions, 2961 flow, removed 56 selfloop flow, removed 3 redundant places. [2024-06-14 11:33:26,206 INFO L231 Difference]: Finished difference. Result has 173 places, 206 transitions, 2597 flow [2024-06-14 11:33:26,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2511, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2597, PETRI_PLACES=173, PETRI_TRANSITIONS=206} [2024-06-14 11:33:26,207 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 120 predicate places. [2024-06-14 11:33:26,207 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 206 transitions, 2597 flow [2024-06-14 11:33:26,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:26,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:26,207 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 11:33:26,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 11:33:26,207 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:33:26,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:26,208 INFO L85 PathProgramCache]: Analyzing trace with hash 526855136, now seen corresponding path program 1 times [2024-06-14 11:33:26,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:26,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480795257] [2024-06-14 11:33:26,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:26,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:26,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:26,341 INFO 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 11:33:26,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:26,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480795257] [2024-06-14 11:33:26,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480795257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:26,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:26,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:26,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010550534] [2024-06-14 11:33:26,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:26,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:26,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:26,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:26,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:26,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 11:33:26,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 206 transitions, 2597 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 11:33:26,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:26,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 11:33:26,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:28,033 INFO L124 PetriNetUnfolderBase]: 9249/13962 cut-off events. [2024-06-14 11:33:28,034 INFO L125 PetriNetUnfolderBase]: For 311549/311714 co-relation queries the response was YES. [2024-06-14 11:33:28,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83508 conditions, 13962 events. 9249/13962 cut-off events. For 311549/311714 co-relation queries the response was YES. Maximal size of possible extension queue 837. Compared 94626 event pairs, 3350 based on Foata normal form. 94/13588 useless extension candidates. Maximal degree in co-relation 83420. Up to 12410 conditions per place. [2024-06-14 11:33:28,192 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 132 selfloop transitions, 52 changer transitions 0/227 dead transitions. [2024-06-14 11:33:28,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 227 transitions, 3081 flow [2024-06-14 11:33:28,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:33:28,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:33:28,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-06-14 11:33:28,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608 [2024-06-14 11:33:28,193 INFO L175 Difference]: Start difference. First operand has 173 places, 206 transitions, 2597 flow. Second operand 5 states and 152 transitions. [2024-06-14 11:33:28,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 227 transitions, 3081 flow [2024-06-14 11:33:28,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 227 transitions, 3000 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:28,893 INFO L231 Difference]: Finished difference. Result has 173 places, 209 transitions, 2680 flow [2024-06-14 11:33:28,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2516, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2680, PETRI_PLACES=173, PETRI_TRANSITIONS=209} [2024-06-14 11:33:28,895 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 120 predicate places. [2024-06-14 11:33:28,895 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 209 transitions, 2680 flow [2024-06-14 11:33:28,895 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 11:33:28,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:28,895 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 11:33:28,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 11:33:28,895 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:33:28,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:28,896 INFO L85 PathProgramCache]: Analyzing trace with hash 643523272, now seen corresponding path program 3 times [2024-06-14 11:33:28,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:28,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684312146] [2024-06-14 11:33:28,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:28,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:28,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:29,024 INFO 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 11:33:29,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:29,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684312146] [2024-06-14 11:33:29,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684312146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:29,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:29,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:29,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004164963] [2024-06-14 11:33:29,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:29,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:29,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:29,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:29,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:29,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:33:29,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 209 transitions, 2680 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:29,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:29,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:33:29,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:30,654 INFO L124 PetriNetUnfolderBase]: 9916/14958 cut-off events. [2024-06-14 11:33:30,654 INFO L125 PetriNetUnfolderBase]: For 276868/276875 co-relation queries the response was YES. [2024-06-14 11:33:30,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89504 conditions, 14958 events. 9916/14958 cut-off events. For 276868/276875 co-relation queries the response was YES. Maximal size of possible extension queue 847. Compared 100572 event pairs, 3706 based on Foata normal form. 7/14960 useless extension candidates. Maximal degree in co-relation 89416. Up to 14020 conditions per place. [2024-06-14 11:33:30,864 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 186 selfloop transitions, 47 changer transitions 0/241 dead transitions. [2024-06-14 11:33:30,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 241 transitions, 3436 flow [2024-06-14 11:33:30,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:30,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:30,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-14 11:33:30,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-06-14 11:33:30,866 INFO L175 Difference]: Start difference. First operand has 173 places, 209 transitions, 2680 flow. Second operand 6 states and 168 transitions. [2024-06-14 11:33:30,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 241 transitions, 3436 flow [2024-06-14 11:33:31,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 241 transitions, 3328 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-14 11:33:31,759 INFO L231 Difference]: Finished difference. Result has 177 places, 221 transitions, 2878 flow [2024-06-14 11:33:31,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2574, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2878, PETRI_PLACES=177, PETRI_TRANSITIONS=221} [2024-06-14 11:33:31,760 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 124 predicate places. [2024-06-14 11:33:31,760 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 221 transitions, 2878 flow [2024-06-14 11:33:31,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:31,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:31,760 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 11:33:31,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 11:33:31,760 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:33:31,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:31,761 INFO L85 PathProgramCache]: Analyzing trace with hash -403433654, now seen corresponding path program 4 times [2024-06-14 11:33:31,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:31,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097513634] [2024-06-14 11:33:31,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:31,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:31,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:31,892 INFO 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 11:33:31,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:31,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097513634] [2024-06-14 11:33:31,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097513634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:31,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:31,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:31,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001305519] [2024-06-14 11:33:31,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:31,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:31,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:31,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:31,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:31,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:33:31,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 221 transitions, 2878 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:31,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:31,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:33:31,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:33,717 INFO L124 PetriNetUnfolderBase]: 9923/14961 cut-off events. [2024-06-14 11:33:33,718 INFO L125 PetriNetUnfolderBase]: For 280054/280071 co-relation queries the response was YES. [2024-06-14 11:33:33,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89532 conditions, 14961 events. 9923/14961 cut-off events. For 280054/280071 co-relation queries the response was YES. Maximal size of possible extension queue 847. Compared 100471 event pairs, 3622 based on Foata normal form. 17/14973 useless extension candidates. Maximal degree in co-relation 89442. Up to 14028 conditions per place. [2024-06-14 11:33:33,875 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 180 selfloop transitions, 51 changer transitions 0/239 dead transitions. [2024-06-14 11:33:33,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 239 transitions, 3512 flow [2024-06-14 11:33:33,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:33,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:33,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-14 11:33:33,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-06-14 11:33:33,877 INFO L175 Difference]: Start difference. First operand has 177 places, 221 transitions, 2878 flow. Second operand 6 states and 162 transitions. [2024-06-14 11:33:33,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 239 transitions, 3512 flow [2024-06-14 11:33:34,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 239 transitions, 3418 flow, removed 42 selfloop flow, removed 1 redundant places. [2024-06-14 11:33:34,765 INFO L231 Difference]: Finished difference. Result has 182 places, 225 transitions, 2965 flow [2024-06-14 11:33:34,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2786, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2965, PETRI_PLACES=182, PETRI_TRANSITIONS=225} [2024-06-14 11:33:34,766 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 129 predicate places. [2024-06-14 11:33:34,766 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 225 transitions, 2965 flow [2024-06-14 11:33:34,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:34,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:34,767 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 11:33:34,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 11:33:34,767 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:33:34,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:34,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1652961484, now seen corresponding path program 5 times [2024-06-14 11:33:34,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:34,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340131558] [2024-06-14 11:33:34,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:34,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:34,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:34,898 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 11:33:34,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:34,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340131558] [2024-06-14 11:33:34,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340131558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:34,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:34,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:34,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329265979] [2024-06-14 11:33:34,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:34,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:34,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:34,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:34,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:34,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:33:34,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 225 transitions, 2965 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:34,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:34,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:33:34,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:36,573 INFO L124 PetriNetUnfolderBase]: 9919/14952 cut-off events. [2024-06-14 11:33:36,574 INFO L125 PetriNetUnfolderBase]: For 280494/280511 co-relation queries the response was YES. [2024-06-14 11:33:36,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88246 conditions, 14952 events. 9919/14952 cut-off events. For 280494/280511 co-relation queries the response was YES. Maximal size of possible extension queue 847. Compared 100292 event pairs, 3618 based on Foata normal form. 17/14964 useless extension candidates. Maximal degree in co-relation 88153. Up to 14024 conditions per place. [2024-06-14 11:33:36,746 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 179 selfloop transitions, 51 changer transitions 0/238 dead transitions. [2024-06-14 11:33:36,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 238 transitions, 3457 flow [2024-06-14 11:33:36,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:36,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:36,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-14 11:33:36,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5366666666666666 [2024-06-14 11:33:36,747 INFO L175 Difference]: Start difference. First operand has 182 places, 225 transitions, 2965 flow. Second operand 6 states and 161 transitions. [2024-06-14 11:33:36,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 238 transitions, 3457 flow [2024-06-14 11:33:37,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 238 transitions, 3270 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-14 11:33:37,858 INFO L231 Difference]: Finished difference. Result has 185 places, 225 transitions, 2887 flow [2024-06-14 11:33:37,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2778, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2887, PETRI_PLACES=185, PETRI_TRANSITIONS=225} [2024-06-14 11:33:37,859 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 132 predicate places. [2024-06-14 11:33:37,860 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 225 transitions, 2887 flow [2024-06-14 11:33:37,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:37,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:37,860 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 11:33:37,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 11:33:37,860 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:33:37,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:37,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1315155488, now seen corresponding path program 2 times [2024-06-14 11:33:37,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:37,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106754499] [2024-06-14 11:33:37,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:37,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:38,035 INFO 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 11:33:38,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:38,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106754499] [2024-06-14 11:33:38,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106754499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:38,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:38,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:38,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188618195] [2024-06-14 11:33:38,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:38,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:38,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:38,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:38,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:38,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 11:33:38,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 225 transitions, 2887 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 11:33:38,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:38,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 11:33:38,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:39,826 INFO L124 PetriNetUnfolderBase]: 9358/14129 cut-off events. [2024-06-14 11:33:39,827 INFO L125 PetriNetUnfolderBase]: For 312258/312415 co-relation queries the response was YES. [2024-06-14 11:33:39,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85096 conditions, 14129 events. 9358/14129 cut-off events. For 312258/312415 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 95689 event pairs, 3358 based on Foata normal form. 50/13706 useless extension candidates. Maximal degree in co-relation 85002. Up to 12793 conditions per place. [2024-06-14 11:33:39,953 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 155 selfloop transitions, 38 changer transitions 0/244 dead transitions. [2024-06-14 11:33:39,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 244 transitions, 3361 flow [2024-06-14 11:33:39,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:39,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:39,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-06-14 11:33:39,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-14 11:33:39,954 INFO L175 Difference]: Start difference. First operand has 185 places, 225 transitions, 2887 flow. Second operand 6 states and 170 transitions. [2024-06-14 11:33:39,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 244 transitions, 3361 flow [2024-06-14 11:33:40,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 244 transitions, 3213 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:40,789 INFO L231 Difference]: Finished difference. Result has 186 places, 227 transitions, 2850 flow [2024-06-14 11:33:40,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2739, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2850, PETRI_PLACES=186, PETRI_TRANSITIONS=227} [2024-06-14 11:33:40,790 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 133 predicate places. [2024-06-14 11:33:40,790 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 227 transitions, 2850 flow [2024-06-14 11:33:40,791 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 11:33:40,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:40,791 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 11:33:40,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 11:33:40,791 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:33:40,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:40,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1333249568, now seen corresponding path program 3 times [2024-06-14 11:33:40,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:40,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053450149] [2024-06-14 11:33:40,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:40,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:40,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:40,916 INFO 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 11:33:40,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:40,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053450149] [2024-06-14 11:33:40,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053450149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:40,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:40,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:40,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751883888] [2024-06-14 11:33:40,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:40,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:40,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:40,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:40,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:40,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 11:33:40,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 227 transitions, 2850 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 11:33:40,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:40,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 11:33:40,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:42,582 INFO L124 PetriNetUnfolderBase]: 9373/14128 cut-off events. [2024-06-14 11:33:42,582 INFO L125 PetriNetUnfolderBase]: For 319462/319579 co-relation queries the response was YES. [2024-06-14 11:33:42,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86265 conditions, 14128 events. 9373/14128 cut-off events. For 319462/319579 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 95574 event pairs, 3340 based on Foata normal form. 44/13710 useless extension candidates. Maximal degree in co-relation 86171. Up to 12680 conditions per place. [2024-06-14 11:33:42,733 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 156 selfloop transitions, 43 changer transitions 0/250 dead transitions. [2024-06-14 11:33:42,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 250 transitions, 3374 flow [2024-06-14 11:33:42,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:42,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:42,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-14 11:33:42,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2024-06-14 11:33:42,735 INFO L175 Difference]: Start difference. First operand has 186 places, 227 transitions, 2850 flow. Second operand 6 states and 172 transitions. [2024-06-14 11:33:42,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 250 transitions, 3374 flow [2024-06-14 11:33:43,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 250 transitions, 3293 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 11:33:43,787 INFO L231 Difference]: Finished difference. Result has 189 places, 230 transitions, 2923 flow [2024-06-14 11:33:43,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2769, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2923, PETRI_PLACES=189, PETRI_TRANSITIONS=230} [2024-06-14 11:33:43,787 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 136 predicate places. [2024-06-14 11:33:43,787 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 230 transitions, 2923 flow [2024-06-14 11:33:43,787 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 11:33:43,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:43,788 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 11:33:43,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 11:33:43,788 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:33:43,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:43,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1691019608, now seen corresponding path program 1 times [2024-06-14 11:33:43,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:43,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205974131] [2024-06-14 11:33:43,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:43,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:43,917 INFO 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 11:33:43,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:43,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205974131] [2024-06-14 11:33:43,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205974131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:43,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:43,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:43,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460306463] [2024-06-14 11:33:43,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:43,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:43,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:43,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:43,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:43,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:33:43,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 230 transitions, 2923 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:43,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:43,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:33:43,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:45,642 INFO L124 PetriNetUnfolderBase]: 10126/15261 cut-off events. [2024-06-14 11:33:45,643 INFO L125 PetriNetUnfolderBase]: For 325527/325527 co-relation queries the response was YES. [2024-06-14 11:33:45,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92956 conditions, 15261 events. 10126/15261 cut-off events. For 325527/325527 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 102598 event pairs, 3580 based on Foata normal form. 6/15264 useless extension candidates. Maximal degree in co-relation 92860. Up to 14266 conditions per place. [2024-06-14 11:33:45,844 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 236 selfloop transitions, 25 changer transitions 0/269 dead transitions. [2024-06-14 11:33:45,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 269 transitions, 3730 flow [2024-06-14 11:33:45,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:45,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:45,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-14 11:33:45,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 11:33:45,848 INFO L175 Difference]: Start difference. First operand has 189 places, 230 transitions, 2923 flow. Second operand 6 states and 175 transitions. [2024-06-14 11:33:45,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 269 transitions, 3730 flow [2024-06-14 11:33:47,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 269 transitions, 3646 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 11:33:47,087 INFO L231 Difference]: Finished difference. Result has 193 places, 236 transitions, 3008 flow [2024-06-14 11:33:47,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2839, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3008, PETRI_PLACES=193, PETRI_TRANSITIONS=236} [2024-06-14 11:33:47,087 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 140 predicate places. [2024-06-14 11:33:47,087 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 236 transitions, 3008 flow [2024-06-14 11:33:47,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:47,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:47,088 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 11:33:47,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 11:33:47,088 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:33:47,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:47,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1682448728, now seen corresponding path program 2 times [2024-06-14 11:33:47,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:47,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148361998] [2024-06-14 11:33:47,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:47,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:47,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:47,212 INFO 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 11:33:47,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:47,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148361998] [2024-06-14 11:33:47,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148361998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:47,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:47,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:47,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057086767] [2024-06-14 11:33:47,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:47,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:47,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:47,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:47,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:47,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:33:47,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 236 transitions, 3008 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:47,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:47,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:33:47,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:49,096 INFO L124 PetriNetUnfolderBase]: 10170/15329 cut-off events. [2024-06-14 11:33:49,096 INFO L125 PetriNetUnfolderBase]: For 342118/342118 co-relation queries the response was YES. [2024-06-14 11:33:49,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94083 conditions, 15329 events. 10170/15329 cut-off events. For 342118/342118 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 103158 event pairs, 3646 based on Foata normal form. 8/15334 useless extension candidates. Maximal degree in co-relation 93985. Up to 14402 conditions per place. [2024-06-14 11:33:49,269 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 231 selfloop transitions, 22 changer transitions 0/261 dead transitions. [2024-06-14 11:33:49,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 261 transitions, 3632 flow [2024-06-14 11:33:49,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:49,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:49,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-14 11:33:49,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5533333333333333 [2024-06-14 11:33:49,275 INFO L175 Difference]: Start difference. First operand has 193 places, 236 transitions, 3008 flow. Second operand 6 states and 166 transitions. [2024-06-14 11:33:49,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 261 transitions, 3632 flow [2024-06-14 11:33:50,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 261 transitions, 3575 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-14 11:33:50,605 INFO L231 Difference]: Finished difference. Result has 197 places, 238 transitions, 3043 flow [2024-06-14 11:33:50,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2959, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3043, PETRI_PLACES=197, PETRI_TRANSITIONS=238} [2024-06-14 11:33:50,605 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 144 predicate places. [2024-06-14 11:33:50,605 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 238 transitions, 3043 flow [2024-06-14 11:33:50,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:50,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:50,606 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 11:33:50,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 11:33:50,606 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:33:50,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:50,606 INFO L85 PathProgramCache]: Analyzing trace with hash 637820264, now seen corresponding path program 1 times [2024-06-14 11:33:50,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:50,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038670912] [2024-06-14 11:33:50,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:50,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:50,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:50,719 INFO 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 11:33:50,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:50,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038670912] [2024-06-14 11:33:50,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038670912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:50,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:50,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:50,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635291903] [2024-06-14 11:33:50,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:50,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:50,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:50,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:50,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:50,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:33:50,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 238 transitions, 3043 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:50,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:50,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:33:50,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:52,506 INFO L124 PetriNetUnfolderBase]: 10188/15344 cut-off events. [2024-06-14 11:33:52,506 INFO L125 PetriNetUnfolderBase]: For 348682/348686 co-relation queries the response was YES. [2024-06-14 11:33:52,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94462 conditions, 15344 events. 10188/15344 cut-off events. For 348682/348686 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 103249 event pairs, 3626 based on Foata normal form. 5/15345 useless extension candidates. Maximal degree in co-relation 94362. Up to 14410 conditions per place. [2024-06-14 11:33:52,699 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 231 selfloop transitions, 39 changer transitions 0/278 dead transitions. [2024-06-14 11:33:52,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 278 transitions, 4019 flow [2024-06-14 11:33:52,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:52,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:52,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-14 11:33:52,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2024-06-14 11:33:52,701 INFO L175 Difference]: Start difference. First operand has 197 places, 238 transitions, 3043 flow. Second operand 6 states and 172 transitions. [2024-06-14 11:33:52,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 278 transitions, 4019 flow [2024-06-14 11:33:54,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 278 transitions, 3969 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 11:33:54,098 INFO L231 Difference]: Finished difference. Result has 201 places, 253 transitions, 3328 flow [2024-06-14 11:33:54,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2993, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3328, PETRI_PLACES=201, PETRI_TRANSITIONS=253} [2024-06-14 11:33:54,099 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 148 predicate places. [2024-06-14 11:33:54,099 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 253 transitions, 3328 flow [2024-06-14 11:33:54,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:54,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:54,099 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 11:33:54,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 11:33:54,099 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:33:54,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:54,100 INFO L85 PathProgramCache]: Analyzing trace with hash 643534184, now seen corresponding path program 2 times [2024-06-14 11:33:54,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:54,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610221740] [2024-06-14 11:33:54,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:54,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:54,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:54,211 INFO 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 11:33:54,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:54,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610221740] [2024-06-14 11:33:54,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610221740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:54,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:54,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:54,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215648584] [2024-06-14 11:33:54,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:54,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:54,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:54,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:54,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:54,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:33:54,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 253 transitions, 3328 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:54,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:54,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:33:54,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:56,124 INFO L124 PetriNetUnfolderBase]: 10206/15369 cut-off events. [2024-06-14 11:33:56,125 INFO L125 PetriNetUnfolderBase]: For 374067/374071 co-relation queries the response was YES. [2024-06-14 11:33:56,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97430 conditions, 15369 events. 10206/15369 cut-off events. For 374067/374071 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 103358 event pairs, 3626 based on Foata normal form. 5/15370 useless extension candidates. Maximal degree in co-relation 97327. Up to 14430 conditions per place. [2024-06-14 11:33:56,299 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 228 selfloop transitions, 47 changer transitions 0/283 dead transitions. [2024-06-14 11:33:56,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 283 transitions, 4239 flow [2024-06-14 11:33:56,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:56,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:56,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-14 11:33:56,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5633333333333334 [2024-06-14 11:33:56,315 INFO L175 Difference]: Start difference. First operand has 201 places, 253 transitions, 3328 flow. Second operand 6 states and 169 transitions. [2024-06-14 11:33:56,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 283 transitions, 4239 flow [2024-06-14 11:33:57,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 283 transitions, 4122 flow, removed 52 selfloop flow, removed 1 redundant places. [2024-06-14 11:33:57,820 INFO L231 Difference]: Finished difference. Result has 207 places, 262 transitions, 3485 flow [2024-06-14 11:33:57,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3239, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3485, PETRI_PLACES=207, PETRI_TRANSITIONS=262} [2024-06-14 11:33:57,822 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 154 predicate places. [2024-06-14 11:33:57,822 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 262 transitions, 3485 flow [2024-06-14 11:33:57,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:57,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:57,822 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 11:33:57,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 11:33:57,822 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:33:57,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:57,823 INFO L85 PathProgramCache]: Analyzing trace with hash -403425718, now seen corresponding path program 3 times [2024-06-14 11:33:57,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:57,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211196328] [2024-06-14 11:33:57,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:57,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:58,007 INFO 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 11:33:58,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:58,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211196328] [2024-06-14 11:33:58,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211196328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:58,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:58,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:58,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160491222] [2024-06-14 11:33:58,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:58,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:58,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:58,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:58,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:58,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:33:58,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 262 transitions, 3485 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:58,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:58,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:33:58,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:59,855 INFO L124 PetriNetUnfolderBase]: 10180/15321 cut-off events. [2024-06-14 11:33:59,855 INFO L125 PetriNetUnfolderBase]: For 385285/385285 co-relation queries the response was YES. [2024-06-14 11:34:00,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97262 conditions, 15321 events. 10180/15321 cut-off events. For 385285/385285 co-relation queries the response was YES. Maximal size of possible extension queue 863. Compared 102886 event pairs, 3614 based on Foata normal form. 8/15326 useless extension candidates. Maximal degree in co-relation 97156. Up to 14414 conditions per place. [2024-06-14 11:34:00,079 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 250 selfloop transitions, 22 changer transitions 0/280 dead transitions. [2024-06-14 11:34:00,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 280 transitions, 4110 flow [2024-06-14 11:34:00,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:34:00,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:34:00,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-14 11:34:00,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-14 11:34:00,081 INFO L175 Difference]: Start difference. First operand has 207 places, 262 transitions, 3485 flow. Second operand 6 states and 160 transitions. [2024-06-14 11:34:00,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 280 transitions, 4110 flow [2024-06-14 11:34:01,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 280 transitions, 4020 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-14 11:34:01,735 INFO L231 Difference]: Finished difference. Result has 211 places, 263 transitions, 3460 flow [2024-06-14 11:34:01,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3397, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3460, PETRI_PLACES=211, PETRI_TRANSITIONS=263} [2024-06-14 11:34:01,735 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 158 predicate places. [2024-06-14 11:34:01,735 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 263 transitions, 3460 flow [2024-06-14 11:34:01,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:01,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:01,736 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 11:34:01,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 11:34:01,736 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:34:01,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:01,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1370735312, now seen corresponding path program 3 times [2024-06-14 11:34:01,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:01,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710136900] [2024-06-14 11:34:01,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:01,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:01,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:01,869 INFO 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 11:34:01,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:01,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710136900] [2024-06-14 11:34:01,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710136900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:01,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:01,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:34:01,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453784126] [2024-06-14 11:34:01,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:01,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:34:01,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:01,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:34:01,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:34:01,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:34:01,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 263 transitions, 3460 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:01,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:01,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:34:01,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:03,794 INFO L124 PetriNetUnfolderBase]: 10176/15320 cut-off events. [2024-06-14 11:34:03,794 INFO L125 PetriNetUnfolderBase]: For 390331/390335 co-relation queries the response was YES. [2024-06-14 11:34:03,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97394 conditions, 15320 events. 10176/15320 cut-off events. For 390331/390335 co-relation queries the response was YES. Maximal size of possible extension queue 863. Compared 102931 event pairs, 3613 based on Foata normal form. 5/15321 useless extension candidates. Maximal degree in co-relation 97287. Up to 14411 conditions per place. [2024-06-14 11:34:03,979 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 239 selfloop transitions, 35 changer transitions 0/282 dead transitions. [2024-06-14 11:34:03,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 282 transitions, 4140 flow [2024-06-14 11:34:03,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:34:03,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:34:03,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-14 11:34:03,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.588 [2024-06-14 11:34:03,981 INFO L175 Difference]: Start difference. First operand has 211 places, 263 transitions, 3460 flow. Second operand 5 states and 147 transitions. [2024-06-14 11:34:03,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 282 transitions, 4140 flow [2024-06-14 11:34:05,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 282 transitions, 4066 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 11:34:05,992 INFO L231 Difference]: Finished difference. Result has 212 places, 263 transitions, 3468 flow [2024-06-14 11:34:05,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3386, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3468, PETRI_PLACES=212, PETRI_TRANSITIONS=263} [2024-06-14 11:34:05,993 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 159 predicate places. [2024-06-14 11:34:05,993 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 263 transitions, 3468 flow [2024-06-14 11:34:05,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:05,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:05,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:05,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 11:34:05,993 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:34:05,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:05,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1422679574, now seen corresponding path program 4 times [2024-06-14 11:34:05,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:05,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679524569] [2024-06-14 11:34:05,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:05,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:06,118 INFO 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 11:34:06,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:06,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679524569] [2024-06-14 11:34:06,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679524569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:06,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:06,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:34:06,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294555599] [2024-06-14 11:34:06,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:06,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:34:06,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:06,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:34:06,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:34:06,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:34:06,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 263 transitions, 3468 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:06,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:06,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:34:06,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:08,015 INFO L124 PetriNetUnfolderBase]: 10172/15317 cut-off events. [2024-06-14 11:34:08,015 INFO L125 PetriNetUnfolderBase]: For 401139/401143 co-relation queries the response was YES. [2024-06-14 11:34:08,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97561 conditions, 15317 events. 10172/15317 cut-off events. For 401139/401143 co-relation queries the response was YES. Maximal size of possible extension queue 863. Compared 102970 event pairs, 3611 based on Foata normal form. 5/15320 useless extension candidates. Maximal degree in co-relation 97453. Up to 14407 conditions per place. [2024-06-14 11:34:08,298 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 238 selfloop transitions, 39 changer transitions 0/285 dead transitions. [2024-06-14 11:34:08,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 285 transitions, 4106 flow [2024-06-14 11:34:08,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:08,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:08,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-14 11:34:08,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5371428571428571 [2024-06-14 11:34:08,299 INFO L175 Difference]: Start difference. First operand has 212 places, 263 transitions, 3468 flow. Second operand 7 states and 188 transitions. [2024-06-14 11:34:08,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 285 transitions, 4106 flow [2024-06-14 11:34:10,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 285 transitions, 3985 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 11:34:10,265 INFO L231 Difference]: Finished difference. Result has 215 places, 265 transitions, 3471 flow [2024-06-14 11:34:10,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3363, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3471, PETRI_PLACES=215, PETRI_TRANSITIONS=265} [2024-06-14 11:34:10,266 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 162 predicate places. [2024-06-14 11:34:10,266 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 265 transitions, 3471 flow [2024-06-14 11:34:10,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:10,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:10,266 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, 1] [2024-06-14 11:34:10,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 11:34:10,267 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:34:10,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:10,267 INFO L85 PathProgramCache]: Analyzing trace with hash -200821654, now seen corresponding path program 5 times [2024-06-14 11:34:10,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:10,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358164895] [2024-06-14 11:34:10,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:10,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:10,396 INFO 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 11:34:10,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:10,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358164895] [2024-06-14 11:34:10,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358164895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:10,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:10,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:34:10,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260809773] [2024-06-14 11:34:10,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:10,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:34:10,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:10,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:34:10,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:34:10,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:34:10,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 265 transitions, 3471 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:10,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:10,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:34:10,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:12,257 INFO L124 PetriNetUnfolderBase]: 10168/15307 cut-off events. [2024-06-14 11:34:12,257 INFO L125 PetriNetUnfolderBase]: For 413031/413035 co-relation queries the response was YES. [2024-06-14 11:34:12,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97736 conditions, 15307 events. 10168/15307 cut-off events. For 413031/413035 co-relation queries the response was YES. Maximal size of possible extension queue 863. Compared 102935 event pairs, 3626 based on Foata normal form. 5/15309 useless extension candidates. Maximal degree in co-relation 97627. Up to 14384 conditions per place. [2024-06-14 11:34:12,461 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 221 selfloop transitions, 51 changer transitions 0/280 dead transitions. [2024-06-14 11:34:12,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 280 transitions, 4073 flow [2024-06-14 11:34:12,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:34:12,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:34:12,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-14 11:34:12,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5366666666666666 [2024-06-14 11:34:12,462 INFO L175 Difference]: Start difference. First operand has 215 places, 265 transitions, 3471 flow. Second operand 6 states and 161 transitions. [2024-06-14 11:34:12,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 280 transitions, 4073 flow [2024-06-14 11:34:14,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 280 transitions, 3966 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-14 11:34:14,600 INFO L231 Difference]: Finished difference. Result has 217 places, 267 transitions, 3499 flow [2024-06-14 11:34:14,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3376, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3499, PETRI_PLACES=217, PETRI_TRANSITIONS=267} [2024-06-14 11:34:14,600 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 164 predicate places. [2024-06-14 11:34:14,600 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 267 transitions, 3499 flow [2024-06-14 11:34:14,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:14,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:14,601 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 11:34:14,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 11:34:14,601 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:34:14,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:14,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1333255520, now seen corresponding path program 1 times [2024-06-14 11:34:14,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:14,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725889072] [2024-06-14 11:34:14,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:14,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:14,725 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 11:34:14,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:14,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725889072] [2024-06-14 11:34:14,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725889072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:14,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:14,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:34:14,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742270956] [2024-06-14 11:34:14,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:14,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:34:14,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:14,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:34:14,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:34:14,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:34:14,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 267 transitions, 3499 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:14,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:14,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:34:14,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:16,660 INFO L124 PetriNetUnfolderBase]: 10149/15277 cut-off events. [2024-06-14 11:34:16,660 INFO L125 PetriNetUnfolderBase]: For 423948/423948 co-relation queries the response was YES. [2024-06-14 11:34:16,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97565 conditions, 15277 events. 10149/15277 cut-off events. For 423948/423948 co-relation queries the response was YES. Maximal size of possible extension queue 860. Compared 102571 event pairs, 3593 based on Foata normal form. 6/15280 useless extension candidates. Maximal degree in co-relation 97455. Up to 14312 conditions per place. [2024-06-14 11:34:16,911 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 256 selfloop transitions, 28 changer transitions 0/292 dead transitions. [2024-06-14 11:34:16,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 292 transitions, 4237 flow [2024-06-14 11:34:16,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:34:16,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:34:16,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-14 11:34:16,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-06-14 11:34:16,912 INFO L175 Difference]: Start difference. First operand has 217 places, 267 transitions, 3499 flow. Second operand 6 states and 162 transitions. [2024-06-14 11:34:16,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 292 transitions, 4237 flow [2024-06-14 11:34:19,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 292 transitions, 4151 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 11:34:19,028 INFO L231 Difference]: Finished difference. Result has 221 places, 272 transitions, 3574 flow [2024-06-14 11:34:19,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3413, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3574, PETRI_PLACES=221, PETRI_TRANSITIONS=272} [2024-06-14 11:34:19,029 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 168 predicate places. [2024-06-14 11:34:19,030 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 272 transitions, 3574 flow [2024-06-14 11:34:19,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:19,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:19,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:19,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 11:34:19,030 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:34:19,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:19,031 INFO L85 PathProgramCache]: Analyzing trace with hash 142782008, now seen corresponding path program 1 times [2024-06-14 11:34:19,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:19,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988256132] [2024-06-14 11:34:19,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:19,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:19,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:19,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:19,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:19,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988256132] [2024-06-14 11:34:19,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988256132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:19,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:19,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:19,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057666039] [2024-06-14 11:34:19,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:19,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:19,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:19,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:19,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:19,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:34:19,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 272 transitions, 3574 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:19,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:19,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:34:19,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:21,513 INFO L124 PetriNetUnfolderBase]: 10350/15588 cut-off events. [2024-06-14 11:34:21,513 INFO L125 PetriNetUnfolderBase]: For 451979/451982 co-relation queries the response was YES. [2024-06-14 11:34:21,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100983 conditions, 15588 events. 10350/15588 cut-off events. For 451979/451982 co-relation queries the response was YES. Maximal size of possible extension queue 869. Compared 104953 event pairs, 3643 based on Foata normal form. 6/15589 useless extension candidates. Maximal degree in co-relation 100870. Up to 14377 conditions per place. [2024-06-14 11:34:21,922 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 208 selfloop transitions, 110 changer transitions 0/326 dead transitions. [2024-06-14 11:34:21,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 326 transitions, 4896 flow [2024-06-14 11:34:21,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:34:21,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:34:21,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-14 11:34:21,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 11:34:21,924 INFO L175 Difference]: Start difference. First operand has 221 places, 272 transitions, 3574 flow. Second operand 6 states and 180 transitions. [2024-06-14 11:34:21,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 326 transitions, 4896 flow [2024-06-14 11:34:24,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 326 transitions, 4839 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-14 11:34:24,554 INFO L231 Difference]: Finished difference. Result has 226 places, 304 transitions, 4380 flow [2024-06-14 11:34:24,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3517, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4380, PETRI_PLACES=226, PETRI_TRANSITIONS=304} [2024-06-14 11:34:24,555 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 173 predicate places. [2024-06-14 11:34:24,556 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 304 transitions, 4380 flow [2024-06-14 11:34:24,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:24,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:24,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:24,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 11:34:24,556 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:34:24,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:24,557 INFO L85 PathProgramCache]: Analyzing trace with hash -379479556, now seen corresponding path program 2 times [2024-06-14 11:34:24,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:24,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516208162] [2024-06-14 11:34:24,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:24,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:24,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:24,693 INFO 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 11:34:24,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:24,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516208162] [2024-06-14 11:34:24,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516208162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:24,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:24,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:24,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092050879] [2024-06-14 11:34:24,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:24,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:24,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:24,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:24,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:24,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:34:24,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 304 transitions, 4380 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:24,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:24,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:34:24,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:27,307 INFO L124 PetriNetUnfolderBase]: 10326/15558 cut-off events. [2024-06-14 11:34:27,307 INFO L125 PetriNetUnfolderBase]: For 488540/488543 co-relation queries the response was YES. [2024-06-14 11:34:27,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106156 conditions, 15558 events. 10326/15558 cut-off events. For 488540/488543 co-relation queries the response was YES. Maximal size of possible extension queue 867. Compared 104819 event pairs, 3643 based on Foata normal form. 6/15559 useless extension candidates. Maximal degree in co-relation 106040. Up to 14353 conditions per place. [2024-06-14 11:34:27,481 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 208 selfloop transitions, 112 changer transitions 0/328 dead transitions. [2024-06-14 11:34:27,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 328 transitions, 5158 flow [2024-06-14 11:34:27,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:27,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:27,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-14 11:34:27,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-14 11:34:27,483 INFO L175 Difference]: Start difference. First operand has 226 places, 304 transitions, 4380 flow. Second operand 7 states and 203 transitions. [2024-06-14 11:34:27,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 328 transitions, 5158 flow [2024-06-14 11:34:30,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 328 transitions, 4901 flow, removed 96 selfloop flow, removed 3 redundant places. [2024-06-14 11:34:30,445 INFO L231 Difference]: Finished difference. Result has 230 places, 306 transitions, 4415 flow [2024-06-14 11:34:30,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4145, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4415, PETRI_PLACES=230, PETRI_TRANSITIONS=306} [2024-06-14 11:34:30,446 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 177 predicate places. [2024-06-14 11:34:30,446 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 306 transitions, 4415 flow [2024-06-14 11:34:30,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:30,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:30,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:30,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 11:34:30,447 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:34:30,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:30,447 INFO L85 PathProgramCache]: Analyzing trace with hash -392815012, now seen corresponding path program 1 times [2024-06-14 11:34:30,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:30,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621163978] [2024-06-14 11:34:30,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:30,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:30,615 INFO 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 11:34:30,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:30,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621163978] [2024-06-14 11:34:30,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621163978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:30,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:30,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:30,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007045267] [2024-06-14 11:34:30,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:30,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:30,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:30,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:30,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:30,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:34:30,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 306 transitions, 4415 flow. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:30,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:30,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:34:30,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:33,261 INFO L124 PetriNetUnfolderBase]: 10331/15604 cut-off events. [2024-06-14 11:34:33,261 INFO L125 PetriNetUnfolderBase]: For 514771/514784 co-relation queries the response was YES. [2024-06-14 11:34:33,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104918 conditions, 15604 events. 10331/15604 cut-off events. For 514771/514784 co-relation queries the response was YES. Maximal size of possible extension queue 875. Compared 105679 event pairs, 2858 based on Foata normal form. 58/15456 useless extension candidates. Maximal degree in co-relation 104801. Up to 13471 conditions per place. [2024-06-14 11:34:33,611 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 244 selfloop transitions, 66 changer transitions 0/352 dead transitions. [2024-06-14 11:34:33,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 352 transitions, 5417 flow [2024-06-14 11:34:33,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:34:33,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:34:33,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-14 11:34:33,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-14 11:34:33,613 INFO L175 Difference]: Start difference. First operand has 230 places, 306 transitions, 4415 flow. Second operand 6 states and 186 transitions. [2024-06-14 11:34:33,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 352 transitions, 5417 flow [2024-06-14 11:34:35,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 352 transitions, 5143 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 11:34:35,872 INFO L231 Difference]: Finished difference. Result has 230 places, 317 transitions, 4477 flow [2024-06-14 11:34:35,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4141, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4477, PETRI_PLACES=230, PETRI_TRANSITIONS=317} [2024-06-14 11:34:35,873 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 177 predicate places. [2024-06-14 11:34:35,873 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 317 transitions, 4477 flow [2024-06-14 11:34:35,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:35,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:35,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:35,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 11:34:35,874 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:34:35,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:35,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1410217158, now seen corresponding path program 3 times [2024-06-14 11:34:35,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:35,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230493646] [2024-06-14 11:34:35,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:35,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:35,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:35,998 INFO 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 11:34:35,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:35,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230493646] [2024-06-14 11:34:35,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230493646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:35,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:35,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:35,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581413802] [2024-06-14 11:34:35,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:35,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:35,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:35,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:36,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:36,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:34:36,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 317 transitions, 4477 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:36,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:36,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:34:36,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:38,717 INFO L124 PetriNetUnfolderBase]: 10655/16048 cut-off events. [2024-06-14 11:34:38,717 INFO L125 PetriNetUnfolderBase]: For 465983/465986 co-relation queries the response was YES. [2024-06-14 11:34:38,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108922 conditions, 16048 events. 10655/16048 cut-off events. For 465983/465986 co-relation queries the response was YES. Maximal size of possible extension queue 887. Compared 108525 event pairs, 3658 based on Foata normal form. 1/16045 useless extension candidates. Maximal degree in co-relation 108805. Up to 14957 conditions per place. [2024-06-14 11:34:38,943 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 279 selfloop transitions, 77 changer transitions 0/364 dead transitions. [2024-06-14 11:34:38,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 364 transitions, 5654 flow [2024-06-14 11:34:38,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:34:38,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:34:38,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-06-14 11:34:38,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-14 11:34:38,945 INFO L175 Difference]: Start difference. First operand has 230 places, 317 transitions, 4477 flow. Second operand 9 states and 240 transitions. [2024-06-14 11:34:38,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 364 transitions, 5654 flow [2024-06-14 11:34:41,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 364 transitions, 5564 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-14 11:34:41,565 INFO L231 Difference]: Finished difference. Result has 239 places, 335 transitions, 4924 flow [2024-06-14 11:34:41,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4390, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4924, PETRI_PLACES=239, PETRI_TRANSITIONS=335} [2024-06-14 11:34:41,566 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 186 predicate places. [2024-06-14 11:34:41,566 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 335 transitions, 4924 flow [2024-06-14 11:34:41,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:41,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:41,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:41,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 11:34:41,566 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:34:41,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:41,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1410664488, now seen corresponding path program 4 times [2024-06-14 11:34:41,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:41,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547056632] [2024-06-14 11:34:41,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:41,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:41,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:41,693 INFO 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 11:34:41,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:41,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547056632] [2024-06-14 11:34:41,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547056632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:41,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:41,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:41,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832283885] [2024-06-14 11:34:41,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:41,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:41,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:41,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:41,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:41,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:34:41,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 335 transitions, 4924 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:41,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:41,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:34:41,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:44,527 INFO L124 PetriNetUnfolderBase]: 10662/16059 cut-off events. [2024-06-14 11:34:44,527 INFO L125 PetriNetUnfolderBase]: For 493068/493071 co-relation queries the response was YES. [2024-06-14 11:34:44,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111421 conditions, 16059 events. 10662/16059 cut-off events. For 493068/493071 co-relation queries the response was YES. Maximal size of possible extension queue 887. Compared 108434 event pairs, 3658 based on Foata normal form. 1/16056 useless extension candidates. Maximal degree in co-relation 111300. Up to 14965 conditions per place. [2024-06-14 11:34:44,847 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 275 selfloop transitions, 78 changer transitions 0/361 dead transitions. [2024-06-14 11:34:44,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 361 transitions, 5868 flow [2024-06-14 11:34:44,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:34:44,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:34:44,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-14 11:34:44,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-14 11:34:44,849 INFO L175 Difference]: Start difference. First operand has 239 places, 335 transitions, 4924 flow. Second operand 8 states and 215 transitions. [2024-06-14 11:34:44,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 361 transitions, 5868 flow [2024-06-14 11:34:47,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 361 transitions, 5632 flow, removed 88 selfloop flow, removed 4 redundant places. [2024-06-14 11:34:47,580 INFO L231 Difference]: Finished difference. Result has 243 places, 339 transitions, 4942 flow [2024-06-14 11:34:47,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4726, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4942, PETRI_PLACES=243, PETRI_TRANSITIONS=339} [2024-06-14 11:34:47,581 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 190 predicate places. [2024-06-14 11:34:47,581 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 339 transitions, 4942 flow [2024-06-14 11:34:47,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:47,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:47,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:47,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 11:34:47,582 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 11:34:47,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:47,584 INFO L85 PathProgramCache]: Analyzing trace with hash 317470311, now seen corresponding path program 1 times [2024-06-14 11:34:47,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:47,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407474342] [2024-06-14 11:34:47,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:47,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:47,795 INFO 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 11:34:47,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:47,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407474342] [2024-06-14 11:34:47,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407474342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:47,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:47,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:34:47,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498616929] [2024-06-14 11:34:47,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:47,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:34:47,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:47,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:34:47,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:34:47,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:34:47,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 339 transitions, 4942 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 11:34:47,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:47,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:34:47,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:50,864 INFO L124 PetriNetUnfolderBase]: 10845/16384 cut-off events. [2024-06-14 11:34:50,865 INFO L125 PetriNetUnfolderBase]: For 529876/529879 co-relation queries the response was YES. [2024-06-14 11:34:51,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113131 conditions, 16384 events. 10845/16384 cut-off events. For 529876/529879 co-relation queries the response was YES. Maximal size of possible extension queue 905. Compared 110527 event pairs, 2020 based on Foata normal form. 36/16415 useless extension candidates. Maximal degree in co-relation 113009. Up to 10890 conditions per place. [2024-06-14 11:34:51,126 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 299 selfloop transitions, 90 changer transitions 0/397 dead transitions. [2024-06-14 11:34:51,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 397 transitions, 6237 flow [2024-06-14 11:34:51,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:51,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:51,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 222 transitions. [2024-06-14 11:34:51,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6342857142857142 [2024-06-14 11:34:51,128 INFO L175 Difference]: Start difference. First operand has 243 places, 339 transitions, 4942 flow. Second operand 7 states and 222 transitions. [2024-06-14 11:34:51,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 397 transitions, 6237 flow [2024-06-14 11:34:54,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 397 transitions, 6094 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 11:34:54,204 INFO L231 Difference]: Finished difference. Result has 246 places, 340 transitions, 5015 flow [2024-06-14 11:34:54,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4799, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5015, PETRI_PLACES=246, PETRI_TRANSITIONS=340} [2024-06-14 11:34:54,205 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 193 predicate places. [2024-06-14 11:34:54,205 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 340 transitions, 5015 flow [2024-06-14 11:34:54,206 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 11:34:54,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:54,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:54,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 11:34:54,206 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 11:34:54,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:54,207 INFO L85 PathProgramCache]: Analyzing trace with hash -530775617, now seen corresponding path program 2 times [2024-06-14 11:34:54,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:54,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681494099] [2024-06-14 11:34:54,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:54,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:54,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:54,360 INFO 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 11:34:54,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:54,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681494099] [2024-06-14 11:34:54,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681494099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:54,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:54,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:34:54,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852196236] [2024-06-14 11:34:54,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:54,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:34:54,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:54,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:34:54,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:34:54,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:34:54,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 340 transitions, 5015 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 11:34:54,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:54,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:34:54,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:57,417 INFO L124 PetriNetUnfolderBase]: 10761/16264 cut-off events. [2024-06-14 11:34:57,417 INFO L125 PetriNetUnfolderBase]: For 524127/524130 co-relation queries the response was YES. [2024-06-14 11:34:57,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112365 conditions, 16264 events. 10761/16264 cut-off events. For 524127/524130 co-relation queries the response was YES. Maximal size of possible extension queue 897. Compared 110010 event pairs, 2998 based on Foata normal form. 36/16295 useless extension candidates. Maximal degree in co-relation 112242. Up to 14364 conditions per place. [2024-06-14 11:34:57,641 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 329 selfloop transitions, 39 changer transitions 0/376 dead transitions. [2024-06-14 11:34:57,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 376 transitions, 5873 flow [2024-06-14 11:34:57,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:34:57,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:34:57,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-14 11:34:57,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6033333333333334 [2024-06-14 11:34:57,642 INFO L175 Difference]: Start difference. First operand has 246 places, 340 transitions, 5015 flow. Second operand 6 states and 181 transitions. [2024-06-14 11:34:57,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 376 transitions, 5873 flow [2024-06-14 11:34:59,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 376 transitions, 5624 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 11:34:59,625 INFO L231 Difference]: Finished difference. Result has 246 places, 339 transitions, 4793 flow [2024-06-14 11:34:59,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4710, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4793, PETRI_PLACES=246, PETRI_TRANSITIONS=339} [2024-06-14 11:34:59,626 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 193 predicate places. [2024-06-14 11:34:59,626 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 339 transitions, 4793 flow [2024-06-14 11:34:59,626 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 11:34:59,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:59,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:59,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 11:34:59,627 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 11:34:59,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:59,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1735405608, now seen corresponding path program 5 times [2024-06-14 11:34:59,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:59,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727289170] [2024-06-14 11:34:59,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:59,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:59,975 INFO 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 11:34:59,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:59,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727289170] [2024-06-14 11:34:59,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727289170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:59,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:59,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:59,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090512906] [2024-06-14 11:34:59,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:59,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:59,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:59,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:59,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:35:00,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:35:00,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 339 transitions, 4793 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:00,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:00,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:35:00,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:02,686 INFO L124 PetriNetUnfolderBase]: 10757/16223 cut-off events. [2024-06-14 11:35:02,686 INFO L125 PetriNetUnfolderBase]: For 506001/506004 co-relation queries the response was YES. [2024-06-14 11:35:02,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110519 conditions, 16223 events. 10757/16223 cut-off events. For 506001/506004 co-relation queries the response was YES. Maximal size of possible extension queue 902. Compared 110081 event pairs, 3732 based on Foata normal form. 1/16218 useless extension candidates. Maximal degree in co-relation 110396. Up to 15114 conditions per place. [2024-06-14 11:35:02,942 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 270 selfloop transitions, 74 changer transitions 0/352 dead transitions. [2024-06-14 11:35:02,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 352 transitions, 5513 flow [2024-06-14 11:35:02,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:35:02,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:35:02,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-14 11:35:02,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5433333333333333 [2024-06-14 11:35:02,943 INFO L175 Difference]: Start difference. First operand has 246 places, 339 transitions, 4793 flow. Second operand 6 states and 163 transitions. [2024-06-14 11:35:02,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 352 transitions, 5513 flow